Quarterly Report (10-q)

Expected capital expenditures (excluding AFUDC)

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)



X	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
	EXCHANGE ACT OF 1934
	For the quarterly period ended September 30, 2018
	OR
	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
	EXCHANGE ACT OF 1934
	For the transition period from __________ to __________
		Exact name of registrants as specified	I.R.S. Employer
Commission File		in their charters, address of principal	Identification
Number		executive offices, zip code and telephone number	Number
1-14465		IDACORP, Inc.	82-0505802
1-3198		Idaho Power Company	82-0130980
		1221 W. Idaho Street
		Boise, Idaho 83702-5627
		(208) 388-2200
		State of Incorporation: Idaho
		None
Former name, former address and former fiscal year, if changed since last report.

Indicate by check mark whether the registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days.

IDACORP, Inc.: Yes X No __ Idaho Power Company: Yes X No __

Indicate by check mark whether the registrants have submitted electronically and posted on their corporate Web sites, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrants were required to submit and post such files).

IDACORP, Inc.: Yes X No __ Idaho Power Company: Yes X No __

Indicate by check mark whether the registrants are large accelerated filers, accelerated filers, non-accelerated filers, smaller reporting companies, or emerging growth companies. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act:

IDACORP, Inc.:

Large accelerated filer X Accelerated filer __ Non-accelerated filer __

Smaller reporting company __

Emerging growth company __

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange

Act. __

Idaho Power Company:

Large accelerated filer __ Accelerated filer __ Non-accelerated filer X

Smaller reporting company __

Emerging growth company __

Act. __

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Indicate by check mark whether the registrants are shell companies (as defined in Rule 12b-2 of the Exchange Act).

IDACORP, Inc.: Yes __ No X Idaho Power Company: Yes __ No X

Number of shares of common stock outstanding as of October 26, 2018 :

IDACORP, Inc.: 50,392,789

Idaho Power Company: 39,150,812, all held by IDACORP, Inc.

This combined Form 10-Q represents separate filings by IDACORP, Inc. and Idaho Power Company. Information contained herein relating to an individual registrant is filed by that registrant on its own behalf. Idaho Power Company makes no representations as to the information relating to IDACORP, Inc.’s other operations.

Idaho Power Company meets the conditions set forth in General Instruction (H)(1)(a) and (b) of Form 10-Q and is therefore filing this report on Form 10-Q with the reduced disclosure format.

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TABLE OF CONTENTS
				Page
Commonly Used Terms				4
Cautionary Note Regarding Forward-Looking Statements				5

Part I. Financial Information

	Item 1. Financial Statements (unaudited)
		IDACORP, Inc.:
			Condensed Consolidated Statements of Income	7
			Condensed Consolidated Statements of Comprehensive Income	8
			Condensed Consolidated Balance Sheets	9
			Condensed Consolidated Statements of Cash Flows	11
			Condensed Consolidated Statements of Equity	12
		Idaho Power Company:
			Condensed Consolidated Statements of Income	13
			Condensed Consolidated Statements of Comprehensive Income	14
			Condensed Consolidated Balance Sheets	15
			Condensed Consolidated Statements of Cash Flows	17
		Notes to Condensed Consolidated Financial Statements		18
		Reports of Independent Registered Public Accounting Firm		37
	Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations			39
	Item 3. Quantitative and Qualitative Disclosures About Market Risk			65
	Item 4. Controls and Procedures			67

Part II. Other Information

	Item 1. Legal Proceedings			68
	Item 1A. Risk Factors			68
	Item 2. Unregistered Sales of Equity Securities and Use of Proceeds			68
	Item 3. Defaults Upon Senior Securities			68
	Item 4. Mine Safety Disclosures			68
	Item 5. Other Information			68
	Item 6. Exhibits			69

Signatures				70

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COMMONLY USED TERMS

The following select abbreviations, terms, or acronyms are commonly used or found in multiple locations in this report:

ADITC	-	Accumulated Deferred Investment Tax Credits
AFUDC	-	Allowance for Funds Used During Construction
AOCI	-	Accumulated Other Comprehensive Income
ASU	-	Accounting Standards Update
BCC	-	Bridger Coal Company, a joint venture of IERCo
BLM	-	U.S. Bureau of Land Management
CWA	-	Clean Water Act
FASB	-	Financial Accounting Standards Board
FCA	-	Fixed Cost Adjustment
FERC	-	Federal Energy Regulatory Commission
FPA	-	Federal Power Act
HCC	-	Hells Canyon Complex
IDACORP	-	IDACORP, Inc., an Idaho corporation
Idaho Power	-	Idaho Power Company, an Idaho corporation
Idaho ROE	-	Idaho-jurisdiction return on year-end equity
Ida-West	-	Ida-West Energy, a subsidiary of IDACORP, Inc.
IERCo	-	Idaho Energy Resources Co., a subsidiary of Idaho Power Company
IFS	-	IDACORP Financial Services, a subsidiary of IDACORP, Inc.
IPUC	-	Idaho Public Utilities Commission
IRP	-	Integrated Resource Plan
MD&A	-	Management’s Discussion and Analysis of Financial Condition and Results of Operations
MW	-	Megawatt
MWh	-	Megawatt-hour
O&M	-	Operations and Maintenance
OATT	-	Open Access Transmission Tariff
OPUC	-	Public Utility Commission of Oregon
PCA	-	Idaho-Jurisdiction Power Cost Adjustment
PURPA	-	Public Utility Regulatory Policies Act of 1978
SEC	-	U.S. Securities and Exchange Commission
SMSP	-	Security Plan for Senior Management Employees
Valmy Plant	-	North Valmy coal-fired power plant
Western EIM	-	Energy imbalance market implemented in the western United States
WPSC	-	Wyoming Public Service Commission

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

In addition to the historical information contained in this report, this report contains (and oral communications made by IDACORP, Inc. (IDACORP) and Idaho Power Company (Idaho Power) may contain) statements that relate to future events and expectations, such as statements regarding projected or future financial performance, cash flows, capital expenditures, dividends, capital structure or ratios, strategic goals, challenges, objectives, and plans for future operations. Such statements constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Any statements that express, or involve discussions as to, expectations, beliefs, plans, objectives, assumptions, or future events, or performance, often, but not always, through the use of words or phrases such as "anticipates," "believes," "continues," "could," "estimates," "expects," "guidance," "intends," "potential," "plans," "predicts," "projects," "may result," "may continue," or similar expressions, are not statements of historical facts and may be forward-looking. Forward-looking statements are not guarantees of future performance and involve estimates, assumptions, risks, and uncertainties. Actual results, performance, or outcomes may differ materially from the results discussed in the statements. In addition to any assumptions and other factors and matters referred to specifically in connection with such forward-looking statements, factors that could cause actual results or outcomes to differ materially from those contained in forward-looking statements include those factors set forth in this report, IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017, particularly Part I, Item 1A - "Risk Factors" and Part II, Item 7 - "Management’s Discussion and Analysis of Financial Condition and Results of Operations" of that report, subsequent reports filed by IDACORP and Idaho Power with the U.S. Securities and Exchange Commission, and the following important factors:


•	decisions by the Idaho and Oregon public utilities commissions and the Federal Energy Regulatory Commission, which impact Idaho Power's ability to recover costs and earn a return on investment;


•	the expense and risks associated with capital expenditures for utility infrastructure, and the timing and availability of cost recovery for such expenditures through customer rates, including the potential for the write-down or write-off of expenditures if not deemed prudent by regulators;

•

changes in residential, commercial, and industrial growth and demographic patterns within Idaho Power's service area, the loss or change in the business of significant customers, or the addition of new customers and their associated impacts on loads and load growth, and the availability of regulatory mechanisms that allow for timely cost recovery through customer rates in the event of those changes;


•	the impacts of economic conditions, including inflation, interest rates, authorized regulatory returns on equity, supply costs, population growth or decline in Idaho Power's service area, changes in customer demand for electricity, revenue from sales of excess power, credit quality of counterparties and suppliers, and the collection of receivables;

•

unseasonable or severe weather conditions, wildfires, drought, and other natural phenomena and natural disasters, including conditions and events associated with climate change, which affect customer demand, hydroelectric generation levels, repair costs, liability for damage caused by utility property, and the availability and cost of fuel for generation plants or purchased power to serve customers;


•	advancement of self-generation and storage and energy efficiency technologies that may affect Idaho Power's sales or delivery of electric power;


•	changes in tax laws or related regulations or new interpretations of applicable laws by federal, state, or local taxing jurisdictions, the availability of tax credits, and the tax rates payable by IDACORP shareholders on common stock dividends;


•	adoption of, changes in, and costs of compliance with laws, regulations, and policies relating to the environment, natural resources, and threatened and endangered species, and the ability to recover resulting increased costs through rates;


•	variable hydrological conditions and/or over-appropriation of surface and groundwater in the Snake River Basin, which may impact the amount of power generated by Idaho Power's hydroelectric facilities;


•	the ability to acquire fuel, power, and transmission capacity under reasonable terms, particularly in the event of unanticipated power demands, lack of physical availability, transportation constraints, or a credit downgrade;

•

accidents, fires (either at or caused by Idaho Power's facilities or infrastructure), explosions, and mechanical breakdowns that may occur while operating and maintaining Idaho Power's assets, which can cause unplanned outages, reduce generating output, damage the companies’ assets, operations, or reputation, subject the companies to third-party claims for property damage, personal injury, or loss of life, or result in the imposition of civil, criminal, and regulatory fines and penalties, for which the companies may have inadequate insurance coverage;


•	the increased purchased power costs and operational challenges associated with purchasing and integrating intermittent renewable energy sources into Idaho Power's resource portfolio;

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•	disruptions or outages of Idaho Power's generation or transmission systems or of any interconnected transmission system that cause Idaho Power to incur repair costs or purchase replacement power at increased costs;


•	the ability to obtain debt and equity financing or refinance existing debt when necessary and on favorable terms, which can be affected by factors such as credit ratings, volatility or disruptions in the financial markets, interest rate fluctuations, decisions by the Idaho or Oregon public utility commissions, and the companies' past or projected financial performance;


•	reductions in credit ratings, which could adversely impact access to debt and equity markets, increase borrowing costs, and would require the posting of additional collateral to counterparties pursuant to credit and contractual arrangements;


•	the ability to enter into financial and physical commodity hedges with creditworthy counterparties to manage price and commodity risk, and the failure of any such risk management and hedging strategies to work as intended;


•	changes in actuarial assumptions, changes in interest rates, and the return on plan assets for pension and other post-retirement plans, which can affect future pension and other postretirement plan funding obligations, costs, and liabilities;


•	the ability to continue to pay dividends based on financial performance and in light of contractual covenants and restrictions and regulatory limitations;


•	employee workforce factors, including the operational and financial costs of unionization or the attempt to unionize all or part of the companies' workforce, the impact of an aging workforce and retirements, the cost and ability to attract and retain skilled workers, and the ability to adjust the labor cost structure when necessary;


•	failure to comply with state and federal laws, regulations, and orders, including new interpretations and enforcement initiatives by regulatory and oversight bodies, which may result in penalties and fines and increase the cost of compliance, the nature and extent of investigations and audits, and the cost of remediation;


•	the inability to obtain or cost of obtaining and complying with required governmental permits and approvals, licenses, rights-of-way, and siting for transmission and generation projects and hydroelectric facilities;


•	the cost and outcome of litigation, dispute resolution, and regulatory proceedings, and the ability to recover those costs or the costs of operational changes through insurance or rates, or from third parties;


•	the failure of information systems or the failure to secure data, failure to comply with privacy laws or regulations, security breaches, or the direct or indirect effect on the companies' business, operations or reputation resulting from cyber-attacks or related litigation, terrorist incidents or the threat of terrorist incidents, and acts of war;


•	unusual or unanticipated changes in normal business operations, including unusual maintenance or repairs, or the failure to successfully implement new technology solutions; and


•	adoption of or changes in accounting policies and principles, changes in accounting estimates, and new U.S. Securities and Exchange Commission or New York Stock Exchange requirements, or new interpretations of existing requirements.

Any forward-looking statement speaks only as of the date on which such statement is made. New factors emerge from time to time and it is not possible for management to predict all such factors, nor can it assess the impact of any such factor on the business or the extent to which any factor, or combination of factors, may cause results to differ materially from those contained in any forward-looking statement. IDACORP and Idaho Power disclaim any obligation to update publicly any forward-looking information, whether in response to new information, future events, or otherwise, except as required by applicable law.

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PART I – FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

IDACORP, Inc.

Condensed Consolidated Statements of Income

(unaudited)



	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
	(in thousands, except per share amounts)
Operating Revenues:
Electric utility revenues	$	407,355		$	406,655		$	1,055,515		$	1,040,387
Other	1,446			1,669			3,345			3,487
Total operating revenues	408,801			408,324			1,058,860			1,043,874

Operating Expenses:
Electric utility:
Purchased power	92,393			75,653			217,301			186,275
Fuel expense	53,623			54,529			102,873			111,197
Power cost adjustment	(5,075		)	10,979			40,427			51,208
Other operations and maintenance	91,563			83,445			270,075			257,167
Energy efficiency programs	9,309			9,883			25,708			26,726
Depreciation	41,668			40,259			123,084			122,262
Taxes other than income taxes	8,911			8,614			27,306			26,134
Total electric utility expenses	292,392			283,362			806,774			780,969
Other	1,176			1,255			3,430			3,666
Total operating expenses	293,568			284,617			810,204			784,635

Operating Income	115,233			123,707			248,656			259,239

Allowance for Equity Funds Used During Construction	6,047			5,712			18,065			16,555

Earnings of Equity-Method Investments	6,665			5,232			12,218			7,269

Other Income (Expense), Net	350			(537		)	199			(1,377		)

Interest Expense:
Interest on long-term debt	21,153			20,300			63,252			60,897
Other interest	3,189			2,827			8,310			8,298
Allowance for borrowed funds used during construction	(2,506		)	(2,385		)	(7,584		)	(7,106		)
Total interest expense, net	21,836			20,742			63,978			62,089

Income Before Income Taxes	106,459			113,372			215,160			219,597

Income Tax Expense	3,868			22,296			13,866			45,420

Net Income	102,591			91,076			201,294			174,177
Adjustment for income attributable to noncontrolling interests	(360		)	(442		)	(633		)	(610		)
Net Income Attributable to IDACORP, Inc.	$	102,231		$	90,634		$	200,661		$	173,567
Weighted Average Common Shares Outstanding - Basic	50,434			50,362			50,431			50,361
Weighted Average Common Shares Outstanding - Diluted	50,565			50,421			50,503			50,408
Earnings Per Share of Common Stock:
Earnings Attributable to IDACORP, Inc. - Basic	$	2.03		$	1.80		$	3.98		$	3.45
Earnings Attributable to IDACORP, Inc. - Diluted	$	2.02		$	1.80		$	3.97		$	3.44
Dividends Declared Per Share of Common Stock	$	0.59		$	0.55		$	1.77		$	1.65

The accompanying notes are an integral part of these statements.

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IDACORP, Inc.

Condensed Consolidated Statements of Comprehensive Income

(unaudited)



	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
	(in thousands)

Net Income	$	102,591		$	91,076		$	201,294		$	174,177
Other Comprehensive Income:
Unfunded pension liability adjustment, net of tax of $250, $302, $750, and $906	721			471			2,164			1,412
Total Comprehensive Income	103,312			91,547			203,458			175,589
Comprehensive income attributable to noncontrolling interests	(360		)	(442		)	(633		)	(610		)
Comprehensive Income Attributable to IDACORP, Inc.	$	102,952		$	91,105		$	202,825		$	174,979

The accompanying notes are an integral part of these statements.

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IDACORP, Inc.

Condensed Consolidated Balance Sheets

(unaudited)



	September 30, 2018			December 31, 2017
	(in thousands)
Assets

Current Assets:
Cash and cash equivalents	$	261,250		$	76,649
Receivables:
Customer (net of allowance of $1,657 and $2,013, respectively)	93,138			75,249
Other (net of allowance of $242 and $180, respectively)	5,987			30,438
Taxes receivable	—			8,147
Accrued unbilled revenues	59,645			75,120
Materials and supplies (at average cost)	58,391			55,745
Fuel stock (at average cost)	57,769			56,638
Prepayments	14,998			16,984
Current regulatory assets	30,638			48,613
Other	902			18
Total current assets	582,718			443,601
Investments	101,853			115,698
Property, Plant and Equipment:
Utility plant in service	6,043,460			5,906,162
Accumulated provision for depreciation	(2,192,315		)	(2,098,274		)
Utility plant in service - net	3,851,145			3,807,888
Construction work in progress	478,973			452,424
Utility plant held for future use	4,726			8,075
Other property, net of accumulated depreciation	17,799			15,488
Property, plant and equipment - net	4,352,643			4,283,875
Other Assets:
Company-owned life insurance	61,033			59,323
Regulatory assets	1,127,668			1,083,483
Other	62,721			59,425
Total other assets	1,251,422			1,202,231
Total	$	6,288,636		$	6,045,405

The accompanying notes are an integral part of these statements.

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IDACORP, Inc.

Condensed Consolidated Balance Sheets

(unaudited)



	September 30, 2018			December 31, 2017
	(in thousands)
Liabilities and Equity

Current Liabilities:
Accounts payable	$	75,654		$	90,277
Taxes accrued	47,797			11,075
Interest accrued	21,722			22,379
Accrued compensation	47,761			47,018
Current regulatory liabilities	25,487			1,404
Advances from customers	23,049			18,414
Other	8,936			10,182
Total current liabilities	250,406			200,749
Other Liabilities:
Deferred income taxes	630,460			660,940
Regulatory liabilities	740,937			698,044
Pension and other postretirement benefits	415,619			438,869
Other	43,315			44,566
Total other liabilities	1,830,331			1,842,419
Long-Term Debt	1,834,422			1,746,123
Commitments and Contingencies
Equity:
IDACORP, Inc. shareholders’ equity:
Common stock, no par value (120,000 shares authorized; 50,420 shares issued)	861,515			857,207
Retained earnings	1,537,332			1,426,528
Accumulated other comprehensive loss	(28,800		)	(30,964		)
Treasury stock (27 shares and 28 shares, respectively, at cost)	(1,932		)	(1,386		)
Total IDACORP, Inc. shareholders’ equity	2,368,115			2,251,385
Noncontrolling interests	5,362			4,729
Total equity	2,373,477			2,256,114
Total	$	6,288,636		$	6,045,405

The accompanying notes are an integral part of these statements.

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IDACORP, Inc.

Condensed Consolidated Statements of Cash Flows

(unaudited)



	Nine months ended September 30,
	2018			2017
	(in thousands)
Operating Activities:
Net income	$	201,294		$	174,177
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	125,966			125,051
Deferred income taxes and investment tax credits	(19,497		)	(195		)
Changes in regulatory assets and liabilities	51,173			61,968
Pension and postretirement benefit plan expense	21,033			21,687
Contributions to pension and postretirement benefit plans	(45,236		)	(45,158		)
Earnings of equity-method investments	(12,218		)	(7,269		)
Distributions from equity-method investments	21,750			18,350
Allowance for equity funds used during construction	(18,065		)	(16,555		)
Other non-cash adjustments to net income, net	6,866			5,220
Change in:
Accounts receivable	(12,976		)	(23,480		)
Accounts payable and other accrued liabilities	(6,497		)	(32,494		)
Taxes accrued/receivable	44,869			54,687
Other current assets	12,616			18,736
Other current liabilities	1,619			(3,010		)
Other assets	(5,504		)	(5,256		)
Other liabilities	(1,250		)	(494		)
Net cash provided by operating activities	365,943			345,965
Investing Activities:
Additions to property, plant and equipment	(197,975		)	(207,340		)
Payments received from transmission project joint funding partners	21,046			5,934
Proceeds from the sale of emission allowances and renewable energy certificates	2,562			1,892
Purchase of equity securities	(1,172		)	(3,248		)
Proceeds from the sale of equity securities	3,772			3,755
Other	1,288			3,042
Net cash used in investing activities	(170,479		)	(195,965		)
Financing Activities:
Issuance of long-term debt	220,000			—
Retirement of long-term debt	(130,000		)	(1,064		)
Dividends on common stock	(89,674		)	(83,441		)
Net change in short-term borrowings	—			(19,375		)
Acquisition of treasury stock	(3,614		)	(3,189		)
Make-whole premium on retirement of long-term debt	(4,607		)	—
Debt issuance costs and other	(2,968		)	—
Net cash used in financing activities	(10,863		)	(107,069		)
Net increase in cash and cash equivalents	184,601			42,931
Cash and cash equivalents at beginning of the period	76,649			61,480
Cash and cash equivalents at end of the period	$	261,250		$	104,411
Supplemental Disclosure of Cash Flow Information:
Cash paid during the period for:
Income taxes	$	—		$	1,702
Interest (net of amount capitalized)	$	61,832		$	60,257
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	$	22,715		$	23,502

The accompanying notes are an integral part of these statements.

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IDACORP, Inc.

Condensed Consolidated Statements of Equity

(unaudited)



	Nine months ended September 30,
	2018			2017
	(in thousands)
Common Stock
Balance at beginning of period	$	857,207		$	851,833
Share-based compensation expense and other	4,308			3,210
Balance at end of period	861,515			855,043
Retained Earnings
Balance at beginning of period	1,426,528			1,323,198
Net income attributable to IDACORP, Inc.	200,661			173,567
Common stock dividends ($1.77 and $1.65 per share)	(89,857		)	(83,378		)
Balance at end of period	1,537,332			1,413,387
Accumulated Other Comprehensive (Loss) Income
Balance at beginning of period	(30,964		)	(20,882		)
Unfunded pension liability adjustment (net of tax)	2,164			1,412
Balance at end of period	(28,800		)	(19,470		)
Treasury Stock
Balance at beginning of period	(1,386		)	(243		)
Issued	3,068			2,063
Acquired	(3,614		)	(3,188		)
Balance at end of period	(1,932		)	(1,368		)
Total IDACORP, Inc. shareholders’ equity at end of period	2,368,115			2,247,592
Noncontrolling Interests
Balance at beginning of period	4,729			3,960
Net income attributable to noncontrolling interests	633			610
Balance at end of period	5,362			4,570
Total equity at end of period	$	2,373,477		$	2,252,162

The accompanying notes are an integral part of these statements.

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Idaho Power Company

Condensed Consolidated Statements of Income

(unaudited)



	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
	(in thousands)

Operating Revenues	$	407,355		$	406,655		$	1,055,515		$	1,040,387

Operating Expenses:
Operation:
Purchased power	92,393			75,653			217,301			186,275
Fuel expense	53,623			54,529			102,873			111,197
Power cost adjustment	(5,075		)	10,979			40,427			51,208
Other operations and maintenance	91,563			83,445			270,075			257,167
Energy efficiency programs	9,309			9,883			25,708			26,726
Depreciation	41,668			40,259			123,084			122,262
Taxes other than income taxes	8,911			8,614			27,306			26,134
Total operating expenses	292,392			283,362			806,774			780,969

Income from Operations	114,963			123,293			248,741			259,418

Other Income (Expense):
Allowance for equity funds used during construction	6,047			5,712			18,065			16,555
Earnings of equity-method investments	5,564			4,151			10,390			5,068
Other expense, net	(398		)	(1,160		)	(1,917		)	(3,456		)
Total other income	11,213			8,703			26,538			18,167

Interest Expense:
Interest on long-term debt	21,153			20,300			63,252			60,897
Other interest	3,174			2,811			8,268			8,249
Allowance for borrowed funds used during construction	(2,506		)	(2,385		)	(7,584		)	(7,106		)
Total interest expense, net	21,821			20,726			63,936			62,040

Income Before Income Taxes	104,355			111,270			211,343			215,545

Income Tax Expense	4,161			22,941			14,656			46,353

Net Income	$	100,194		$	88,329		$	196,687		$	169,192

The accompanying notes are an integral part of these statements.

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Idaho Power Company

Condensed Consolidated Statements of Comprehensive Income

(unaudited)



	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
	(in thousands)

Net Income	$	100,194	$	88,329	$	196,687	$	169,192
Other Comprehensive Income:
Unfunded pension liability adjustment, net of tax of $250, $302, $750, and $906	721		471		2,164		1,412
Total Comprehensive Income	$	100,915	$	88,800	$	198,851	$	170,604

The accompanying notes are an integral part of these statements.

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Idaho Power Company

Condensed Consolidated Balance Sheets

(unaudited)



	September 30, 2018				December 31, 2017
	(in thousands)
Assets

Electric Plant:
In service (at original cost)	$	6,043,460			$	5,906,162
Accumulated provision for depreciation	(2,192,315		)		(2,098,274		)
In service - net	3,851,145				3,807,888
Construction work in progress	478,973				452,424
Held for future use	4,726				8,075
Electric plant - net	4,334,844				4,268,387
Investments and Other Property	89,298				99,904
Current Assets:
Cash and cash equivalents	186,227				44,646
Receivables:
Customer (net of allowance of $1,657 and $2,013, respectively)	93,138				75,249
Other (net of allowance of $242 and $180, respectively)	5,853				30,274
Taxes receivable	—				26,492
Accrued unbilled revenues	59,645				75,120
Materials and supplies (at average cost)	58,391				55,745
Fuel stock (at average cost)	57,769			56,638
Prepayments	14,887				16,866
Current regulatory assets	30,638				48,613
Other	902				18
Total current assets	507,450				429,661
Deferred Debits:
Company-owned life insurance	61,033				59,323
Regulatory assets	1,127,668				1,083,483
Other	58,084				54,677
Total deferred debits	1,246,785				1,197,483
Total	$	6,178,377			$	5,995,435

The accompanying notes are an integral part of these statements.

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Idaho Power Company

Condensed Consolidated Balance Sheets

(unaudited)



	September 30, 2018			December 31, 2017
	(in thousands)
Capitalization and Liabilities

Capitalization:
Common stock equity:
Common stock, $2.50 par value (50,000 shares authorized; 39,151 shares outstanding)	$	97,877		$	97,877
Premium on capital stock	712,258			712,258
Capital stock expense	(2,097		)	(2,097		)
Retained earnings	1,415,532			1,308,702
Accumulated other comprehensive loss	(28,800		)	(30,964		)
Total common stock equity	2,194,770			2,085,776
Long-term debt	1,834,422			1,746,123
Total capitalization	4,029,192			3,831,899
Current Liabilities:
Accounts payable	75,440			89,978
Accounts payable to affiliates	2,207			57,562
Taxes accrued	30,575			10,904
Interest accrued	21,722			22,379
Accrued compensation	47,583			46,832
Current regulatory liabilities	25,487			1,404
Advances from customers	23,049			18,414
Other	8,198			9,556
Total current liabilities	234,261			257,029
Deferred Credits:
Deferred income taxes	715,873			725,942
Regulatory liabilities	740,937			698,044
Pension and other postretirement benefits	415,619			438,869
Other	42,495			43,652
Total deferred credits	1,914,924			1,906,507

Commitments and Contingencies

Total	$	6,178,377		$	5,995,435

The accompanying notes are an integral part of these statements.

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Idaho Power Company

Condensed Consolidated Statements of Cash Flows

(unaudited)



	Nine months ended September 30,
	2018			2017
	(in thousands)
Operating Activities:
Net income	$	196,687		$	169,192
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	125,516			124,599
Deferred income taxes and investment tax credits	(567		)	1,972
Changes in regulatory assets and liabilities	51,174			61,965
Pension and postretirement benefit plan expense	21,018			21,704
Contributions to pension and postretirement benefit plans	(45,220		)	(45,174		)
Earnings of equity-method investments	(10,390		)	(5,068		)
Distributions from equity-method investments	20,900			17,500
Allowance for equity funds used during construction	(18,065		)	(16,555		)
Other non-cash adjustments to net income, net	(446		)	12
Change in:
Accounts receivable	(13,089		)	(30,329		)
Accounts payable	(61,682		)	14,155
Taxes accrued/receivable	46,163			35,967
Other current assets	12,609			18,732
Other current liabilities	1,627			(3,004		)
Other assets	(5,505		)	(5,257		)
Other liabilities	(1,155		)	(354		)
Net cash provided by operating activities	319,575			360,057
Investing Activities:
Additions to utility plant	(197,957		)	(207,327		)
Payments received from transmission project joint funding partners	21,046			5,934
Proceeds from the sale of emission allowances and renewable energy certificates	2,562			1,892
Purchase of equity securities	(1,172		)	(3,248		)
Proceeds from the sale of equity securities	3,772			3,755
Other	1,182			2,905
Net cash used in investing activities	(170,567		)	(196,089		)
Financing Activities:
Issuance of long-term debt	220,000			—
Retirement of long-term debt	(130,000		)	(1,064		)
Dividends on common stock	(89,857		)	(83,478		)
Net change in short term borrowings	—			(21,800		)
Make-whole premium on retirement of long-term debt	(4,607		)	—
Debt issuance costs	(2,963		)	—
Net cash used in financing activities	(7,427		)	(106,342		)
Net increase in cash and cash equivalents	141,581			57,626
Cash and cash equivalents at beginning of the period	44,646			44,140
Cash and cash equivalents at end of the period	$	186,227		$	101,766
Supplemental Disclosure of Cash Flow Information:
Cash paid to (received from) IDACORP related to income taxes	$	35,505		$	(27,556	)
Cash paid for interest (net of amount capitalized)	$	61,790		$	60,208
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	$	22,715		$	23,502

The accompanying notes are an integral part of these statements.

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IDACORP, INC. AND IDAHO POWER COMPANY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

This Quarterly Report on Form 10-Q is a combined report of IDACORP, Inc. (IDACORP) and Idaho Power Company (Idaho Power). Therefore, these Notes to Condensed Consolidated Financial Statements apply to both IDACORP and Idaho Power. However, Idaho Power makes no representation as to the information relating to IDACORP’s other operations.

Nature of Business

IDACORP is a holding company formed in 1998 whose principal operating subsidiary is Idaho Power. Idaho Power is an electric utility engaged in the generation, transmission, distribution, sale, and purchase of electric energy and capacity with a service area covering approximately 24,000 square miles in southern Idaho and eastern Oregon. Idaho Power is regulated primarily by the state utility regulatory commissions of Idaho and Oregon and the Federal Energy Regulatory Commission (FERC). Idaho Power is the parent of Idaho Energy Resources Co. (IERCo), a joint venturer in Bridger Coal Company (BCC), which mines and supplies coal to the Jim Bridger generating plant owned in part by Idaho Power (Jim Bridger plant).

IDACORP’s significant other wholly-owned subsidiaries include IDACORP Financial Services, Inc. (IFS), an investor in affordable housing and other real estate investments, and Ida-West Energy Company (Ida-West), an operator of small hydroelectric generation projects that satisfy the requirements of the Public Utility Regulatory Policies Act of 1978 (PURPA).

Regulation of Utility Operations

As a regulated utility, many of Idaho Power's fundamental business decisions are subject to the approval of governmental agencies, including the prices that Idaho Power is authorized to charge for its electric service. These approvals are a critical factor in determining IDACORP's and Idaho Power's results of operations and financial condition.

IDACORP's and Idaho Power's financial statements reflect the effects of the different ratemaking principles followed by the jurisdictions regulating Idaho Power. The application of accounting principles related to regulated operations sometimes results in Idaho Power recording expenses and revenues in a different period than when an unregulated enterprise would record such expenses and revenues. In these instances, the amounts are deferred or accrued as regulatory assets or regulatory liabilities on the balance sheet. Regulatory assets represent incurred costs that have been deferred because it is probable they will be recovered from customers through future rates. Regulatory liabilities represent obligations to make refunds to customers for previous collections, or represent amounts collected in advance of incurring an expense. The effects of applying these regulatory accounting principles to Idaho Power's operations are discussed in more detail in Note 3 - "Regulatory Matters."

Financial Statements

In the opinion of management of IDACORP and Idaho Power, the accompanying unaudited condensed consolidated financial statements contain all adjustments necessary to present fairly each company's consolidated financial position as of September 30, 2018 , consolidated results of operations for the three and nine months ended September 30, 2018 and 2017 , and consolidated cash flows for the nine months ended September 30, 2018 and 2017 . These adjustments are of a normal and recurring nature. These financial statements do not contain the complete detail or footnote disclosure concerning accounting policies and other matters that would be included in full-year financial statements and should be read in conjunction with the audited consolidated financial statements included in IDACORP’s and Idaho Power’s Annual Report on Form 10-K for the year ended December 31, 2017 . The results of operations for the interim period are not necessarily indicative of the results to be expected for the full year. A change in management's estimates or assumptions could have a material impact on IDACORP's or Idaho Power's respective financial condition and results of operations during the period in which such change occurred.

Management Estimates

Management makes estimates and assumptions when preparing financial statements in conformity with generally accepted accounting principles. These estimates and assumptions include those related to rate regulation, retirement benefits, contingencies, asset impairment, income taxes, unbilled revenues, and bad debt. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates involve judgments

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with respect to, among other things, future economic factors that are difficult to predict and are beyond management's control. Accordingly, actual results could differ from those estimates.

New and Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606) . ASU 2014-09 is intended to enable users of financial statements to better understand and consistently analyze an entity's revenue across industries, transactions, and geographies. Under the ASU, recognition of revenue occurs when a customer obtains control of promised goods or services. In addition, the ASU requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The FASB amended certain aspects of ASU 2014-09 to clarify the implementation guidance, including clarifications related to principal versus agent considerations, licensing and identifying performance obligations, narrow scope improvements, and practical expedients. IDACORP and Idaho Power adopted ASU 2014-09 on January 1, 2018, using the modified-retrospective approach as provided for in the standard. The adoption did not change the timing or amounts of revenue currently recognized by the companies, so no cumulative-effect adjustment was required. The adoption did change presentation of revenues on the condensed consolidated statements of income and also added disclosures. To conform with current period presentation, electric utility revenues on IDACORP's and Idaho Power's condensed consolidated statements of income for the three and nine months ended September 30, 2018 and 2017, which had previously been reported separately as "General business," "Off-system sales," and "Other revenues," are no longer reported separately. See Note 4 - "Revenues" for additional information on the disaggregation of revenue and additional disclosures.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, which revises the accounting related to the classification and measurement of investments in equity securities and the presentation of certain fair value changes for financial liabilities measured at fair value. It also amends certain disclosure requirements associated with the fair value of financial instruments. The new standard is effective for fiscal years beginning after December 15, 2017, including interim periods. IDACORP and Idaho Power adopted ASU 2016-01 on January 1, 2018. The adoption did not have a material impact on the companies' financial statements as the companies previously elected the fair value option and reported available-for-sale securities at fair value.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments , to reduce diversity in practice in how certain cash receipts and cash payments are classified in the statement of cash flows. The companies' classification of proceeds from the settlement of corporate-owned life insurance policies and related costs will be classified as investing activities under the new guidance. The new guidance did not affect the companies' presentation of debt prepayment and extinguishment costs, proceeds from the settlement of insurance claims (other than corporate-owned life insurance), and distributions received from equity-method investments. IDACORP and Idaho Power adopted ASU 2016-15 on January 1, 2018, using the retrospective approach as provided for in the standard. To conform with current period presentation, the companies reclassified $3.0 million of company-owned life insurance proceeds received, for the nine months ended September 30, 2017, from "Change in accounts receivable" and $0.1 million of prepaid insurance premiums paid, for the nine months ended September 30, 2017, from “Change in other current assets” (net reclassification of $2.9 million ) within "Operating Activities" to "Other" within "Investing Activities" on the condensed consolidated statement of cash flows.

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In March 2017, the FASB issued ASU 2017-07, Compensation -- Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, which requires employers to disaggregate the service cost component from other components of net periodic benefit costs and to disclose the amounts of net periodic benefit costs that are included in each income statement line item. The standard requires employers to present the service cost component in the same line item as other compensation costs and to present the other components of net periodic benefit costs (which include interest costs, expected return on plan assets, amortization of prior service cost or credits, and actuarial gains and losses) separately and outside a subtotal of operating income. In addition, only the service cost component is eligible for capitalization. Idaho Power capitalizes amounts of pension or postretirement costs that are insignificant to the consolidated financial statements. The amendments in ASU 2017-07 are effective for interim and annual reporting periods beginning after December 15, 2017. Entities must use (1) a retrospective transition method to adopt the requirement for separate presentation in the income statement of service costs and other components and (2) a prospective transition method to adopt the requirement to limit the capitalization of benefit costs to the service cost component. IDACORP and Idaho Power adopted ASU 2017-07 on January 1, 2018, and accordingly, have retrospectively adjusted prior periods to reflect the disaggregation of service cost from other components of net periodic benefit costs. The adoption did not have a material impact on the companies' financial statements nor did it affect net income for the three and nine months ended September 30, 2018 . For IDACORP, for the three and nine months ended September 30, 2017 , $0.8 million and $2.3 million , respectively, were reclassified out of "Other operations and maintenance" and $2.0 million and $6.1 million , respectively, were reclassified out of "Other" operating expenses for a total of $2.8 million and $8.4 million , respectively, reclassified to "Other Income (Expense), Net" to conform to current period presentation. For Idaho Power, for the three and nine months ended September 30, 2017 , $0.8 million and $2.3 million , respectively, were reclassified from "Other operations and maintenance" to "Other expense, net" to conform to current period presentation.

Recent Accounting Pronouncements Not Yet Adopted

In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract ,

to provide guidance on implementation costs incurred in a cloud computing arrangement that is a service contract. ASU 2018-15 aligns the accounting for such costs with the guidance on capitalizing costs associated with developing or obtaining internal-use software. The new standard is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. IDACORP and Idaho Power are evaluating the impact of ASU 2018-15 on their respective financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), intended to improve financial reporting on leasing transactions. The ASU requires lessees to recognize a right-of-use asset and lease liability on the balance sheet for most leases. In addition, the ASU revises the definition of a lease in regards to when an arrangement conveys the right to control the use of the identified asset under the arrangement, which may result in changes to the classification of an arrangement as a lease. IDACORP and Idaho Power expect to adopt ASU 2016-02 on January 1, 2019. The standard must be adopted using a modified retrospective approach, but entities may elect not to recast the comparative periods. IDACORP and Idaho Power continue to finalize the process of identifying lease contracts and evaluating current business processes relating to leases, but the companies do not believe the adoption of ASU 2016-02 will have a material impact on their respective financial statements. The companies also continue to monitor utility industry lease implementation guidance and interpretation that may affect existing and future judgments relating to lease classification.

Reclassifications

In these condensed consolidated financial statements, certain amounts in prior periods’ consolidated financial statements have been reclassified to conform with current period presentation. On IDACORP's and Idaho Power's December 31, 2017 condensed consolidated balance sheets, the "Long-term receivables" balances of $4.3 million and $0.5 million , respectively, which had previously been reported separately, were reclassified to "Other" within "Other Assets" and "Deferred Debits," respectively.

2. INCOME TAXES

In accordance with interim reporting requirements, IDACORP and Idaho Power use an estimated annual effective tax rate for computing their provisions for income taxes. An estimate of annual income tax expense (or benefit) is made each interim period using estimates for annual pre-tax income, income tax adjustments, and tax credits. The estimated annual effective tax rates do not include discrete events such as tax law changes, examination settlements, accounting method changes, or adjustments to tax expense or benefits attributable to prior years. Discrete events are recorded in the interim period in which they occur or become known. The estimated annual effective tax rate is applied to year-to-date pre-tax income to determine income tax expense (or

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benefit) for the interim period consistent with the annual estimate. In subsequent interim periods, income tax expense (or benefit) for the period is computed as the difference between the year-to-date amount reported for the previous interim period and the current period's year-to-date amount.

Income Tax Expense

The following table provides a summary of income tax expense for the nine months ended September 30 (in thousands):



	IDACORP						Idaho Power
	2018			2017			2018			2017
Income tax at statutory rates (federal and state)	$	55,219		$	85,624		$	54,400		$	84,278
First mortgage bond redemption costs	(1,261		)	—			(1,261		)	—
Share-based compensation	(1,053		)	(1,587		)	(1,040		)	(1,558		)
Remeasurement of deferred taxes	(5,411		)	—			(5,664		)	—
Other ⁽¹⁾	(33,628		)	(38,617		)	(31,779		)	(36,367		)
Income tax expense	$	13,866		$	45,420		$	14,656		$	46,353
Effective tax rate	6.5		%	20.7		%	6.9		%	21.5		%

⁽¹⁾ "Other" is primarily comprised of the net tax effect of Idaho Power's regulatory flow-through tax adjustments.

The decreases in income tax expense for the nine months ended September 30, 2018 , compared with the same period in 2017 , were primarily due to lower statutory tax rates and a flow-through income tax benefit related to the tax deduction for bond redemption costs incurred in the second quarter of 2018. The decrease in statutory rates was due to the Tax Cuts and Jobs Act, which reduced the U.S. federal corporate income tax rate from 35 percent to 21 percent , and Idaho House Bill 463, which lowered the Idaho state corporate income tax rate from 7.4 percent to 6.925 percent . The federal and Idaho state income tax rate changes were effective January 1, 2018. The remeasurement of deferred taxes resulted from the federal and Idaho income tax rate change on the adjustment of temporary differences related to IDACORP’s 2017 consolidated income tax returns filed during the third quarter of 2018. On a net basis, Idaho Power’s estimate of its annual 2018 regulatory flow-through tax adjustments is comparable to 2017 .

3. REGULATORY MATTERS

Included below is a summary of Idaho Power's most recent general rate cases and base rate changes, as well as other recent or pending notable regulatory matters and proceedings.

Idaho and Oregon General Rate Cases

Idaho Power's current base rates are a result of orders from the Idaho Public Utilities Commission (IPUC) and Public Utility Commission of Oregon (OPUC). The commissions approve settlement stipulations that generally provide for cost recovery and an authorized rate of return on their respective Idaho-jurisdiction and Oregon-jurisdiction rate bases. Idaho Power's most recent general rate cases in Idaho and Oregon were filed during 2011, and Idaho Power filed a large single-issue rate case for the Langley Gulch power plant in Idaho and Oregon in 2012. These significant rate cases resulted in the resetting of base rates in both Idaho and Oregon during 2012. In 2014, Idaho Power reset its base-rate power supply expenses in the Idaho jurisdiction for purposes of updating the collection of costs through retail rates, but without a resulting net increase in rates.

Between general rate cases, Idaho Power relies upon customer growth, a fixed cost adjustment mechanism, power cost adjustment mechanisms, tariff riders, and other mechanisms to reduce the impact of regulatory lag, which refers to the period of time between making an investment or incurring an expense and recovering that investment or expense and earning a return. For more information on the Idaho and Oregon general rate cases and base rate adjustments, refer to Note 3 - "Regulatory Matters" to the consolidated financial statements included in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017.

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Idaho Settlement Stipulations

In October 2014, the IPUC issued an order approving an extension, with modifications, of the terms of a December 2011 Idaho settlement stipulation for the period from 2015 through 2019, or until the terms are otherwise modified or terminated by order of the IPUC (October 2014 Idaho Earnings Support and Sharing Settlement Stipulation). The provisions of the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation are described in the table included under "Income Tax Reform - Regulatory Treatment" below.

Based on its estimate of full-year 2018 return on year-end equity in the Idaho jurisdiction (Idaho ROE), in the third quarter of 2018, Idaho Power recorded a $1.5 million provision against current revenues for sharing of earnings with customers for 2018 under the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation. During the first nine months of 2017, Idaho Power recorded no sharing of earnings with customers.

Income Tax Reform - Regulatory Treatment

In January 2018, the IPUC issued an order requiring utilities within its jurisdiction, including Idaho Power, to file a report with the IPUC, identifying and quantifying the financial impact of the income tax reform changes on the utility, along with proposed tariff schedule changes that would adjust the utility's rates and corresponding revenues to reflect the utility's modified federal tax obligations under the Tax Cuts and Jobs Act. The IPUC order required Idaho Power to estimate the income tax reform changes by comparing actual 2017 federal income tax components with what those federal income tax components would have been if the Tax Cuts and Jobs Act had been effective for the full-year 2017.

In March 2018, Idaho Power made a filing with the IPUC providing the results of its pro forma analysis indicating pro forma annual income tax reform expense reductions, composed of a current income tax expense reduction and a deferred income tax expense reduction. In May 2018, the IPUC issued an order approving a settlement stipulation (May 2018 Idaho Tax Reform Settlement Stipulation) related to income tax reform. Beginning June 1, 2018, the settlement stipulation provides an annual (a) $18.7 million reduction to Idaho customer base rates and (b) $7.4 million amortization of existing regulatory deferrals for specified items or future amortization of other existing or future unspecified regulatory deferrals that would otherwise be a future liability recoverable from Idaho customers. Additionally, a one-time benefit of a $7.8 million rate reduction is being provided to Idaho customers throu gh the Idaho-jurisdiction power cost adjustment (PCA) mech anism for the period from June 1, 2018 through May 31, 2019, for the income tax reform benefits accrued from January 1, 2018 to May 31, 2018, and the income tax reform benefits related to Idaho Power's open access transmission tariff (OATT). The amount provided via the PCA mechanism will decrease to $2.7 million on June 1, 2019, for income tax reform benefits related to Idaho Power's OATT and will cease on June 1, 2020, to reflect the impact of a full year of reduced OATT third-party transmission revenues.

The May 2018 Idaho Tax Reform Settlement Stipulation also provides for the indefinite extension of the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation beyond its termination date of December 31, 2019.

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The table below summarizes and compares the terms of the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation with the terms in the May 2018 Idaho Tax Reform Settlement Stipulation that will be applicable commencing on January 1, 2020.



October 2014 Idaho Earnings Support and Sharing Settlement Stipulation (Effective through December 31, 2019)		May 2018 Idaho Tax Reform Settlement Stipulation (Effective beginning January 1, 2020, with no defined end date)
If Idaho Power's actual annual Idaho ROE in any year is less than 9.5 percent, then Idaho Power may record additional accumulated deferred investment tax credits (ADITC) amortization up to $25 million to help achieve a 9.5 percent Idaho ROE for that year, and may record additional ADITC amortization up to a total of $45 million over the 2015 through 2019 period. If the $45 million of ADITC are completely amortized, the revenue sharing provisions below would no longer be applicable.		If Idaho Power's actual annual Idaho ROE in any year is less than 9.4 percent, then Idaho Power may amortize up to $25 million of additional ADITC to help achieve a 9.4 percent Idaho ROE for that year, so long as the cumulative amount of ADITC used does not exceed $45 million (Idaho Power will have available and may continue to use any unused portion of the $45 million of additional ADITC from the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation); however, Idaho Power may seek approval from the IPUC to replenish the total amount of ADITC it is permitted to amortize. If there are no remaining amounts of ADITC authorized to be amortized, the revenue sharing provisions below would not be applicable until ADITC is replenished.
If Idaho Power's annual Idaho ROE in any year exceeds 10.0 percent, the amount of earnings exceeding a 10.0 percent Idaho ROE and up to and including a 10.5 percent Idaho ROE will be allocated 75 percent to Idaho Power's Idaho customers as a rate reduction to be effective at the time of the subsequent year's PCA, and 25 percent to Idaho Power.		If Idaho Power's annual Idaho ROE in any year exceeds 10.0 percent, the amount of earnings exceeding a 10.0 percent Idaho ROE and up to and including a 10.5 percent Idaho ROE will be allocated 80 percent to Idaho Power's Idaho customers as a rate reduction to be effective at the time of the subsequent year's PCA, and 20 percent to Idaho Power.
If Idaho Power's annual Idaho ROE in any year exceeds 10.5 percent, the amount of earnings exceeding a 10.5 percent Idaho ROE will be allocated 50 percent to Idaho Power's Idaho customers as a rate reduction to be effective at the time of the subsequent year's PCA, 25 percent to Idaho Power's Idaho customers in the form of a reduction to the pension regulatory asset balancing account (to reduce the amount to be collected in the future from Idaho customers), and 25 percent to Idaho Power.		If Idaho Power's annual Idaho ROE in any year exceeds 10.5 percent, the amount of earnings exceeding a 10.5 percent Idaho ROE will be allocated 55 percent to Idaho Power's Idaho customers as a rate reduction to be effective at the time of the subsequent year's PCA, 25 percent to Idaho Power's Idaho customers in the form of a reduction to the pension regulatory asset balancing account (to reduce the amount to be collected in the future from Idaho customers), and 20 percent to Idaho Power.
In the event the IPUC approves a change to Idaho Power's allowed annual Idaho ROE as part of a general rate case proceeding before December 31, 2019, the Idaho ROE thresholds will be adjusted on a prospective basis as follows: (a) the Idaho ROE under which Idaho Power will be permitted to amortize an additional amount of ADITC will be set at 95 percent of the newly authorized Idaho ROE, (b) sharing with customers on an 75 percent basis as a customer rate reduction will begin at the newly authorized Idaho ROE, and (c) sharing with customers on a 75 percent basis but allocated 50 percent to a rate reduction, and 25 percent to a pension expense deferral regulatory asset, will begin at 105 percent of the newly authorized Idaho ROE.		In the event the IPUC approves a change to Idaho Power's allowed annual Idaho ROE as part of a general rate case proceeding effective on or after January 1, 2020, the Idaho ROE thresholds will be adjusted on a prospective basis as follows: (a) the Idaho ROE under which Idaho Power will be permitted to amortize an additional amount of ADITC will be set at 95 percent of the newly authorized Idaho ROE, (b) sharing with customers on an 80 percent basis as a customer rate reduction will begin at the newly authorized Idaho ROE, and (c) sharing with customers on an 80 percent basis but allocated 55 percent to a rate reduction, and 25 percent to a pension expense deferral regulatory asset, will begin at 105 percent of the newly authorized Idaho ROE.

Neither the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation nor the May 2018 Idaho Tax Reform Settlement Stipulation impose a moratorium on Idaho Power filing a general rate case or other form of rate proceeding in Idaho during their respective terms.

Also in May 2018, the OPUC issued an order approving a settlement stipulation that provides for an annual $1.5 million reduction to Oregon customer base rates beginning June 1, 2018, through May 31, 2020, related to income tax reform. Unless resolved in a regulatory proceeding before, the settlement stipulation requires Idaho Power to file a deferral request with the OPUC by December 31, 2019, to begin tracking tax reform benefits beginning January 1, 2020, at which time Idaho Power, the OPUC staff, and other interested parties will discuss the methodology to quantify potential future tax reform benefits. The settlement stipulation also deemed prudent Idaho Power's decision to pursue the end of its participation in coal-fired operations of Unit 1 at Idaho Power's jointly-owned Valmy Plant and approved Idaho Power's request to recover annual incremental accelerated depreciation of $2.5 million relating to Unit 1, beginning June 1, 2018, and ending December 31, 2019.

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Hells Canyon Complex Relicensing Costs Settlement Stipulation

In December 2016, Idaho Power filed an application with the IPUC requesting a determination that Idaho Power's expenditures of $220.8 million through year-end 2015 on relicensing of the Hells Canyon Complex (HCC) were prudently incurred, and thus eligible for inclusion in retail rates in a future regulatory proceeding. In December 2017, Idaho Power filed with the IPUC a settlement stipulation signed by Idaho Power, the IPUC staff, and a third party intervenor, recognizing that a total of $216.5 million in HCC relicensing expenditures and other related costs were reasonably incurred, and therefore should be eligible for inclusion in customer rates at a later date. As a result of filing the settlement stipulation, Idaho Power recorded a $5.0 million pre-tax charge in the fourth quarter of 2017, which included $4.3 million for costs incurred through 2015, as well as $0.7 million related to associated costs incurred in 2016 and 2017. In April 2018, the IPUC issued an order approving the settlement stipulation as filed with the IPUC and determined the $216.5 million of associated costs to be reasonably and prudently incurred.

Idaho Power Cost Adjustment Mechanisms

In both its Idaho and Oregon jurisdictions, Idaho Power's power cost adjustment mechanisms address the volatility of power supply costs and provide for annual adjustments to the rates charged to its retail customers. The power cost adjustment mechanisms compare Idaho Power's actual net power supply costs (primarily fuel and purchased power less wholesale energy sales) against net power supply costs being recovered in Idaho Power's retail rates. Under the power cost adjustment mechanisms, certain differences between actual net power supply costs incurred by Idaho Power and costs being recovered in retail rates are recorded as a deferred charge or credit on the balance sheet for future recovery or refund. The power supply costs deferred primarily result from changes in contracted power purchase prices and volumes, changes in wholesale market prices and transaction volumes, fuel prices, and the levels of Idaho Power's own generation.

In June 2018, the IPUC issued an order approving a $22.6 million net decrease in PCA rates, effective for the 2018-2019 PCA collection period from June 1, 2018, to May 31, 2019. The net decrease in PCA rates is primarily due to better-than-expected actual water conditions for the 2017-2018 PCA year, which resulted in additional low-cost hydroelectric generation available to reduce net power supply costs. Previously, in May 2017, the IPUC issued an order approving a $10.6 million net increase in PCA rates, effective for the 2017-2018 PCA collection period from June 1, 2017, to May 31, 2018. The net increase in PCA rates was primarily due to expected higher power supply costs resulting from new renewable energy power purchase agreements under PURPA and higher coal-fired generation costs, combined with the effect of lower-than-expected actual hydroelectric generation for the 2016-2017 PCA year. The net increase included an offsetting $13.0 million one-time refund of previously collected Idaho energy efficiency rider funds.

Idaho Fixed Cost Adjustment Mechanism

The Idaho jurisdiction fixed cost adjustment (FCA) mechanism is designed to remove a portion of Idaho Power’s financial disincentive to invest in energy efficiency programs by separating (or decoupling) the recovery of fixed costs from the variable kilowatt-hour charge and instead linking it to a set amount per customer. The FCA mechanism, applicable to residential and small commercial customers, is adjusted each year to accrue, or defer, the difference between the authorized fixed-cost recovery amount per customer and the actual fixed costs per customer recovered by Idaho Power during the year. In May 2018, the IPUC issued an order approving a decrease of $19.4 million in the FCA from $35.0 million to $15.6 million , with new rates effective for the period from June 1, 2018, to May 31, 2019. Previously, in May 2017, the IPUC issued an order approving an increase of $6.9 million in the FCA from $28.1 million to $35.0 million , with rates effective for the period from June 1, 2017, to May 31, 2018.

Western Energy Imbalance Market Costs

Idaho Power's participation in the energy imbalance market implemented in the western United States (Western EIM) commenced on April 4, 2018. The Western EIM aims to reduce the power supply costs to serve customers through more efficient dispatch within the hour of a larger and more diverse pool of resources, to integrate intermittent power from renewable generation sources more effectively, and to enhance reliability.

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In January 2017, the IPUC issued an order authorizing deferral accounting treatment for costs associated with joining the Western EIM. In November 2017, Idaho Power filed an application with the IPUC requesting authorization to establish an interim method of recovery for costs associated with participation in the Western EIM. Through March 2018, Idaho Power had deferred $1.0 million of incremental other operations and maintenance (O&M) costs. In the second quarter of 2018, Idaho Power amortized those costs in accordance with the provisions of the May 2018 Idaho Tax Reform Settlement Stipulation discussed above.

In July 2018, the IPUC issued an order approving a settlement stipulation that provides for recovery of ongoing Western EIM-related costs through Idaho Power's PCA mechanism, beginning April 2018. The recovery mechanism provides for monthly incremental revenue, which includes a return on and return of Western EIM-related capital costs and recovery of ongoing Western EIM operating costs. As of April 1, 2018, Idaho Power ceased deferring incremental Western EIM participation O&M start-up costs, and began recognizing the monthly incremental revenue associated with Western EIM participation. During the three and nine months ended September 30, 2018 , Idaho Power recorded $0.7 million and $1.4 million of revenue, respectively, relating to Western EIM participation and deferred the same amount to the PCA deferral account.

4. REVENUES

On January 1, 2018, IDACORP and Idaho Power adopted ASU 2014-09 using the modified retrospective method. The adoption did not change the timing or amounts of revenue recognized by IDACORP or Idaho Power and, therefore, the companies recorded no cumulative-effect adjustment. The following table provides a summary of electric utility operating revenues for IDACORP and Idaho Power for the three and nine months ended September 30 , 2018 and 2017 (in thousands):



	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Electric utility operating revenues:
Revenue from contracts with customers	$	398,798	$	405,697	$	1,019,668	$	1,025,779
Alternative revenue programs and other revenues	8,557		958		35,847		14,608
Total electric utility operating revenues	$	407,355	$	406,655	$	1,055,515	$	1,040,387

Revenues from Contracts with Customers

Revenues from contracts with customers are primarily related to Idaho Power’s regulated tariff-based sales of energy or related services. Generally, tariff-based sales do not involve a written contract, but are classified as revenues from contracts with customers under ASU 2014-09. Idaho Power assesses revenues on a contract-by-contract basis to determine the nature, amount, timing, and uncertainty, if any, of revenues being recognized. The following table presents revenues from contracts with

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customers disaggregated by revenue source for the three and nine months ended September 30 , 2018 and 2017 (in thousands):



	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Revenues from contracts with customers:
Retail revenues:
Residential (includes $4,789, ($264), $23,841, and $8,068, respectively, related to the FCA ⁽¹⁾ )	$	137,177		$	145,555		$	393,014		$	410,246
Commercial (includes $305, $220, $958, and $606, respectively, related to the FCA ⁽¹⁾ )	85,936			89,305			237,127			242,564
Industrial	50,292			52,771			144,951			147,995
Irrigation	88,934			89,370			154,406			146,363
Provision for sharing	(1,500		)	—			(1,500		)	—
Deferred revenue related to HCC relicensing AFUDC ⁽²⁾	(2,815		)	(3,432		)	(6,861		)	(8,366		)
Total retail revenues	358,024			373,569			921,137			938,802
Less: FCA mechanism revenues ⁽¹⁾	(5,094		)	44			(24,799		)	(8,674		)
Wholesale energy sales	12,408			5,101			35,093			18,061
Transmission services (wheeling) revenues	17,640			10,805			43,839			32,637
Energy efficiency program revenues	9,309			9,883			25,708			26,726
Other revenues from contracts with customers	6,511			6,295			18,690			18,227
Total revenues from contracts with customers	$	398,798		$	405,697		$	1,019,668		$	1,025,779

⁽¹⁾ The FCA mechanism is an alternative revenue program and does not represent revenue from contracts with customers.

⁽²⁾ As part of its January 30, 2009 general rate case order, the IPUC is allowing Idaho Power to recover a portion of the allowance for funds used during construction (AFUDC) on construction work in progress related to the HCC relicensing process, even though the relicensing process is not yet complete and the costs have not been moved to electric plant in service. Idaho Power is collecting $8.8 million annually in the Idaho jurisdiction but is deferring revenue recognition of the amounts collected until the license is issued and the accumulated license costs approved for recovery are placed in service. Prior to the May 2018 Idaho Tax Reform Settlement Stipulation described in Note 3 - "Regulatory Matters," Idaho Power was collecting $10.7 million annually.

Retail Revenues: Idaho Power’s retail revenues primarily relate to the sale of electricity to customers based on regulated tariff-based prices. Idaho Power recognizes retail revenues in amounts for which it has the right to invoice the customer in the period when energy is delivered or services are provided to customers. The total energy price generally has a fixed component related to having service available and a usage-based component related to the demand, delivery, and consumption of energy. The revenues recognized reflect the consideration Idaho Power expects to be entitled to in exchange for that energy or those services. Retail customers are classified as residential, commercial, industrial, or irrigation. Approximately 95 percent of Idaho Power's retail revenue originates from customers located in Idaho, with the remainder originating from customers located in Oregon. Idaho Power’s retail customer rates are based on Idaho Power’s cost of service and are determined through general rate case proceedings, settlement stipulations, and other filings with the IPUC and OPUC. Changes in rates and changes in customer demand are typically the primary causes of fluctuations in retail revenue from period to period. The primary influences on changes in customer demand for electricity are weather, economic conditions (including growth in the number of Idaho Power customers), and energy efficiency. Idaho Power's utility revenues are not earned evenly during the year.

Retail revenues are billed monthly based on meter readings taken throughout the month. Payments for amounts billed are generally due from the customer within 15 days of billing. Idaho Power accrues estimated unbilled revenues for energy or related services delivered to customers but not yet billed at period-end based on actual meter readings at period-end and estimated rates.

Credit losses recorded on receivables arising from Idaho Power’s contracts with customers were $1.2 million and $3.0 million for the three and nine months ended September 30, 2018 , respectively, and $1.2 million and $3.7 million for the three and nine months ended September 30, 2017 , respectively.

Residential Customers : Idaho Power’s energy sales to residential customers typically peak during the winter heating season and summer cooling season. Extreme temperatures increase sales to residential customers who use electricity for cooling and heating, compared with normal temperatures. Idaho Power's rate structure provides for higher rates during the summer when overall system loads are at their highest, and includes tiers such that rates increase as a customer's consumption level increases. These seasonal and tiered rate structures contribute to the seasonal fluctuations in revenues and earnings. Economic and demographic conditions can also affect residential customer demand; strong job growth and population growth in Idaho

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Power’s service area have led to increasing customer growth rates in recent years. Residential demand is also impacted by energy efficiency initiatives. Idaho Power’s FCA mechanism mitigates some of the fluctuations caused by weather and energy efficiency initiatives.

Commercial Customers : Most businesses are included in Idaho Power's commercial customer class, as well as small industrial companies, and public street and highway lighting accounts. Idaho Power’s commercial customers are less influenced by weather conditions than residential customers, although weather does affect commercial customer energy use. Economic conditions, including manufacturing activity levels, and energy efficiency initiatives also affect energy use of commercial customers.

Industrial Customers : Industrial customers consist of large industrial companies, including special contract customers. Energy use of industrial customers is primarily driven by economic conditions, with weather having little impact on this customer class.

Irrigation Customers : Irrigation customers use electricity to operate irrigation pumps, primarily during the agricultural growing season. The amount and timing of precipitation as well as temperature levels can affect the timing and amounts of sales to irrigation customers, with increased precipitation generally resulting in decreased sales.

Provision for Sharing : Based on its estimate of full-year 2018 Idaho ROE, in the third quarter of 2018, Idaho Power recorded a $1.5 million provision against current revenues for sharing of earnings with customers for 2018 under the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation. During the first nine months of 2017, Idaho Power recorded no sharing of earnings with customers. The October 2014 Idaho Earnings Support and Sharing Settlement Stipulation is described further in Note 3 - "Regulatory Matters."

Wholesale Energy Sales: As a public utility under the Federal Power Act (FPA), Idaho Power has the authority to charge market-based rates for wholesale energy sales under its FERC tariff. Idaho Power’s wholesale electricity sales are primarily to utilities and power marketers and are predominantly short-term and consist of a single performance obligation satisfied as energy is transferred to the counterparty. Idaho Power's wholesale energy sales depend largely on the availability of generation resources in excess of the amount necessary to serve customer loads as well as adequate market power prices at the time when those resources are available. A reduction in either factor may lead to lower wholesale energy sales.

Transmission Services (Wheeling) Revenues: As a public utility under the FPA, Idaho Power has the authority to provide cost-based wholesale and retail access transmission services under its OATT. Services under the OATT are offered on a nondiscriminatory basis such that all potential customers have an equal opportunity to access the transmission system. Idaho Power’s transmission revenue is primarily related to third parties reserving capacity on Idaho Power’s transmission system to transmit electricity through Idaho Power’s service area. The reservations are predominantly short-term but may be part of a long-term capacity contract, short-term contract, or on demand when available. Transmission services revenues consist of a single performance obligation satisfied as capacity on Idaho Power’s transmission system is provided to the third party. Transmission service revenues are affected by changes in Idaho Power’s OATT transmission rate and customer demand. Demand for transmission services can be affected by regional market factors, such as loads and generation of utilities in Idaho Power’s region.

Energy Efficiency Program Revenues: Idaho Power collects most of its energy efficiency program costs through an energy efficiency rider on customer bills. The rider collections are deferred until expenditures are incurred. Energy efficiency program expenditures funded through the rider are reported as an operating expense with an equal amount recorded in revenues, resulting in no net impact on earnings. Energy efficiency program revenues are recognized in the period when the related costs of the energy efficiency program are incurred by Idaho Power. The cumulative variance between expenditures and amounts collected through the rider is recorded as a regulatory asset or liability. A liability balance indicates that Idaho Power has collected more than it has spent, and an asset balance indicates that Idaho Power has spent more than it has collected. At September 30, 2018 , Idaho Power's energy efficiency rider balances were a $6.8 million regulatory liability in the Idaho jurisdiction and a $6.7 million regulatory asset in the Oregon jurisdiction.

Alternative Revenue Programs and Other Revenues

While revenues from contracts with customers make up most of Idaho Power’s revenues, the IPUC has authorized the use of an additional regulatory mechanism, which may increase or decrease tariff-based rates billed to customers. The Idaho FCA mechanism, applicable to residential and small commercial customers, is designed to remove a portion of Idaho Power’s financial disincentive to invest in energy efficiency programs by separating (or decoupling) the recovery of fixed costs from the variable kilowatt-hour charge and linking it instead to a set amount per customer. Under Idaho Power's current rate design, recovery of a portion of fixed costs is included in the variable kilowatt-hour charge, which may result in overcollection or

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undercollection of fixed costs. To return overcollection to customers or to collect undercollection from customers, the FCA mechanism allows Idaho Power to accrue, or defer, the difference between the authorized fixed-cost recovery amount per customer and the actual fixed costs per customer recovered by Idaho Power during the year. Increases in FCA recovery are capped at 3 percent of base revenue annually, with any excess deferred for collection in a subsequent year.

The FCA mechanism revenues include only the initial recognition of FCA revenues when the regulator-specified conditions for recognition have been met. Revenue from contracts with customers excludes the portion of the tariff price representing FCA revenues that had been initially recorded in prior periods when regulator-specified conditions were met. When those amounts are included in the price of utility service and billed to customers, such amounts are recorded as recovery of the associated regulatory asset or liability and not as revenues.

The table below presents the FCA mechanism revenues and other revenues for the three and nine months ended September 30 , 2018 and 2017 (in thousands):



	Three months ended September 30,					Nine months ended September 30,
	2018		2017			2018		2017
Alternative revenue programs and other revenues:
FCA mechanism revenues	$	5,094	(44		)	$	24,799	$	8,674
Derivative revenues	3,463		1,002			11,048		5,934
Total alternative revenue programs and other revenues	$	8,557	$	958		$	35,847	$	14,608

IDACORP's Other Revenues

IDACORP's other revenues are primarily comprised of revenues from IDACORP’s subsidiary, Ida-West. Ida-West operates small hydroelectric generation projects that satisfy the requirements of PURPA.

5. LONG-TERM DEBT

In March 2018, Idaho Power issued $220 million in principal amount of 4.20 percent first mortgage bonds, secured medium-term notes, Series K, maturing on March 1, 2048. In April 2018, Idaho Power redeemed, prior to maturity, $130 million in principal amount of 4.50 percent first mortgage bonds, medium-term notes, Series H due March 2020. In accordance with the redemption provisions of the notes, the redemption included Idaho Power's payment of a make-whole premium to the holders of the redeemed notes in the aggregate amount of $4.6 million . Idaho Power used a portion of the net proceeds from the March 2018 sale of first mortgage bonds, medium-term notes to effect the redemption.

As of September 30, 2018 , $280 million in principal amount of long-term debt securities remained available for issuance under a selling agency agreement executed on September 27, 2016, and pursuant to state regulatory authority.

6. COMMON STOCK

IDACORP Common Stock

During the nine months ended September 30, 2018 , IDACORP granted 75,761 restricted stock unit awards to employees and 12,950 shares of common stock to directors but made no original issuances of shares of common stock pursuant to the IDACORP, Inc. 2000 Long-Term Incentive and Compensation Plan. As directed by IDACORP, plan administrators of the IDACORP, Inc. Dividend Reinvestment and Stock Purchase Plan and Idaho Power Company Employee Savings Plan use market purchases of IDACORP common stock, as opposed to original issuance of common stock from IDACORP, to acquire shares of IDACORP common stock for the plans. However, IDACORP may determine at any time to use original issuances of common stock under those plans.

Restrictions on Dividends

Idaho Power’s ability to pay dividends on its common stock held by IDACORP and IDACORP’s ability to pay dividends on its common stock are limited to the extent payment of such dividends would violate the covenants in their respective credit facilities or Idaho Power’s Revised Code of Conduct. A covenant under IDACORP’s credit facility and Idaho Power’s credit facility requires IDACORP and Idaho Power to maintain leverage ratios of consolidated indebtedness to consolidated total capitalization, as defined therein, of no more than 65 percent at the end of each fiscal quarter. At September 30, 2018 , the

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leverage ratios for IDACORP and Idaho Power were 44 percent and 46 percent , respectively. Based on these restrictions, IDACORP’s and Idaho Power’s dividends were limited to $1.4 billion and $1.2 billion , respectively, at September 30, 2018 . There are additional facility covenants, subject to exceptions, that prohibit or restrict the sale or disposition of property without consent and any agreements restricting dividend payments to IDACORP and Idaho Power from any material subsidiary. At September 30, 2018 , IDACORP and Idaho Power were in compliance with those financial covenants.

Idaho Power’s Revised Code of Conduct relating to transactions between and among Idaho Power, IDACORP, and other affiliates, which was approved by the IPUC in April 2008, provides that Idaho Power will not pay any dividends to IDACORP that will reduce Idaho Power’s common equity capital below 35 percent of its total adjusted capital without IPUC approval. At September 30, 2018 , Idaho Power's common equity capital was 54 percent of its total adjusted capital. Further, Idaho Power must obtain approval from the OPUC before it can directly or indirectly loan funds or issue notes or give credit on its books to IDACORP.

Idaho Power’s articles of incorporation contain restrictions on the payment of dividends on its common stock if preferred stock dividends are in arrears. As of the date of this report, Idaho Power has no preferred stock outstanding.

In addition to contractual restrictions on the amount and payment of dividends, the FPA prohibits the payment of dividends from "capital accounts." The term "capital account" is undefined in the FPA or its regulations, but Idaho Power does not believe the restriction would limit Idaho Power's ability to pay dividends out of current year earnings or retained earnings.

7. EARNINGS PER SHARE

The table below presents the computation of IDACORP’s basic and diluted earnings per share for the three and nine months ended September 30, 2018 and 2017 (in thousands, except for per share amounts).



	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Numerator:
Net income attributable to IDACORP, Inc.	$	102,231	$	90,634	$	200,661	$	173,567
Denominator:
Weighted-average common shares outstanding - basic	50,434		50,362		50,431		50,361
Effect of dilutive securities	131		59		72		47
Weighted-average common shares outstanding - diluted	50,565		50,421		50,503		50,408
Basic earnings per share	$	2.03	$	1.80	$	3.98	$	3.45
Diluted earnings per share	$	2.02	$	1.80	$	3.97	$	3.44

8. COMMITMENTS

Purchase Obligations

IDACORP's and Idaho Power's purchase obligations did not change materially, outside of the ordinary course of business, during the nine months ended September 30, 2018 , except that Idaho Power entered into agreements with solar, biomass, and hydro PURPA-qualifying facilities, which increased contractual payment obligations by approximately $57 million over the 20-year terms of the contracts.

Guarantees

Through a self-bonding mechanism, Idaho Power guarantees its portion of reclamation activities and obligations at BCC, of which IERCo owns a one-third interest. This guarantee, which is renewed annually with the Wyoming Department of Environmental Quality, was $58.4 million at September 30, 2018 , representing IERCo's one-third share of BCC's total reclamation obligation of $175.2 million . BCC has a reclamation trust fund set aside specifically for the purpose of paying these reclamation costs. At September 30, 2018 , the value of BCC's reclamation trust fund was $111.0 million . During the nine months ended September 30, 2018 , the reclamation trust fund made distributions of $6.7 million for reclamation activity costs associated with the BCC surface mine. BCC periodically assesses the adequacy of the reclamation trust fund and its estimate of future reclamation costs. To ensure that the reclamation trust fund maintains adequate reserves, BCC has the ability to, and

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does, add a per-ton surcharge to coal sales, all of which are made to the Jim Bridger plant. Because of the existence of the fund and the ability to apply a per-ton surcharge, the estimated fair value of this guarantee is minimal.

IDACORP and Idaho Power enter into financial agreements and power purchase and sale agreements that include indemnification provisions relating to various forms of claims or liabilities that may arise from the transactions contemplated by these agreements. Generally, a maximum obligation is not explicitly stated in the indemnification provisions and, therefore, the overall maximum amount of the obligation under such indemnification provisions cannot be reasonably estimated. IDACORP and Idaho Power periodically evaluate the likelihood of incurring costs under such indemnities based on their historical experience and the evaluation of the specific indemnities. As of September 30, 2018 , management believes the likelihood is remote that IDACORP or Idaho Power would be required to perform under such indemnification provisions or otherwise incur any significant losses with respect to such indemnification obligations. Neither IDACORP nor Idaho Power has recorded any liability on their respective condensed consolidated balance sheets with respect to these indemnification obligations.

9. CONTINGENCIES

IDACORP and Idaho Power have in the past and expect in the future to become involved in various claims, controversies, disputes, and other contingent matters, some of which involve litigation and regulatory or other contested proceedings. The ultimate resolution and outcome of litigation and regulatory proceedings is inherently difficult to determine, particularly where (a) the remedies or penalties sought are indeterminate, (b) the proceedings are in the early stages or the substantive issues have not been well developed, or (c) the matters involve complex or novel legal theories or a large number of parties. In accordance with applicable accounting guidance, IDACORP and Idaho Power, as applicable, establish an accrual for legal proceedings when those matters proceed to a stage where they present loss contingencies that are both probable and reasonably estimable. If the loss contingency at issue is not both probable and reasonably estimable, IDACORP and Idaho Power do not establish an accrual and the matter will continue to be monitored for any developments that would make the loss contingency both probable and reasonably estimable. As of the date of this report, IDACORP's and Idaho Power's accruals for loss contingencies are not material to their financial statements as a whole; however, future accruals could be material in a given period. IDACORP's and Idaho Power's determination is based on currently available information, and estimates presented in financial statements and other financial disclosures involve significant judgment and may be subject to significant uncertainty. For matters that affect Idaho Power’s operations, Idaho Power intends to seek, to the extent permissible and appropriate, recovery through the ratemaking process of costs incurred.

IDACORP and Idaho Power are parties to legal claims and legal and regulatory actions and proceedings in the ordinary course of business and, as noted above, record an accrual for associated loss contingencies when they are probable and reasonably estimable. As of the date of this report, the companies believe that resolution of those matters will not have a material adverse effect on their respective consolidated financial statements. Idaho Power is also actively monitoring various pending environmental regulations and executive orders related to environmental matters that may have a significant impact on its future operations. Given uncertainties regarding the outcome, timing, and compliance plans for these environmental matters, Idaho Power is unable to estimate the financial impact of these regulations.

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10. BENEFIT PLANS

Idaho Power has a noncontributory defined benefit pension plan (pension plan) and two nonqualified defined benefit plans for certain senior management employees called the Security Plan for Senior Management Employees I and Security Plan for Senior Management Employees II (collectively, SMSP). Idaho Power also has a nonqualified defined benefit pension plan for directors that was frozen in 2002. Remaining vested benefits from that plan are included with the SMSP in the disclosures below. The benefits under the pension plan are based on years of service and the employee’s final average earnings. Idaho Power also maintains a defined benefit postretirement benefit plan (consisting of health care and death benefits) that covers all employees who were enrolled in the active-employee group plan at the time of retirement as well as their spouses and qualifying dependents. The table below shows the components of net periodic benefit costs for the pension, SMSP, and postretirement benefits plans for the three months ended September 30, 2018 and 2017 (in thousands).



	Pension Plan						SMSP					Postretirement Benefits						Total
	2018			2017			2018			2017		2018			2017			2018			2017
Service cost	$	8,892		$	8,436		$	(79	)	$	189	$	263		$	245		$	9,076		$	8,870
Interest cost	9,761			9,739			1,062			1,079		660			695			11,483			11,513
Expected return on plan assets	(13,117		)	(11,285		)	—			—		(616		)	(576		)	(13,733		)	(11,861		)
Amortization of prior service cost	1			7			24			31		11			11			36			49
Amortization of net loss	3,381			3,298			947			742		—			—			4,328			4,040
Net periodic benefit cost	8,918			10,195			1,954			2,041		318			375			11,190			12,611
Regulatory deferral of net periodic benefit cost ⁽¹⁾	(8,498		)	(9,708		)	—			—		—			—			(8,498		)	(9,708		)
Previously deferred pension costs recognized ⁽¹⁾	4,288			4,288			—			—		—			—			4,288			4,288
Net periodic benefit cost recognized for financial reporting ⁽¹⁾⁽²⁾	$	4,708		$	4,775		$	1,954		$	2,041	$	318		$	375		$	6,980		$	7,191

⁽¹⁾ Net periodic benefit costs for the pension plan are recognized for financial reporting based upon the authorization of each regulatory jurisdiction in which Idaho Power operates. Under IPUC order, the Idaho portion of net periodic benefit cost is recorded as a regulatory asset and is recognized in the income statement as those costs are recovered through rates.

⁽²⁾ Of total net periodic benefit cost recognized for financial reporting, $4.1 million and $4.4 million , respectively, was recognized in "Other operations and maintenance" and $2.9 million and $2.8 million , respectively, was recognized in "Other expense, net" on the condensed consolidated statements of income of the companies for the three months ended September 30, 2018 and 2017 .

The table below shows the components of net periodic benefit costs for the pension, SMSP, and postretirement benefits plans for the nine months ended September 30, 2018 and 2017 (in thousands).



	Pension Plan						SMSP					Postretirement Benefits						Total
	2018			2017			2018			2017		2018			2017			2018			2017
Service cost	$	28,377		$	25,307		$	(237	)	$	569	$	789		$	731		$	28,929		$	26,607
Interest cost	29,125			29,217			3,186			3,236		1,982			2,087			34,293			34,540
Expected return on plan assets	(39,227		)	(33,854		)	—			—		(1,850		)	(1,730		)	(41,077		)	(35,584		)
Amortization of prior service cost	4			21			73			95		35			35			112			151
Amortization of net loss	10,169			9,893			2,841			2,223		—			—			13,010			12,116
Net periodic benefit cost	28,448			30,584			5,863			6,123		956			1,123			35,267			37,830
Regulatory deferral of net periodic benefit cost ⁽¹⁾	(27,114		)	(28,991		)	—			—		—			—			(27,114		)	(28,991		)
Previously deferred pension costs recognized ⁽¹⁾	12,865			12,865			—			—		—			—			12,865			12,865
Net periodic benefit cost recognized for financial reporting ⁽¹⁾⁽²⁾	$	14,199		$	14,458		$	5,863		$	6,123	$	956		$	1,123		$	21,018		$	21,704

⁽²⁾ Of total net periodic benefit cost recognized for financial reporting, $12.3 million and $13.3 million , respectively, was recognized in "Other operations and maintenance" and $8.7 million and $8.4 million , respectively, was recognized in "Other expense, net" on the condensed consolidated statements of income of the companies for the nine months ended September 30, 2018 and 2017 .

Idaho Power has no minimum contribution requirement to its defined benefit pension plan in 2018. However, during the nine months ended September 30, 2018 , Idaho Power made $40 million of discretionary contributions to its defined benefit pension plan, which was applied to IDACORP's 2017 tax return. Idaho Power's contributions are made in a continued effort to balance the regulatory collection of these expenditures with the amount and timing of contributions and to mitigate the cost of being in

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an underfunded position. The primary impact of pension contributions is on the timing of cash flows, as the timing of cost recovery lags behind contributions.

Idaho Power also has an Employee Savings Plan that complies with Section 401(k) of the Internal Revenue Code and covers substantially all employees. Idaho Power matches specified percentages of employee contributions to the Employee Savings Plan.

11. DERIVATIVE FINANCIAL INSTRUMENTS

Commodity Price Risk

Idaho Power is exposed to market risk relating to electricity, natural gas, and other fuel commodity prices, all of which are heavily influenced by supply and demand. Market risk may be influenced by market participants’ nonperformance of their contractual obligations and commitments, which affects the supply of or demand for the commodity. Idaho Power uses derivative instruments, such as physical and financial forward contracts, for both electricity and fuel to manage the risks relating to these commodity price exposures. The primary objectives of Idaho Power’s energy purchase and sale activity are to meet the demand of retail electric customers, maintain appropriate physical reserves to ensure reliability, and make economic use of temporary surpluses that may develop.

All of Idaho Power's derivative instruments have been entered into for the purpose of economically hedging forecasted purchases and sales, though none of these instruments have been designated as cash flow hedges. Idaho Power offsets fair value amounts recognized on its balance sheet and applies collateral related to derivative instruments executed with the same counterparty under the same master netting agreement. Idaho Power does not offset a counterparty's current derivative contracts with the counterparty's long-term derivative contracts, although Idaho Power's master netting arrangements would allow current and long-term positions to be offset in the event of default. Also, in the event of default, Idaho Power's master netting arrangements would allow for the offsetting of all transactions executed under the master netting arrangement. These types of transactions may include non-derivative instruments, derivatives qualifying for scope exceptions, receivables and payables arising from settled positions, and other forms of non-cash collateral (such as letters of credit). These types of transactions are excluded from the offsetting presented in the derivative fair value and offsetting table that follows.

The table below presents the gains and losses on derivatives not designated as hedging instruments for the three and nine months ended September 30, 2018 and 2017 (in thousands).



		Gain/(Loss) on Derivatives Recognized in Income ⁽¹⁾
	Location of Realized Gain/(Loss) on Derivatives Recognized in Income	Three months ended September 30,						Nine months ended September 30,
		2018			2017			2018			2017
Financial swaps	Operating revenues	$	(98	)	$	(309	)	$	168		$	864
Financial swaps	Purchased power	6,793			904			6,604			169
Financial swaps	Fuel expense	95			883			(704		)	1,549
Financial swaps	Other operations and maintenance	47			(45		)	85			(126		)
Forward contracts	Operating revenues	20			—			22			—
Forward contracts	Purchased power	(20		)	(3		)	(40		)	(13		)
Forward contracts	Fuel expense	6			—			30			3

⁽¹⁾ Excludes unrealized gains or losses on derivatives, which are recorded on the balance sheet as regulatory assets or regulatory liabilities.

Settlement gains and losses on electricity swap contracts are recorded on the income statement in revenues from contracts with customers or purchased power depending on the forecasted position being economically hedged by the derivative contract. Settlement gains and losses on contracts for natural gas are reflected in fuel expense. Settlement gains and losses on diesel derivatives are recorded in other operations and maintenance expense. See Note 12 - "Fair Value Measurements" for additional information concerning the determination of fair value for Idaho Power’s assets and liabilities from price risk management activities.

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Derivative Instrument Summary

The table below presents the fair values and locations of derivative instruments not designated as hedging instruments recorded on the balance sheets and reconciles the gross amounts of derivatives recognized as assets and as liabilities to the net amounts presented in the balance sheets at September 30, 2018 , and December 31, 2017 (in thousands).



		Asset Derivatives							Liability Derivatives
	Balance Sheet Location	Gross Fair Value		Amounts Offset			Net Assets		Gross Fair Value		Amounts Offset				Net Liabilities
	Balance Sheet Location	Gross Fair Value		Amounts Offset			Net Assets		Gross Fair Value		Amounts Offset				Net Liabilities
September 30, 2018
Current:
Financial swaps	Other current assets	$	1,401	$	(499	)	$	902	$	499	$	(499	)		$	—
Financial swaps	Other current liabilities	36		(36		)	—		84		(36		)		48
Long-term:
Financial swaps	Other liabilities	8		(8		)	—		35		(8		)		27
Total		$	1,445	$	(543	)	$	902	$	618	$	(543	)		$	75

December 31, 2017
Current:
Financial swaps	Other current assets	$	18	$	—		$	18	$	—	$	—			$	—
Financial swaps	Other current liabilities	553		(553		)	—		1,971		(748		)	⁽¹⁾	1,223
Forward contracts	Other current liabilities	—		—			—		2		—				2
Long-term:
Financial swaps	Other assets	4		—			4		—		—				—
Total		$	575	$	(553	)	$	22	$	1,973	$	(748	)		$	1,225

⁽¹⁾ Current liability derivative amount offset includes $0.2 million of collateral receivable for the period ended December 31, 2017 .

The table below presents the volumes of derivative commodity forward contracts and swaps outstanding at September 30, 2018 and 2017 (in thousands of units).



		September 30,
Commodity	Units	2018	2017
Electricity purchases	MWh	84	122
Electricity sales	MWh	33	162
Natural gas purchases	MMBtu	8,754	7,975
Natural gas sales	MMBtu	308	230
Diesel purchases	Gallons	220	304

Credit Risk

At September 30, 2018 , Idaho Power did not have material credit risk exposure from financial instruments, including derivatives. Idaho Power monitors credit risk exposure through reviews of counterparty credit quality, corporate-wide counterparty credit exposure, and corporate-wide counterparty concentration levels. Idaho Power manages these risks by establishing credit and concentration limits on transactions with counterparties and requiring contractual guarantees, cash deposits, or letters of credit from counterparties or their affiliates, as deemed necessary. Idaho Power’s physical power contracts are commonly under Western Systems Power Pool agreements, physical gas contracts are usually under North American Energy Standards Board contracts, and financial transactions are usually under International Swaps and Derivatives Association, Inc. contracts. These contracts contain adequate assurance clauses requiring collateralization if a counterparty has debt that is downgraded below investment grade by at least one rating agency.

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Credit-Contingent Features

Certain Idaho Power derivative instruments contain provisions that require Idaho Power's unsecured debt to maintain an investment grade credit rating from Moody's Investors Service and Standard & Poor's Ratings Services. If Idaho Power's unsecured debt were to fall below investment grade, it would be in violation of these provisions, and the counterparties to the derivative instruments could request immediate payment or demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position at September 30, 2018 was $0.6 million . Idaho Power posted $0.6 million cash collateral related to this amount. If the credit-risk-related contingent features underlying these agreements were triggered on September 30, 2018 , Idaho Power would have been required to pay or post collateral to its counterparties up to an additional $3.3 million to cover the open liability positions as well as completed transactions that have not yet been paid.

12. FAIR VALUE MEASUREMENTS

IDACORP and Idaho Power have categorized their financial instruments into a three-level fair value hierarchy, based on the priority of the inputs to the valuation technique. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). If the inputs used to measure the financial instruments fall within different levels of the hierarchy, the categorization is based on the lowest level input that is significant to the fair value measurement of the instrument.

Financial assets and liabilities recorded on the condensed consolidated balance sheets are categorized based on the inputs to the valuation techniques as follows:

• Level 1: Financial assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market that IDACORP and Idaho Power have the ability to access.

• Level 2: Financial assets and liabilities whose values are based on the following:

a) quoted prices for similar assets or liabilities in active markets;

b) quoted prices for identical or similar assets or liabilities in non-active markets;

c) pricing models whose inputs are observable for substantially the full term of the asset or liability; and

d) pricing models whose inputs are derived principally from or corroborated by observable market data through correlation or other means for substantially the full term of the asset or liability.

IDACORP and Idaho Power Level 2 inputs are based on quoted market prices adjusted for location using corroborated, observable market data.

• Level 3: Financial assets and liabilities whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability.

IDACORP’s and Idaho Power’s assessment of a particular input's significance to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. An item recorded at fair value is reclassified among levels when changes in the nature of valuation inputs cause the item to no longer meet the criteria for the level in which it was previously categorized. There were no transfers between levels or material changes in valuation techniques or inputs during the nine months ended September 30, 2018 .

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The table below presents information about IDACORP’s and Idaho Power’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 , and December 31, 2017 (in thousands).



	September 30, 2018								December 31, 2017
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Money market funds
IDACORP ⁽¹⁾	$	71,230	$	—	$	—	$	71,230	$	28,038	$	—	$	—	$	28,038
Idaho Power	109,038		—		—		109,038		10,260		—		—		10,260
Derivatives	902		—		—		902		22		—		—		22
Equity securities	27,540		—		—		27,540		30,266		—		—		30,266
Liabilities:
Derivatives	75		—		—		75		1,223		2		—		1,225

⁽¹⁾ Holding company only. Does not include amounts held by Idaho Power.

Idaho Power’s derivatives are contracts entered into as part of its management of loads and resources. Electricity derivatives are valued on the Intercontinental Exchange with quoted prices in an active market. Natural gas and diesel derivatives are valued using New York Mercantile Exchange and Intercontinental Exchange pricing, adjusted for location basis, which are also quoted under NYMEX and ICE pricing. Equity securities consist of employee-directed investments related to an executive deferred compensation plan and actively traded money market and exchange traded funds related to the SMSP. The investments are measured using quoted prices in active markets and are held in a Rabbi trust.

The table below presents the carrying value and estimated fair value of financial instruments that are not reported at fair value, as of September 30, 2018 , and December 31, 2017 , using available market information and appropriate valuation methodologies (in thousands).



	September 30, 2018				December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
IDACORP
Assets:
Notes receivable ⁽¹⁾	$	3,804	$	3,804	$	3,804	$	3,804
Liabilities:
Long-term debt ⁽¹⁾	1,834,422		1,919,026		1,746,123		1,915,459
Idaho Power
Liabilities:
Long-term debt ⁽¹⁾	1,834,422		1,919,026		1,746,123		1,915,459

⁽¹⁾ Notes receivable and long-term debt are categorized as Level 3 and Level 2, respectively, of the fair value hierarchy, as defined earlier in this Note 12.

Notes receivable are related to Ida-West and are valued based on unobservable inputs, including discounted cash flows, which are partially based on forecasted hydroelectric conditions. Long-term debt is not traded on an exchange and is valued using quoted rates for similar debt in active markets. Carrying values for cash and cash equivalents, deposits, customer and other receivables, notes payable, accounts payable, interest accrued, and taxes accrued approximate fair value.

13. SEGMENT INFORMATION

IDACORP’s only reportable segment is utility operations. The utility operations segment’s primary source of revenue is the regulated operations of Idaho Power. Idaho Power’s regulated operations include the generation, transmission, distribution, purchase, and sale of electricity. This segment also includes income from IERCo, a wholly-owned subsidiary of Idaho Power that is also subject to regulation and is a one-third owner of BCC, an unconsolidated joint venture.

IDACORP’s other operating segments are below the quantitative and qualitative thresholds for reportable segments and are included in the "All Other" category in the table below. This category is comprised of IFS’s investments in affordable housing developments and historic rehabilitation projects, Ida-West’s joint venture investments in small hydroelectric generation projects, and IDACORP’s holding company expenses.

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The table below summarizes the segment information for IDACORP’s utility operations and the total of all other segments, and reconciles this information to total enterprise amounts (in thousands).



	Utility Operations		All Other		Eliminations			Consolidated Total
Three months ended September 30, 2018:
Revenues	$	407,355	$	1,446	$	—		$	408,801
Net income attributable to IDACORP, Inc.	100,194		2,037		—			102,231
Total assets as of September 30, 2018	6,178,377		147,307		(37,048		)	6,288,636
Three months ended September 30, 2017:
Revenues	$	406,655	$	1,669	$	—		$	408,324
Net income attributable to IDACORP, Inc.	88,329		2,305		—			90,634
Nine months ended September 30, 2018:
Revenues	$	1,055,515	$	3,345	$	—		$	1,058,860
Net income attributable to IDACORP, Inc.	196,687		3,974		—			200,661
Nine months ended September 30, 2017:
Revenues	$	1,040,387	$	3,487	$	—		$	1,043,874
Net income attributable to IDACORP, Inc.	169,192		4,375		—			173,567

14. CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME

The table below presents changes in components of accumulated other comprehensive income (AOCI), net of tax, during the three and nine months ended September 30, 2018 and 2017 (in thousands). Items in parentheses indicate charges to AOCI.



	Defined Benefit Pension Items
	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Balance at beginning of period	$	(29,521	)	$	(19,941	)	$	(30,964	)	$	(20,882	)
Amounts reclassified out of AOCI	721			471			2,164			1,412
Balance at end of period	$	(28,800	)	$	(19,470	)	$	(28,800	)	$	(19,470	)

The table below presents amounts reclassified out of components of AOCI and the income statement location of those amounts reclassified during the three and nine months ended September 30, 2018 and 2017 (in thousands). Items in parentheses indicate increases to net income.



	Amount Reclassified from AOCI
Details About AOCI	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Amortization of defined benefit pension items ⁽¹⁾
Prior service cost	$	24		$	31		$	73		$	95
Net loss	947			742			2,841			2,223
Total before tax	971			773			2,914			2,318
Tax benefit ⁽²⁾	(250		)	(302		)	(750		)	(906		)
Net of tax	721			471			2,164			1,412
Total reclassification for the period	$	721		$	471		$	2,164		$	1,412

⁽¹⁾ Amortization of these items is included in IDACORP's condensed consolidated income statements in other operating expenses and in Idaho Power's condensed consolidated statements of income in other expense, net.

⁽²⁾ The tax benefit is included in income tax expense in the condensed consolidated statements of income of both IDACORP and Idaho Power.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholders and the Board of Directors of IDACORP, Inc.

Results of Review of Interim Financial Information

We have reviewed the accompanying condensed consolidated balance sheet of IDACORP, Inc. and subsidiaries (the “Company”) as of September 30, 2018 , the related condensed consolidated statements of income and comprehensive income for the three-month and nine-month periods ended September 30, 2018 and 2017 and of equity and cash flows for the nine-month periods ended September 30, 2018 and 2017 , and the related notes (collectively referred to as the "interim financial information"). Based on our reviews, we are not aware of any material modifications that should be made to the accompanying interim financial information for it to be in conformity with accounting principles generally accepted in the United States of America.

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheet of the Company as of December 31, 2017 , and the related consolidated statements of income, comprehensive income, equity, and cash flows for the year then ended (not presented herein); and in our report dated February 22, 2018, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying condensed consolidated balance sheet as of December 31, 2017 , is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

Basis for Review Results

This interim financial information is the responsibility of the Company’s management. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our reviews in accordance with standards of the PCAOB. A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the PCAOB, the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

/s/ DELOITTE & TOUCHE LLP

Boise, Idaho

November 1, 2018

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholder and the Board of Directors of Idaho Power Company

Results of Review of Interim Financial Information

We have reviewed the accompanying condensed consolidated balance sheet of Idaho Power Company and subsidiary (the “Company”) as of September 30, 2018 , the related condensed consolidated statements of income and comprehensive income for the three-month and nine-month periods ended September 30, 2018 and 2017 and of cash flows for the nine-month periods ended September 30, 2018 and 2017 , and the related notes (collectively referred to as the "interim financial information"). Based on our reviews, we are not aware of any material modifications that should be made to the accompanying interim financial information for it to be in conformity with accounting principles generally accepted in the United States of America.

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheet of the Company as of December 31, 2017 , and the related consolidated statements of income, comprehensive income, retained earnings and cash flows for the year then ended (not presented herein); and in our report dated February 22, 2018, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying condensed consolidated balance sheet as of December 31, 2017 , is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

Basis for Review Results

/s/ DELOITTE & TOUCHE LLP

Boise, Idaho

November 1, 2018

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION

AND RESULTS OF OPERATIONS

In Management’s Discussion and Analysis of Financial Condition and Results of Operations (MD&A) in this report, the general financial condition and results of operations for IDACORP, Inc. and its subsidiaries (collectively, IDACORP) and Idaho Power Company and its subsidiary (collectively, Idaho Power) are discussed. While reading the MD&A, please refer to the accompanying condensed consolidated financial statements of IDACORP and Idaho Power. Also refer to "Cautionary Note Regarding Forward-Looking Statements" in this report for important information regarding forward-looking statements made in this MD&A and elsewhere in this report. This discussion updates the MD&A included in the Annual Report on Form 10-K for the year ended December 31, 2017 , and should also be read in conjunction with the information in that report. The results of operations for an interim period generally will not be indicative of results for the full year, particularly in light of the seasonality of Idaho Power's sales volumes, as discussed below.

INTRODUCTION

IDACORP is a holding company formed in 1998 whose principal operating subsidiary is Idaho Power. IDACORP’s common stock is listed and trades on the New York Stock Exchange under the trading symbol "IDA". Idaho Power is an electric utility whose rates and other matters are regulated by the Idaho Public Utility Commission (IPUC), Public Utility Commission of Oregon (OPUC), and Federal Energy Regulatory Commission (FERC). Idaho Power generates revenues and cash flows primarily from the sale and distribution of electricity to customers in its Idaho and Oregon service territories, as well as from the wholesale sale and transmission of electricity. Idaho Power experiences its highest retail energy sales during the summer irrigation and cooling season, with a lower peak in the winter that generally results from heating demand. Idaho Power’s rates are established through regulatory proceedings that affect its ability to recover its costs and the potential to earn a return on its investment.

Idaho Power is the parent of Idaho Energy Resources Co. (IERCo), a joint venturer in Bridger Coal Company (BCC), which mines and supplies coal to the Jim Bridger generating plant owned in part by Idaho Power (Jim Bridger plant). IDACORP’s other significant subsidiaries include IDACORP Financial Services, Inc. (IFS), an investor in affordable housing and other real estate investments, and Ida-West Energy Company, an operator of small hydroelectric generation projects that satisfy the requirements of the Public Utility Regulatory Policies Act of 1978 (PURPA).

EXECUTIVE OVERVIEW

Management's Outlook and Company Initiatives

In the Annual Report on Form 10-K for the year ended December 31, 2017 , IDACORP's and Idaho Power's management included a brief overview of their initiatives and strategies for the companies for 2018 and beyond, under the heading "Executive Overview - 2018 Initiatives and Strategy" in the MD&A. As of the date of this report, management's outlook and strategy remain consistent with that discussion. Most notably:

•

Idaho Power continues to expect positive customer growth in its service area, and continues to participate in and support state and local economic development initiatives aimed at responsible and sustainable growth. During the first nine months of 2018 , Idaho Power's customer count grew by approximately 9,000 customers, and for the twelve months ended September 30, 2018 , the customer growth rate was 2.2 percent .


•	Idaho Power anticipates substantial capital investments, with expected total capital expenditures of approximately $1.5 billion over the five-year period from 2018 (including the expenditures incurred so far in 2018 ) through 2022.


•	Idaho Power continues to execute on its four strategic areas: growing to enhance financial strength, improving Idaho Power's core business, enhancing Idaho Power’s brand, and focusing on safety and employee engagement.


•	Idaho Power continues to focus on timely recovery of costs and earning a reasonable return on investment, including working to evaluate and ensure that its rate design and regulatory mechanisms properly reflect the cost to provide electric service.

During the first nine months of 2018, Idaho Power reached various regulatory settlements that were approved by the IPUC and OPUC. These approved settlements related to recent income tax reform, the indefinite extension, with modifications, of the current earnings support and sharing mechanism, the prudence of certain Hells Canyon Complex (HCC) relicensing costs, the treatment of costs incurred to join the energy imbalance market implemented in the western United States (Western EIM), and the creation of new customer classes for customers with on-site generation. Idaho Power believes that these regulatory actions

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are positive as they reduce future uncertainty for both shareholders and customers. Refer to "Regulatory Matters" in this MD&A for more information on these and other regulatory proceedings.

Summary of Financial Results

The following is a summary of Idaho Power's net income, net income attributable to IDACORP, and IDACORP's earnings per diluted share for the three and nine months ended September 30, 2018 and 2017 (in thousands, except earnings per share amounts):



	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Idaho Power net income	$	100,194	$	88,329	$	196,687	$	169,192
Net income attributable to IDACORP, Inc.	$	102,231	$	90,634	$	200,661	$	173,567
Average outstanding shares – diluted	50,565		50,421		50,503		50,408
IDACORP, Inc. earnings per diluted share	$	2.02	$	1.80	$	3.97	$	3.44

The table below provides a reconciliation of net income attributable to IDACORP for the three and nine months ended September 30, 2018 , from the same periods in 2017 (items are in millions and are before related income tax impact unless otherwise noted).



	Three months ended					Nine months ended
Net income attributable to IDACORP, Inc. - September 30, 2017			$	90.6				$	173.6
Increase (decrease) in Idaho Power net income:
Customer growth, net of associated power supply costs and power cost adjustment mechanisms	2.9					7.1
Usage per retail customer, net of associated power supply costs and power cost adjustment mechanisms	(2.0	)				(8.9	)
Idaho fixed cost adjustment (FCA) revenues	5.1					16.1
Retail revenues per megawatt-hour (MWh), net of associated power supply costs and power cost adjustment mechanisms	(10.2	)				(20.4	)
Transmission services (wheeling) and other revenues	7.0					11.6
Non-cash amortization of regulatory deferrals (related to tax reform)	(2.9	)				(4.0	)
Other operations and maintenance (O&M) expenses (excluding non-cash amortization of regulatory deferrals)	(5.2	)				(8.9	)
Depreciation expense	(1.4	)				(0.8	)
Other changes in operating revenues and expenses, net	(0.1	)				(1.0	)
Revenue sharing with customers	(1.5	)				(1.5	)
Decrease in Idaho Power operating income	(8.3	)				(10.7	)
Earnings of equity-method investments	1.4					5.3
Non-operating income and expenses	—					1.2
Tax benefit from remeasurement of deferred taxes and make-whole premium for early bond redemption	5.7					7.0
Income tax expense (excluding tax benefit from remeasurement of deferred taxes and early bond redemption)	13.1					24.7
Total increase in Idaho Power net income			11.9					27.5
Other IDACORP changes (net of tax)			(0.3		)			(0.4		)
Net income attributable to IDACORP, Inc. - September 30, 2018			$	102.2				$	200.7

Net Income - Third Quarter 2018

IDACORP's net income increased $11.6 million for the third quarter of 2018 compared with the third quarter of 2017, primarily due to higher net income at Idaho Power.

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Customer growth increased operating income by $2.9 million in the third quarter of 2018 compared with the third quarter of 2017, as the number of Idaho Power customers grew by 2.2 percent during the twelve months ended September 30, 2018. Sales volumes on a per-customer basis decreased operating income by $2.0 million in the third quarter of 2018 compared with the third quarter of 2017. A decrease in sales volumes to residential customers was partially offset by an increase in usage per irrigation customer. Milder temperatures in the third quarter of 2018 compared with the third quarter of 2017 caused residential customers to use 7 percent less electricity per customer for cooling and heating, while decreased precipitation led agricultural irrigation customers to use 6 percent more electricity per customer to operate irrigation pumps. The decrease in residential sales volumes was partially offset by the FCA mechanism (applicable to residential and small commercial customers), which increased revenues by $5.1 million during the third quarter of 2018 compared with the third quarter of 2017.

The net decrease in retail revenues per MWh reduced operating income by $10.2 million in the third quarter of 2018 compared with the third quarter of 2017. The settlement stipulations approved by the IPUC and OPUC during the second quarter of 2018 relating to recent income tax reform reduced revenues by approximately $7 million in the third quarter of 2018 compared with the third quarter of 2017. The timing of the revenue reductions may not align with decreases in income tax expense in any given period due to the method and timing of customer rate reductions provided for in the settlement stipulations, the nature and timing of income tax accruals, discrete items, and other items discussed in more detail in the Income Tax Reform section below. Also, a change in customer sales mix reduced the retail revenues per MWh as volumes sold to residential customers made up a smaller portion of the customer sales mix. Residential customers generally pay higher rates than other customers.

During the third quarter of 2018, Idaho Power benefited from a $7.0 million increase in transmission services (wheeling) and other revenue, compared with the third quarter of 2017. This change was largely due to an increase in Idaho Power's open access transmission tariff (OATT) rates that became effective in October 2017 and an increase in wheeling volumes.

Other O&M expenses included $2.9 million of non-cash amortization expense of regulatory deferrals that would otherwise be a future liability of Idaho customers, as provided by the settlement stipulation approved by the IPUC related to income tax reform. Excluding the non-cash amortization of regulatory deferrals, other O&M expenses were $5.2 million higher in the third quarter of 2018 compared with the third quarter of 2017. In the third quarter of 2018 compared with the third quarter of 2017, transmission and distribution asset maintenance expense increased $1.4 million due to higher maintenance service costs and labor and benefit costs increased $3.8 million primarily related to higher variable employee-related costs.

Depreciation expense was $1.4 million higher in the third quarter of 2018 compared with the third quarter of 2017, due to an increase in plant-in-service.

During the third quarter of 2018, Idaho Power recorded $1.5 million as a provision against current revenues to be refunded to customers through a future rate reduction, based on its estimate of full-year 2018 return on year-end equity in the Idaho jurisdiction (Idaho ROE). In 2018, Idaho Power did not record any provision for sharing with customers prior to the third quarter or in any periods during 2017. This revenue sharing arrangement, which requires Idaho Power to share with Idaho customers a portion of Idaho-jurisdiction earnings exceeding a 10.0 percent Idaho ROE, is related to a December 2011 settlement stipulation with the IPUC, which was extended and modified in October 2014 (October 2014 Idaho Earnings Support and Sharing Settlement Stipulation). The October 2014 Idaho Earnings Support and Sharing Settlement Stipulation is described further in "Regulatory Matters" in this MD&A and in Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report.

Due to the recent federal and Idaho income tax rate changes (discussed in further detail below), Idaho Power remeasured deferred taxes on the adjustment of temporary differences related to IDACORP’s 2017 consolidated income tax return filings, which decreased Idaho Power income tax expense by $5.7 million in the third quarter of 2018, compared with the same period in 2017. Excluding the remeasurement, Idaho Power income tax expense decreased $13.1 million in the third quarter of 2018 compared with the third quarter of 2017, due primarily to the lower federal and state statutory income tax rates.

Net Income - Year-to-Date 2018

IDACORP's net income increased $27.1 million for the first nine months of 2018 compared with the same period in 2017, primarily due to higher net income at Idaho Power. Customer growth added $7.1 million to Idaho Power operating income, compared with the first nine months of 2017. Sales volumes on a per-customer basis decreased operating income by $8.9 million in the first nine months of 2018 compared with the same period in 2017. A decrease in sales volumes to residential customers was partially offset by an increase in usage per irrigation customer. Milder temperatures in the first nine months of 2018 compared with the same period of 2017 caused residential customers to use 7 percent less electricity per customer for cooling and heating, while decreased precipitation led agricultural irrigation customers to use 9 percent more electricity per

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customer to operate irrigation pumps. However, due to the lower usage by residential customers, the FCA mechanism added $16.1 million to operating income during the first nine months of 2018, compared with the first nine months of 2017.

The net decrease in retail revenues per MWh reduced operating income by $20.4 million in the first nine months of 2018 compared with the same period in 2017. The settlement stipulations approved by the IPUC and OPUC during the second quarter of 2018 relating to recent income tax reform reduced revenues by approximately $14 million in the first nine months of 2018. The timing of the revenue reductions may not align with decreases in income tax expense in any given period due to the method and timing of customer rate reductions provided for in the settlement stipulations, the nature and timing of income tax accruals, discrete items, and other items discussed in more detail in the Income Tax Reform section below. Also, a change in customer sales mix reduced the retail revenues per MWh as volumes sold to residential customers made up a smaller portion of the customer sales mix. Residential customers generally pay higher rates than other customers.

During the first nine months of 2018, Idaho Power benefited from an $11.6 million increase in transmission services (wheeling) and other revenues, compared with the first nine months of 2017. This change was largely due to an increase in Idaho Power's OATT rates that became effective in October 2017 and, to a lesser extent, an increase in wheeling volumes.

Other O&M expenses included $4.0 million of non-cash amortization expense of regulatory deferrals that would otherwise be a future liability of Idaho customers, as provided by the settlement stipulation approved by the IPUC related to income tax reform. Excluding the non-cash amortization of regulatory deferrals, other O&M expenses were $8.9 million higher in the first nine months of 2018 compared with the first nine months of 2017. In the first nine months of 2018, compared with the same period in 2017, transmission and distribution asset maintenance expense increased $3.4 million due to higher maintenance service costs and labor and benefit costs increased $5.6 million primarily related to higher variable employee-related costs.

As noted above, during the first nine months of 2018, Idaho Power recorded $1.5 million as a provision against current revenues to be refunded to customers through a future rate reduction pursuant to the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation.

An increase in income from Idaho Power's unconsolidated investment in BCC increased non-operating income by $5.3 million in the first nine months of 2018 compared with the first nine months in 2017, primarily due to an increase in coal sales prices and lower expenses at BCC. Idaho Power anticipates that projected coal sales prices and coal delivery volumes to the Jim Bridger plant in the fourth quarter of 2018 will result in lower revenues, and therefore, will decrease income from BCC in the fourth quarter of 2018 compared with the fourth quarter of 2017. Idaho Power expects income from BCC for the full-year 2018 to be comparable with the income from BCC in 2017.

Idaho Power's $5.7 million remeasurement of deferred taxes resulting from the federal and Idaho income tax rate change (discussed in further detail below) on the adjustment of temporary differences related to IDACORP’s 2017 consolidated income tax return filings and the $1.3 million flow-through benefit of tax deductible make-whole premiums that Idaho Power paid in connection with the early redemption of long-term debt in April 2018 decreased Idaho Power income tax expense by $7.0 million during the first nine months of 2018, compared with the first nine months of 2017. Excluding these items, Idaho Power income tax expense was $24.7 million lower during the first nine months of 2018 compared with the first nine months of 2017, due mostly to the lower federal and state statutory income tax rates resulting from income tax reform.

Overview of General Factors and Trends Affecting Results of Operations and Financial Condition

IDACORP's and Idaho Power's results of operations and financial condition are affected by a number of factors, and the impact of those factors is discussed in more detail below in this MD&A. To provide context for the discussion elsewhere in this report, some of the more notable factors are summarized below:

•

Income Tax Reform: In December 2017, the Tax Cuts and Jobs Act was signed into law, which lowered the corporate federal income tax rate from 35 percent to 21 percent and modified or eliminated certain federal income tax deductions for corporations. The majority of the changes, including the rate reduction, became effective on January 1, 2018. In March 2018, Idaho House Bill 463 was signed into law reducing the Idaho state corporate income tax rate from 7.4 percent to 6.925 percent. In May 2018, the IPUC issued an order approving a settlement stipulation (May 2018 Idaho Tax Reform Settlement Stipulation) related to income tax reform. Beginning June 1, 2018, the settlement stipulation provides an annual (a) $18.7 million reduction to Idaho customer base rates and (b) $7.4 million amortization (currently recorded as Other O&M expense) of existing regulatory deferrals for specified items or future amortization of other existing or future unspecified regulatory deferrals that would otherwise be a future liability recoverable from Idaho customers. Additionally, a one-time benefit of a $7.8 million rate reduction is being provided to Idaho customers throu gh the Idaho-jurisdiction power cost adjustment (PCA) mech anism during the period from June 1, 2018, through

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May 31, 2019, for the income tax reform benefits accrued from January 1, 2018 to May 31, 2018, and the income tax reform benefits related to Idaho Power's OATT. The OATT amount provided via the PCA mechanism will decrease to $2.7 million on June 1, 2019, for income tax reform benefits related to Idaho Power's OATT and will cease on June 1, 2020, to reflect the full inclusion of income tax reform benefits in Idaho Power's OATT. The May 2018 Idaho Tax Reform Settlement Stipulation was designed to return to Idaho customers their share of the estimated annual pro forma tax expense reductions resulting from income tax reform, based on the full-year 2017 as required by the IPUC. Idaho Power financial results from 2018 forward will be affected by any differences between annual income tax expense and the pro forma 2017 income tax expense used in the settlement until incorporated into a future rate proceeding or rate case. Refer to "Regulatory Matters" in this MD&A for more information on the related regulatory proceedings.

•

Regulation of Rates and Cost Recovery: The price that Idaho Power is authorized to charge for its electric and transmission service is a critical factor in determining IDACORP's and Idaho Power's results of operations and financial condition. Those rates are established by state regulatory commissions and the FERC and are intended to allow Idaho Power an opportunity to recover its expenses and earn a reasonable return on investment. Idaho Power focuses on timely recovery of its costs through filings with its regulators, working to put in place innovative regulatory mechanisms, and on the prudent management of expenses and investments. The October 2014 Idaho Earnings Support and Sharing Settlement Stipulation includes provisions for the accelerated amortization of certain tax credits to help achieve a minimum 9.5 percent Idaho ROE. The settlement stipulation also provides for the potential sharing between Idaho Power and customers of Idaho-jurisdictional earnings in excess of specified levels of Idaho ROE. The May 2018 Idaho Tax Reform Settlement Stipulation provides for the indefinite extension of the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation beyond its termination date of December 31, 2019. These settlement stipulations are described in "Regulatory Matters" in this MD&A and in Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report. During 2018, Idaho Power will continue to assess the need to file a general rate case to reset base rates, but does not anticipate filing a rate case in the next twelve months.

•

Economic Conditions and Loads: Economic conditions impact consumer demand for energy, revenues, collectability of accounts, the volume of wholesale energy sales, and the need to construct and improve infrastructure, purchase power, and implement programs to meet customer load demands. In recent years, Idaho Power has seen growth in the number of customers in its service area. Over the 12 months ended September 30, 2018 , Idaho Power's customer count grew by 2.2 percent . Idaho Power expects its number of customers to continue to increase in the foreseeable future. Employment in Idaho Power's service area grew by approximately 2.6 percent during the twelve months ended September 30, 2018 , based on Idaho Department of Labor preliminary September 2018 data. Idaho Power has in recent years supported State of Idaho-coordinated efforts to promote economic development with an emphasis on attracting industrial and commercial customers to its service area.

Idaho Power’s system is dual peaking, with the larger peak demand occurring in the summer. On July 9, 2018, Idaho Power reached its highest system peak demand so far in 2018 of 3,392 megawatts (MW), which was 30 MW below the all-time system peak demand, 3,422 MW, which was set on July 7, 2017.

In August 2018, Idaho Power began preparing its 2019 Integrated Resource Plan (IRP). As of the date of this report, the preliminary load forecast assumptions Idaho Power expects to use in the 2019 IRP are included in the table below. For comparison purposes, the analogous average annual growth rates used in the prior two IRPs are included.



	5-Year Forecast		20-Year Forecast
	Annual Growth Rate: Retail Sales (Billed MWh)	Annual Growth Rate: Annual Peak (Peak Demand)	Annual Growth Rate: Retail Sales (Billed MWh)	Annual Growth Rate: Annual Peak (Peak Demand)
2019 IRP (preliminary)	1.3%	1.4%	1.0%	1.2%
2017 IRP	1.1%	1.6%	0.9%	1.4%
2015 IRP	1.1%	1.5%	1.1%	1.4%

•

Weather Conditions: Weather and agricultural growing conditions have a significant impact on Idaho Power's energy sales. Relatively low and high temperatures result in greater energy use for heating and cooling, respectively. During the agricultural growing season, which in large part occurs during the second and third quarters, irrigation customers use electricity to operate irrigation pumps, and weather conditions can impact the timing and extent of use of those pumps. Idaho Power also has tiered rates and seasonal rates, which contribute to increased revenues during higher-load periods, most notably during the third quarter of each year when overall customer demand is highest. Much of the

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adverse or favorable impact of weather on sales of energy to residential and small commercial customers is mitigated through the Idaho FCA mechanism, which is described in Note 3 - "Regulatory Matters" to the condensed consolidated financial statements in this report.

Further, as Idaho Power's hydroelectric facilities comprise nearly one-half of Idaho Power's nameplate generation capacity, precipitation levels impact the mix of Idaho Power's generation resources. When hydroelectric generation is reduced, Idaho Power must rely on more expensive generation sources and purchased power. When favorable hydroelectric generating conditions exist for Idaho Power, they also may exist for other Pacific Northwest hydroelectric facility operators, lowering regional wholesale market prices and impacting the revenue Idaho Power receives from wholesale energy sales of its excess power. Much of the adverse or favorable impact of this volatility is addressed through the Idaho and Oregon power cost adjustment mechanisms. For 2018, Idaho Power expects generation from its hydroelectric resources to be in the range of 8.5 to 9.0 million MWh, compared with 20-year average annual hydroelectric generation of 7.5 million MWh.

•

Rate Base Growth and Infrastructure Investment: As noted above, the rates established by the IPUC and OPUC are determined so as to provide an opportunity for Idaho Power to recover authorized operating expenses and earn a reasonable return on “rate base.” Rate base is generally determined by reference to the original cost (net of accumulated depreciation) of utility plant in service and certain other assets, subject to various adjustments for deferred taxes and other items. Over time, rate base is increased by additions to utility plant in service and reduced by depreciation and retirement of utility plant and write-offs as authorized by the IPUC and OPUC. In recent years, Idaho Power has been pursuing significant enhancements to its utility infrastructure, including major ongoing transmission projects such as the Boardman-to-Hemingway and Gateway West projects, in an effort to ensure an adequate supply of electricity, to provide service to new customers, and to maintain system reliability. Idaho Power's existing hydroelectric and thermal generation facilities also require continuing upgrades and component replacement, and the company is undertaking a significant relicensing effort for the HCC, its largest hydroelectric generation resource. Idaho Power intends to pursue timely inclusion of any significant completed capital projects into rate base as part of a general rate case or other appropriate regulatory proceeding.

•

Mitigation of Impact of Fuel and Purchased Power Expense: In addition to hydroelectric generation, Idaho Power relies significantly on natural gas and coal to fuel its generation facilities and power purchases in the wholesale markets. Fuel costs are impacted by electricity sales volumes, the terms of contracts for fuel, Idaho Power's generation capacity, the availability of hydroelectric generation resources, transmission capacity, energy market prices, and Idaho Power's hedging program for managing fuel costs. Recently, low natural gas prices have made operation of Idaho Power's natural gas power plants more economical, resulting in increased operation of those plants and decreased operation of coal-fired plants. Purchased power costs are impacted by the terms of contracts for purchased power, the rate of expansion of alternative energy generation sources such as wind or solar energy, and wholesale energy market prices. The Idaho and Oregon power cost adjustment mechanisms mitigate in large part the potential adverse impacts to Idaho Power of fluctuations in power supply costs.

•

Regulatory and Environmental Compliance Costs: Idaho Power is subject to extensive federal and state laws, policies, and regulations, as well as regulatory actions and audits by agencies and quasi-governmental agencies, including the FERC, the North American Electric Reliability Corporation, and the Western Electricity Coordinating Council. Compliance with these requirements directly influences Idaho Power's operating environment and affects Idaho Power's operating costs. Environmental laws and regulations, in particular, may increase the cost of operating generation plants and constructing new facilities, require that Idaho Power install additional pollution control devices at existing generating plants, or require that Idaho Power cease operating certain generation plants. Idaho Power expects to spend significant amounts on environmental compliance and controls in the next decade.

•

Water Management and Relicensing of the Hells Canyon Hydroelectric Project: Because of Idaho Power's reliance on stream flow in the Snake River and its tributaries, Idaho Power participates in numerous proceedings and venues that may affect its water rights, seeking to preserve the long-term availability of its rights for its hydroelectric projects. Also, Idaho Power is involved in renewing its long-term federal license for the HCC, its largest hydroelectric generation source. Given the number of parties involved, Idaho Power's relicensing costs have been and are expected to continue to be substantial. Idaho Power cannot currently determine the ultimate terms of, and costs associated with, any resulting long-term license.

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RESULTS OF OPERATIONS

This section of MD&A takes a closer look at the significant factors that affected IDACORP’s and Idaho Power’s earnings during the three and nine months ended September 30, 2018 . In this analysis, the results for the three and nine months ended September 30, 2018 , are compared with the same periods in 2017 .

The table below presents Idaho Power’s energy sales and supply (in thousands of MWh) for the three and nine months ended September 30, 2018 and 2017 .



	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Retail energy sales	4,453		4,438		11,275		11,309
Wholesale energy sales	190		185		1,871		1,624
Bundled energy sales	129		31		426		182
Total energy sales	4,772		4,654		13,572		13,115
Hydroelectric generation	1,801		1,991		7,373		7,169
Coal generation	1,081		1,236		2,148		2,578
Natural gas and other generation	768		665		996		1,067
Total system generation	3,650		3,892		10,517		10,814
Purchased power	1,474		1,115		4,047		3,269
Line losses	(352	)	(353	)	(992	)	(968	)
Total energy supply	4,772		4,654		13,572		13,115

Sales Volume and Generation: In the third quarter and first nine months of 2018, retail sales volumes were relatively flat compared with the same periods in the prior year. Customer growth increased sales volumes during the three and nine months ended September 30, 2018, compared with the same periods in 2017, with the number of Idaho Power's customers growing by 2.2 percent over the prior twelve months. During the three and nine months ended September 30, 2018 , usage per irrigation customer was approximately 6 percent and 9 percent higher, respectively, compared with the same periods in 2017. Precipitation in the Idaho Power service area during the first nine months of 2018 was significantly less than in the first nine months of 2017, which increased usage by irrigation customers in the third quarter and first nine months of 2018. Usage per residential customer was approximately 7 percent lower in both the third quarter and the first nine months of 2018, respectively, compared with the same periods in 2017. The decrease in residential usage was primarily due to more moderate weather during the first nine months of 2018 compared with the same period in 2017, which decreased the use of electricity for heating and cooling purposes. Cooling degree-days in Boise, Idaho, were 17 percent lower during the nine months ended September 30, 2018, compared with the same period in 2017, but 19 percent above normal. Heating degree-days in Boise, Idaho, were 17 percent lower during the nine months ended September 30, 2018 compared with the same period in 2017, and 14 percent below normal. Also, bundled energy sales volumes increased during the third quarter and first nine months of 2018 compared with the same periods in 2017. The solar generation projects under PURPA contracts that were initiated in 2017 generated an increased number of renewable energy credits to sell bundled with electricity.

Total system generation decreased 6 percent and 3 percent for the three and nine months ended September 30, 2018 , respectively, compared with the same periods in 2017. For the first nine months of 2018, hydroelectric generation comprised 70 percent of Idaho Power's total system generation, compared with 66 percent for the first nine months of 2017. Generation from Idaho Power's hydroelectric plants increased due to strong reservoir storage attributable to above-normal snowpack in 2017 and near-normal snowpack during the first nine months of 2018. For both the three and nine months ended September 30, 2018, purchased power increased, compared with the same periods in 2017. Increased purchased power was due to an increase in energy purchased from generation projects under mandatory PURPA contracts, and wholesale gas and electricity market conditions that warranted third-party power purchases to serve system load or fulfill wholesale energy sale commitments. The increase in purchased power during the third quarter of 2018 reduced thermal generation, compared with the third quarter of 2017. For the nine months ended September 30, 2018 , the increased purchased power and increased hydroelectric generation reduced thermal generation, compared with the same period in 2017.

Wholesale energy sales volumes in the third quarter of 2018 were relatively flat, increasing 5 thousand MWh, or 3 percent , compared with the third quarter of 2017. During the first nine months of 2018, wholesale energy sales volumes increased 247 thousand MWh, or 15 percent , compared with the first nine months of 2017. The increase in the first nine months of 2018

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compared with the first nine months of 2017 was primarily due to an increase in purchased power resulting in increased energy available for wholesale energy sales.

The financial impacts of fluctuations in wholesale energy sales, purchased power, fuel expense, and other power supply-related expenses are addressed in Idaho Power's Idaho and Oregon power cost adjustment mechanisms, which are described later in this MD&A.

Operating Revenues

Retail Revenues: The table below presents Idaho Power’s retail revenues (in thousands) and MWh sales volumes (in thousands) for the three and nine months ended September 30, 2018 and 2017 , and the number of customers as of September 30, 2018 and 2017 .



	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Retail revenues:
Residential (includes $4,789, ($264), $23,841, and $8,068, respectively, related to the FCA ⁽¹⁾ )	$	137,177		$	145,555		$	393,014		$	410,246
Commercial (includes $305, $220, $958, and $606, respectively, related to the FCA ⁽¹⁾ )	85,936			89,305			237,127			242,564
Industrial	50,292			52,771			144,951			147,995
Irrigation	88,934			89,370			154,406			146,363
Provision for sharing	(1,500		)	—			(1,500		)	—
Deferred revenue related to HCC relicensing AFUDC ⁽²⁾	(2,815		)	(3,432		)	(6,861		)	(8,366		)
Total retail revenues	$	358,024		$	373,569		$	921,137		$	938,802
Volume of retail sales (MWh)
Residential	1,326			1,395			3,766			3,993
Commercial	1,109			1,112			3,079			3,090
Industrial	854			855			2,502			2,496
Irrigation	1,164			1,076			1,928			1,730
Total retail MWh sales	4,453			4,438			11,275			11,309
Number of retail customers at period end
Residential	461,389			450,857
Commercial	71,416			70,066
Industrial	118			120
Irrigation	21,189			20,914
Total customers	554,112			541,957

⁽¹⁾ The FCA mechanism is an alternative revenue program and does not represent revenue from contracts with customers.

⁽²⁾ As part of its January 30, 2009 general rate case order, the IPUC is allowing Idaho Power to recover a portion of the allowance for funds used during construction (AFUDC) on construction work in progress related to the HCC relicensing process, even though the relicensing process is not yet complete and the costs have not been moved to electric plant in service. Idaho Power is collecting approximately $8.8 million annually in the Idaho jurisdiction but is deferring revenue recognition of the amounts collected until the license is issued and the accumulated license costs approved for recovery are placed in service. Prior to the May 2018 Idaho Tax Reform Settlement Stipulation described in Note 3 - "Regulatory Matters," Idaho Power was collecting $10.7 million annually.

Changes in rates, changes in customer demand, and changes in FCA mechanism revenues are the primary reasons for fluctuations in retail revenues from period to period. The primary influences on customer demand for electricity are weather, economic conditions, and energy efficiency. Extreme temperatures increase sales to customers who use electricity for cooling and heating, while moderate temperatures decrease sales. Precipitation levels and the timing of precipitation during the agricultural growing season also affect sales to customers who use electricity to operate irrigation pumps. Rates are also seasonally adjusted, providing for higher rates during peak load periods, and residential customer rates are tiered, providing for higher rates based on higher levels of usage. The seasonal and tiered rate structures contribute to seasonal fluctuations in revenues and earnings.

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For purposes of illustration, Boise, Idaho weather-related information for the three and nine months ended September 30, 2018 and 2017 , is presented in the table that follows.



	Three months ended September 30,			Nine months ended September 30,
	2018	2017	Normal	2018	2017	Normal ⁽²⁾
Heating degree-days ⁽¹⁾	67	131	121	2,850	3,442	3,320
Cooling degree-days ⁽¹⁾	923	1,108	751	1,115	1,341	934
Precipitation (inches)	0.1	0.8	0.9	7.0	12.0	7.7

⁽¹⁾ Heating and cooling degree-days are common measures used in the utility industry to analyze the demand for electricity and indicate when a customer would use electricity for heating and air conditioning. A degree-day measures how much the average daily temperature varies from 65 degrees. Each degree of temperature above 65 degrees is counted as one cooling degree-day, and each degree of temperature below 65 degrees is counted as one heating degree-day. While Boise, Idaho weather conditions are not necessarily representative of weather conditions throughout Idaho Power's service area, the greater Boise area has the majority of Idaho Power's customers.

⁽²⁾ Normal heating degree-days and cooling degree-days elements are, by convention, the arithmetic mean of the elements computed over 30 consecutive years. The normal amounts are the sum of the monthly normal amounts. These normal amounts are computed by the National Oceanic and Atmospheric Administration.

Retail revenues decreased $15.5 million during the third quarter of 2018, and decreased $17.7 million during the first nine months of 2018, compared with the same periods in 2017 . The factors affecting retail revenues during the period are discussed below.

•

Rates : Rate changes, including the revenue reductions due to the settlement stipulations related to income tax reform described further in "Regulatory Matters" in this MD&A and in Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report, decreased retail revenues by $17.9 million and $24.5 million for the three and nine months ended September 30, 2018 , respectively, compared with the same periods in 2017. As a direct result of settlement stipulations approved by the IPUC and OPUC during the second quarter of 2018 relating to income tax reform, Idaho Power's revenues decreased approximately $7 million in the third quarter of 2018 and approximately $14 million in the first nine months of 2018. The timing of the revenue reductions may not align with decreases in income tax expense in any given period due to the method and timing of customer rate reductions provided for in the settlement stipulations, the nature and timing of income tax accruals, discrete items, and other items discussed in this MD&A. The customer rates include collection of amounts related to the PCA mechanism, which decreased revenues by $10.2 million and $7.7 million during the three and nine months ended September 30, 2018, respectively, compared with the same periods in 2017. The collection of amounts related to the PCA mechanism in rates has no effect on operating income as a corresponding amount is recorded as expense in the same period it is collected through rates.


•	Customers : Continued customer growth increased retail revenues $3.6 million and $9.2 million in the three and nine months ended September 30, 2018, respectively, compared with the same periods in 2017.

•

Usage : Lower usage (on a per customer basis), primarily by residential customers, decreased retail revenues by $4.9 million during the third quarter of 2018 and $16.9 million during the nine months ended September 30, 2018 , when compared with the same periods in 2017. Decreased usage was primarily the result of more moderate temperatures in the Idaho Power service area during the first nine months of 2018 compared with the first nine months of 2017, which led to decreased usage by residential customers for heating and cooling. For the three and nine months ended September 30, 2018, a 6 percent and 9 percent increase in usage per irrigation customer, respectively, was more than offset in both periods by a 7 percent decrease in usage per residential customer, compared with the same periods in 2017. Precipitation in the Idaho Power service area during the first nine months of 2018 was significantly less than during the first nine months of 2017, which led to increased usage by irrigation customers.

•

FCA Revenue : The FCA mechanism, applicable to residential and small commercial customers, adjusts revenue each year to accrue, or defer, the difference between the authorized fixed-cost recovery amount per customer and the actual fixed costs per customer recovered by Idaho Power through volume-based rates during the year. Lower usage (on a per customer basis) by residential and small general service customers during the three and nine months ended September 30, 2018 increased the amount of FCA revenue accrued by $5.1 million and $16.1 million, respectively, compared with the same periods in 2017.

•

Sharing : During the third quarter of 2018, Idaho Power recorded $1.5 million as a provision against current revenues to be refunded to customers through a future rate reduction, based on its estimate of full-year 2018 Idaho ROE. Idaho Power did not record any provision for sharing in 2018 prior to the third quarter or in 2017. This revenue sharing arrangement, which requires Idaho Power to share with Idaho customers a portion of Idaho-jurisdiction earnings exceeding a 10.0 percent Idaho ROE, is related to the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation. The October 2014 Idaho Earnings Support and Sharing Settlement Stipulation is described further in

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"Regulatory Matters" in this MD&A and in Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report.

Wholesale Energy Sales: Wholesale energy sales consist primarily of long-term sales contracts, opportunity sales of surplus system energy, and sales into the Western EIM, and do not include derivative transactions. The table below presents Idaho Power’s wholesale energy sales for the three and nine months ended September 30, 2018 and 2017 (in thousands, except for per MWh amounts).



	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Wholesale energy revenues	$	12,408	$	5,101	$	35,093	$	18,061
Wholesale MWh sold	190		185		1,871		1,624
Wholesale energy revenues per MWh	$	65.31	$	27.57	$	18.76	$	11.12

In the three and nine months ended September 30, 2018, wholesale energy revenue increased by $7.3 million , or 143 percent , and $17.0 million , or 94 percent , respectively, compared with the same periods of 2017. The average price of wholesale energy sales was 137 percent and 69 percent higher for the three and nine months ended September 30, 2018, respectively, compared with the same periods of 2017. While wholesale energy sales volumes were relatively flat during the three months ended September 30, 2018 compared with the same period of 2017, wholesale energy sales volumes increased 15 percent in the first nine months of 2018, compared with the same period of 2017. Wholesale energy prices increased significantly in the third quarter of 2018 compared with the third quarter of 2017 as the number of cooling degree days in the Pacific Northwest region were higher, particularly during the month of July 2018 compared with July 2017, which increased the demand for energy and drove the increase in wholesale energy revenues per MWh. An increase in purchased power resulted in additional energy available for wholesale energy sales in the first nine months of 2018 compared with the same period of 2017. The increase in wholesale energy sales volumes and sales prices during the three and nine months ended September 30, 2018, compared with the same periods in 2017, was also due to transactions in the Western EIM, which commenced in April 2018.

Transmission Services (Wheeling) Revenues: Revenue from transmission services increased $6.8 million and $11.2 million during the three and nine months ended September 30, 2018, respectively, compared with the same periods of 2017, largely due to Idaho Power's OATT rates that increased in October 2017 and an increase in wheeling volumes.

Energy Efficiency Program Revenues: In both Idaho and Oregon, energy efficiency riders fund energy efficiency program expenditures. Expenditures funded through the riders are reported as an operating expense with an equal amount recorded in revenues, resulting in no net impact on earnings. The cumulative variance between expenditures and amounts collected through the rider is recorded as a regulatory asset or liability. A liability balance indicates that Idaho Power has collected more than it has spent and an asset balance indicates that Idaho Power has spent more than it has collected. At September 30, 2018 , Idaho Power's energy efficiency rider balances were a $6.8 million regulatory liability in the Idaho jurisdiction and a $6.7 million regulatory asset in the Oregon jurisdiction.

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Operating Expenses

Purchased Power: The table below presents Idaho Power’s purchased power expenses and volumes for the three and nine months ended September 30, 2018 and 2017 (in thousands, except for per MWh amounts).



	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Expense
PURPA contracts	$	56,168	$	50,660	$	145,973	$	127,896
Other purchased power (including wheeling)	36,225		24,993		71,328		58,379
Total purchased power expense	$	92,393	$	75,653	$	217,301	$	186,275
MWh purchased
PURPA contracts	823		763		2,441		2,199
Other purchased power	651		352		1,606		1,070
Total MWh purchased	1,474		1,115		4,047		3,269
Cost per MWh from PURPA contracts	$	68.25	$	66.40	$	59.80	$	58.16
Cost per MWh from other sources	$	55.65	$	71.00	$	44.41	$	54.56
Weighted average - all sources	$	62.68	$	67.85	$	53.69	$	56.98

Purchased power expense increased $16.7 million , or 22 percent , and $31.0 million , or 17 percent , in the three and nine months ended September 30, 2018 , respectively, compared with the same periods of 2017 . The increase for the first nine months of 2018 compared to the first nine months of 2017 was due to a 50 percent increase in other purchased power MWh and an 11 percent increase in MWh purchased from generation projects under PURPA contracts during those periods. These increases were partially offset by decreases in costs per MWh of other purchased power. Other purchased power increased during the first nine months of 2018 compared to the first nine months of 2017 due to wholesale gas and electricity market conditions, which warranted third-party power purchases to serve retail customers or fulfill wholesale energy sale commitments.

Idaho Power is required by federal law to purchase power from some PURPA generation projects at a specified price regardless of the then-current load demand or wholesale energy market prices. The intermittent, non-dispatchable nature of most PURPA generation increases the likelihood that Idaho Power will at times be required to reduce output from its lower-cost hydroelectric and fossil fuel-fired generation resources and may be required to sell its excess power in the wholesale power market at a significant loss. The other purchased power cost per MWh often exceeds the wholesale energy sales revenue per MWh because Idaho Power generally needs to purchase more power during heavy load periods than during light load periods, and conversely has less energy available for wholesale energy sales during heavy load periods than light load periods. Market energy prices are typically higher during heavy load periods than during light load periods. Also, in accordance with Idaho Power's risk management policy, Idaho Power may purchase or sell energy several months in advance of anticipated delivery. The regional energy market price is dynamic and additional energy transactions that Idaho Power makes at current market prices may be noticeably different than the advance transaction prices. Most of the non-PURPA purchased power and substantially all of the PURPA power purchase costs are recovered through base rates and Idaho Power's power cost adjustment mechanisms.

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Fuel Expense: The table below presents Idaho Power’s fuel expenses and thermal generation for the three and nine months ended September 30, 2018 and 2017 (in thousands, except for per MWh amounts).



	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Expense
Coal	$	36,776	$	40,361	$	78,149	$	84,855
Natural gas ⁽¹⁾	16,847		14,168		24,724		26,342
Total fuel expense	$	53,623	$	54,529	$	102,873	$	111,197
MWh generated
Coal	1,081		1,236		2,148		2,578
Natural gas ⁽¹⁾	768		665		996		1,067
Total MWh generated	1,849		1,901		3,144		3,645
Cost per MWh - Coal	$	34.02	$	32.65	$	36.38	$	32.92
Cost per MWh - Natural gas	$	21.94	$	21.31	$	24.82	$	24.69
Weighted average, all sources	$	29.00	$	28.68	$	32.72	$	30.51

⁽¹⁾ Includes a negligible amount of expense and generation related to the Salmon diesel-fired generation plant.

The majority of the fuel for Idaho Power’s jointly-owned coal-fired plants is purchased through long-term contracts, including purchases from BCC, a one-third owned joint venture of IERCo. The price of coal from BCC is subject to fluctuations in mine operating expenses, geologic conditions, and production levels. BCC supplies up to two-thirds of the coal used by the Jim Bridger plant. Natural gas is mainly purchased on the regional wholesale spot market at published index prices. In addition to commodity (variable) costs, both natural gas and coal expenses include costs that are more fixed in nature for items such as capacity charges, transportation, and fuel handling. Period to period variances in fuel expense per MWh are noticeably impacted by these fixed charges when generation output is substantially different between the periods.

Fuel expense decreased $0.9 million , or 2 percent , in the third quarter of 2018, and decreased $8.3 million , or 7 percent , in the first nine months of 2018 , compared with the same periods of 2017 . The decrease in the third quarter of 2018 compared with the third quarter of 2017 was due to an increase in purchased power as wholesale gas and electricity market conditions warranted third-party power purchases to serve retail customers at times rather than dispatching Idaho Power-owned thermal resources. The decrease in the first nine months of 2018 compared with the first nine months of 2017 was primarily due to increased purchased power and increased output from Idaho Power's hydroelectric plants, which reduced utilization of gas and coal generation. Generation from the hydroelectric plants increased 3 percent during the first nine months of 2018, compared with the same period of 2017. Generation from Idaho Power's hydroelectric plants increased due to strong reservoir storage attributable to above-normal snowpack from 2017 and near-normal snowpack in 2018.

Power Cost Adjustment Mechanisms: Idaho Power's power supply costs (primarily purchased power and fuel expense, less wholesale energy sales) can vary significantly from year to year. Volatility of power supply costs arises from factors such as weather conditions, wholesale market prices, volumes of power purchased and sold in the wholesale markets, Idaho Power's hydroelectric and thermal generation volumes and fuel costs, generation plant availability, and retail loads. To address the volatility of power supply costs, Idaho Power's power cost adjustment mechanisms in the Idaho and Oregon jurisdictions allow Idaho Power to recover from customers, or refund to customers, most of the fluctuations in power supply costs. In the Idaho jurisdiction, the PCA includes a cost or benefit sharing ratio that allocates the deviations in net power supply expenses between customers (95 percent) and Idaho Power (5 percent), with the exception of PURPA power purchases and demand response program incentives, which are allocated 100 percent to customers. The Idaho deferral period, or PCA year, runs from April 1 through March 31. Amounts deferred during the PCA year are primarily recovered or refunded during the subsequent June 1 through May 31 period. Because of the power cost adjustment mechanisms, the primary financial impacts of power supply cost variations is that cash is paid out but recovery from customers does not occur until a future period, or cash that is collected is refunded to customers in a future period, resulting in fluctuations in operating cash flows from year to year.

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The table that follows presents the components of the Idaho and Oregon power cost adjustment mechanisms for the three and nine months ended September 30, 2018 and 2017 (in thousands).



	Three months ended September 30,					Nine months ended September 30,
	2018			2017		2018		2017
Idaho power supply cost accrual	$	1,337		$	8	$	35,236	$	21,851
Amortization of prior year authorized balances	(6,412		)	10,971		5,191		29,357
Total power cost adjustment expense	$	(5,075	)	$	10,979	$	40,427	$	51,208

The power supply accruals represent the portion of the power supply cost fluctuations accrued under the power cost adjustment mechanisms. When actual power supply costs are lower than the amount forecasted in power cost adjustment rates, which was the case for all periods presented, most of the difference is accrued. When actual power supply costs are higher than the amount forecasted in power cost adjustment rates, most of the difference is deferred. The amortization of the prior year’s balances represents the offset to the amounts being collected or refunded in the current power cost adjustment year that were deferred or accrued in the prior power cost adjustment year (the true-up component of the power cost adjustment mechanism).

Other O&M Expenses: Other O&M expenses increased $8.1 million, or 10 percent, and $12.9 million, or 5 percent, in the third quarter and first nine months of 2018 , respectively, compared with the same periods of 2017 . As provided by the settlement stipulation approved by the IPUC related to recent income tax reform, other O&M expenses in the third quarter and first nine months of 2018 also included $2.9 million and $4.0 million, respectively, of non-cash amortization expense of regulatory deferrals that would otherwise be a future liability of Idaho customers. Transmission and distribution asset maintenance expense increased $1.4 million and $3.4 million in the third quarter and first nine months of 2018, respectively, compared with the same periods in 2017, primarily due to higher maintenance service costs. Labor and benefit costs increased $3.8 million and $5.6 million in the third quarter and first nine months of 2018, respectively, primarily related to higher variable employee-related costs.

Income Taxes

IDACORP's and Idaho Power's income tax expense for the nine months ended September 30, 2018 , when compared with the same period in 2017 , decreased $31.6 million and $31.7 million , respectively, primarily due to lower statutory tax rates, a $1.3 million flow-through income tax benefit related to the tax deduction for bond redemption costs incurred in the second quarter of 2018, and the $5.7 million adjustment of deferred income tax balances related to IDACORP’s 2017 consolidated income tax return filings. The lower statutory tax rates were the result of the Tax Cuts and Jobs Act, which reduced the U.S. federal corporate income tax rate from 35 percent to 21 percent, and Idaho House Bill 463, which lowered the Idaho state corporate income tax rate from 7.4 percent to 6.925 percent. The new tax rates were effective on January 1, 2018. For information relating to IDACORP's and Idaho Power's computation of income tax expense and estimated annual effective tax rate, see Note 2 - "Income Taxes" to the condensed consolidated financial statements included in this report.

LIQUIDITY AND CAPITAL RESOURCES

Overview

Idaho Power has been pursuing significant enhancements to its utility infrastructure in an effort to ensure an adequate supply of electricity, to provide service to new customers, and to maintain system reliability. Idaho Power's existing hydroelectric and thermal generation facilities also require continuing upgrades and component replacement. Idaho Power anticipates these substantial capital expenditures to continue, with expected total capital expenditures of approximately $1.5 billion over the five-year period from 2018 (including expenditures incurred to-date in 2018 ) through 2022.

Idaho Power funds its liquidity needs for capital expenditures through cash flows from operations, debt offerings, commercial paper markets, credit facilities, and capital contributions from IDACORP. Idaho Power periodically files for rate adjustments for recovery of operating costs and capital investments to provide the opportunity to align Idaho Power's earned returns with those allowed by regulators. Idaho Power uses operating and capital budgets to control operating costs and capital expenditures. During the first nine months of 2018 , Idaho Power continued its efforts to optimize operations, control costs, and generate operating cash inflows to meet operating expenditures, contribute to capital expenditure requirements, and pay dividends to shareholders.

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As of October 26, 2018 , IDACORP's and Idaho Power's access to debt, equity, and credit arrangements included:


•	their respective $100 million and $300 million revolving credit facilities;


•	IDACORP's shelf registration statement filed with the U.S. Securities and Exchange Commission (SEC) on May 20, 2016, which may be used for the issuance of debt securities and common stock;


•	Idaho Power's shelf registration statement filed with the SEC on May 20, 2016, which may be used for the issuance of first mortgage bonds and debt securities; $280 million remains available for issuance pursuant to state regulatory authority; and


•	IDACORP's and Idaho Power's issuance of commercial paper, which may be issued up to an amount equal to the available credit capacity under their respective credit facilities.

IDACORP and Idaho Power monitor capital markets with a view toward opportunistic debt and equity transactions, taking into account current and potential future long-term needs. As a result, IDACORP may issue debt securities or common stock, and Idaho Power may issue debt securities or first mortgage bonds, if the companies believe terms available in the capital markets are favorable and that issuances would be financially prudent.

In March 2018, Idaho Power issued $220 million in principal amount of 4.20% first mortgage bonds, Series K, maturing on March 1, 2048. In April 2018, Idaho Power redeemed, prior to maturity, its $130 million in principal amount of 4.50% first mortgage bonds, medium-term notes due March 2020. In accordance with the redemption provisions of the original terms of the notes, the redemption included payment by Idaho Power of a make-whole premium of $4.6 million. Idaho Power used a portion of the net proceeds of the March 2018 sale of first mortgage bonds, medium-term notes to effect the redemption.

Based on planned capital expenditures and other O&M expenses, the companies believe they will be able to meet capital and debt service requirements and fund corporate expenses during at least the next twelve months with a combination of existing cash, operating cash flows generated by Idaho Power's utility business, availability under existing credit facilities, and access to commercial paper and long-term debt markets.

IDACORP and Idaho Power seek to maintain capital structures of approximately 50 percent debt and 50 percent equity, and maintaining this ratio influences IDACORP's and Idaho Power's debt and equity issuance decisions. As of September 30, 2018 , IDACORP's and Idaho Power's capital structures, as calculated for purposes of applicable debt covenants, were as follows:



	IDACORP	Idaho Power
Debt	44%	46%
Equity	56%	54%

IDACORP and Idaho Power generally maintain their cash and cash equivalents in highly liquid investments, such as U.S. Treasury Bills, money market funds, and bank deposits.

Operating Cash Flows

IDACORP’s and Idaho Power’s operating cash inflows for the nine months ended September 30, 2018 , were $366 million and $320 million , respectively, an increase of $20 million and a decrease of $40 million , respectively, compared with the same period in 2017 . Significant items that affected the comparability of the companies' operating cash flows in the first nine months of 2018 compared with the same period in 2017 were as follows:


•	net income increased $27 million , for the reasons described in "Results of Operations" above in this MD&A;


•	changes in deferred taxes and in taxes accrued and receivable combined to decrease cash flows by $29 million at IDACORP and increase cash flows by $8 million at Idaho Power;


•	changes in regulatory assets and liabilities, mostly related to the relative amounts of costs deferred and collected under the Idaho PCA mechanism, decreased operating cash flows by $11 million ;


•	changes in working capital balances due primarily to timing, including fluctuations in accounts receivable, other current assets, and accounts payable, as follows:


◦	timing of collections of accounts receivable balances increased operating cash flows by $17 million for IDACORP and Idaho Power. For IDACORP, the increase was offset by IDACORP's collection in 2017 of $8 million from a legal settlement; and


◦	timing of accounts payable payments increased operating cash flows by $26 million for IDACORP and decreased operating cash flows by $76 million for Idaho Power (the difference relates to the timing of estimated income tax payments from Idaho Power to IDACORP).

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Investing Cash Flows

Investing activities consist primarily of capital expenditures related to new construction and improvements to Idaho Power’s generation, transmission, and distribution facilities. IDACORP’s and Idaho Power’s net investing cash outflows for the nine months ended September 30, 2018 , were $170 million . Investing cash outflows for 2018 and 2017 were primarily for construction of utility infrastructure needed to address Idaho Power’s aging plant and equipment, customer growth, and environmental and regulatory compliance requirements. During the nine months ended September 30, 2018 , Idaho Power received $21 million in payments from transmission project co-participants pursuant to the terms of the joint funding arrangements for their share of costs.

Financing Cash Flows

Financing activities provide supplemental cash for both day-to-day operations and capital requirements, as needed. Idaho Power funds liquidity needs for capital investment, working capital, managing commodity price risk, and other financial commitments through cash flows from operations, debt offerings, commercial paper markets, credit facilities, and capital contributions from IDACORP. IDACORP funds its cash requirements, such as payment of taxes, capital contributions to Idaho Power, and non-utility expenses allocated to IDACORP, through cash flows from operations, commercial paper markets, sales of common stock, and credit facilities.

IDACORP's and Idaho Power's net financing cash outflows for the nine months ended September 30, 2018 were $11 million and $7 million , respectively. In March 2018, Idaho Power issued $220 million in first mortgage bonds. In April 2018, Idaho Power redeemed, prior to maturity, $130 million in principal amount of 4.50% first mortgage bonds, medium-term notes due March 2020. In accordance with the redemption provisions of the original terms of the notes, the redemption included payment by Idaho Power of a make-whole premium of $4.6 million. Idaho Power also expects to receive an incremental net benefit to net income as a result of the lower interest rate of the notes issued in March 2018 compared to the interest rate associated with the redeemed notes. Financing cash flows also included the payment of $90 million of dividends on common stock during the first nine months of 2018.

Financing Programs and Available Liquidity

IDACORP Equity Programs: In recent years, IDACORP has entered into sales agency agreements under which IDACORP could offer and sell shares of its common stock from time to time through a third-party agent. The most recent sales agency agreement terminated in May 2016. In May 2016, IDACORP filed a shelf registration statement with the SEC, which became effective upon filing, for the potential offer and sale of an unspecified amount of shares of common stock. IDACORP has no current plans to issue equity securities other than under its equity compensation plans during 2018, and as of the date of this report, IDACORP has not pursued the execution of a new sales agency agreement.

Idaho Power First Mortgage Bonds : Idaho Power's issuance of long-term indebtedness is subject to the approval of the IPUC, OPUC, and Wyoming Public Service Commission (WPSC). In April and May 2016, Idaho Power received orders from the IPUC, OPUC, and WPSC authorizing the company to issue and sell from time to time up to $500 million in aggregate principal amount of debt securities and first mortgage bonds, subject to conditions specified in the orders. Authority from the IPUC is effective through May 31, 2019, subject to extension upon request to the IPUC. The OPUC’s and WPSC’s orders do not impose a time limitation for issuances, but the OPUC order does impose a number of other conditions, including a requirement that the interest rates for the debt securities or first mortgage bonds fall within either (a) designated spreads over comparable U.S. Treasury rates or (b) a maximum interest rate limit of seven percent.

In September 2016, Idaho Power entered into a selling agency agreement with seven banks named in the agreement in connection with the potential issuance and sale from time to time of up to $500 million in aggregate principal amount of first mortgage bonds, secured medium term notes, Series K (Series K Notes), under Idaho Power’s Indenture of Mortgage and Deed of Trust, dated as of October 1, 1937, as amended and supplemented (Indenture). At the same time, Idaho Power entered into the Forty-eighth Supplemental Indenture, dated as of September 1, 2016, to the Indenture (Forty-eighth Supplemental Indenture). The Forty-eighth Supplemental Indenture provides for, among other items, (a) the issuance of up to $500 million in aggregate principal amount of Series K Notes pursuant to the Indenture and (b) the increase of the maximum amount of obligations to be secured by the Indenture to $2.5 billion (which maximum amount may be further increased or decreased by Idaho Power without the consent of the holders of first mortgage bonds). As of the date of this report, Idaho Power has $280 million available for the issuance of first mortgage bonds, including Series K Notes, or debt securities under the selling agency agreement.

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The Indenture limits the amount of first mortgage bonds at any one time outstanding to $2.5 billion, and as a result, the maximum amount of additional first mortgage bonds Idaho Power could issue as of September 30, 2018 was limited to approximately $669 million. Separately, the Indenture also limits the amount of additional first mortgage bonds that Idaho Power may issue to the sum of (a) the principal amount of retired first mortgage bonds and (b) 60 percent of total unfunded property additions, as defined in the Indenture. As of September 30, 2018 , Idaho Power could issue approximately $1.8 billion of additional first mortgage bonds based on retired first mortgage bonds and total unfunded property additions.

IDACORP and Idaho Power Credit Facilities : In November 2015, IDACORP and Idaho Power entered into Credit Agreements for $100 million and $300 million credit facilities, respectively, replacing prior credit agreements. Each of the credit facilities may be used for general corporate purposes and commercial paper back-up. IDACORP's facility permits borrowings under a revolving line of credit of up to $100 million at any one time outstanding, including swingline loans not to exceed $10 million at any time and letters of credit not to exceed $50 million at any time. IDACORP's facility may be increased, subject to specified conditions, to $150 million. Idaho Power's facility permits borrowings through the issuance of loans and standby letters of credit of up to $300 million at any one time outstanding, including swingline loans not to exceed $30 million at any one time and letters of credit not to exceed $100 million at any one time outstanding. Idaho Power's facility may be increased, subject to specified conditions, to $450 million. The credit facilities currently provide for a maturity date of November 4, 2022. Other terms and conditions of the credit facilities are described in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017, in Part II, Item 7 - "MD&A - Liquidity and Capital Resources."

Each facility contains a covenant requiring each company to maintain a leverage ratio of consolidated indebtedness to consolidated total capitalization equal to or less than 65 percent as of the end of each fiscal quarter. In determining the leverage ratio, "consolidated indebtedness" broadly includes all indebtedness of the respective borrower and its subsidiaries, including, in some instances, indebtedness evidenced by certain hybrid securities (as defined in the credit agreement). "Consolidated total capitalization" is calculated as the sum of all consolidated indebtedness, consolidated stockholders' equity of the borrower and its subsidiaries, and the aggregate value of outstanding hybrid securities. At September 30, 2018 , the leverage ratios for IDACORP and Idaho Power were 44 percent and 46 percent , respectively. IDACORP's and Idaho Power's ability to utilize the credit facilities is conditioned upon their continued compliance with the leverage ratio covenants included in the credit facilities. There are additional covenants, subject to exceptions, that prohibit certain mergers, acquisitions, and investments, restrict the creation of certain liens, and prohibit entering into any agreements restricting dividend payments from any material subsidiary.

At September 30, 2018 , IDACORP and Idaho Power believed they were in compliance with all facility covenants. Further, IDACORP and Idaho Power do not believe they will be in violation or breach of their respective debt covenants during 2018 .

Without additional approval from the IPUC, the OPUC, and the WPSC, the aggregate amount of short-term borrowings by Idaho Power at any one time outstanding may not exceed $450 million. Idaho Power has obtained approval of the state public utility commissions of Idaho, Oregon, and Wyoming for the issuance of short-term borrowings through November 2022.

IDACORP and Idaho Power Commercial Paper: IDACORP and Idaho Power have commercial paper programs under which they issue unsecured commercial paper notes up to a maximum aggregate amount outstanding at any time not to exceed the available capacity under their respective credit facilities, described above. IDACORP's and Idaho Power's credit facilities are available to the companies to support borrowings under their commercial paper programs. The commercial paper issuances are used to provide an additional financing source for the companies' short-term liquidity needs. The maturities of the commercial paper issuances will vary but may not exceed 270 days from the date of issue. Individual instruments carry a fixed rate during their respective terms, although the interest rates are reflective of current market conditions, subjecting the companies to fluctuations in interest rates.

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Available Short-Term Borrowing Liquidity

The table below outlines available short-term borrowing liquidity as of the dates specified (in thousands).



	September 30, 2018					December 31, 2017
	IDACORP ⁽²⁾		Idaho Power			IDACORP ⁽²⁾		Idaho Power
Revolving credit facility	$	100,000	$	300,000		$	100,000	$	300,000
Commercial paper outstanding	—		—			—		—
Identified for other use ⁽¹⁾	—		(24,245		)	—		(24,245		)
Net balance available	$	100,000	$	275,755		$	100,000	$	275,755

⁽¹⁾ Port of Morrow and American Falls bonds that Idaho Power could be required to purchase prior to maturity under the optional or mandatory purchase provisions of the bonds, if the remarketing agent for the bonds is unable to sell the bonds to third parties.

⁽²⁾ Holding company only.

At October 26, 2018 , IDACORP had no loans outstanding under its credit facilities and had no commercial paper outstanding. Idaho Power had no loans outstanding under its credit facilities and no commercial paper outstanding. During the three and nine months ended September 30, 2018 , IDACORP and Idaho Power borrowed no short-term commercial paper.

Impact of Credit Ratings on Liquidity and Collateral Obligations

IDACORP’s and Idaho Power’s access to capital markets, including the commercial paper market, and their respective financing costs in those markets, depend in part on their respective credit ratings. There have been no changes to IDACORP's or Idaho Power's ratings or ratings outlook by Standard & Poor’s Ratings Services or Moody’s Investors Service from those included in the companies' Annual Report on Form 10-K for the year ended December 31, 2017 . However, any rating can be revised upward or downward or withdrawn at any time by a rating agency if it decides that the circumstances warrant the change.

Idaho Power maintains margin agreements relating to its wholesale commodity contracts that allow performance assurance collateral to be requested of and/or posted with certain counterparties. As of September 30, 2018 , Idaho Power had posted $0.6 million of performance assurance collateral related to these contracts. Should Idaho Power experience a reduction in its credit rating on its unsecured debt to below investment grade, Idaho Power could be subject to requests by its wholesale counterparties to post additional performance assurance collateral, and counterparties to derivative instruments and other forward contracts could request immediate payment or demand immediate ongoing full daily collateralization on derivative instruments and contracts in net liability positions. Based upon Idaho Power’s current energy and fuel portfolio and market conditions as of September 30, 2018 , the amount of additional collateral that could be requested upon a downgrade to below investment grade is approximately $6.2 million. To minimize capital requirements, Idaho Power actively monitors its portfolio exposure and the potential exposure to additional requests for performance assurance collateral through sensitivity analysis.

Capital Requirements

Idaho Power's construction expenditures, excluding AFUDC, were $190 million during the nine months ended September 30, 2018 . The table below presents Idaho Power's expected cash requirements for construction, excluding AFUDC, for 2018 (including amounts incurred to-date) through 2022 (in millions).

Major Infrastructure Projects: Idaho Power is engaged in the development of a number of significant projects and has entered into arrangements with third parties concerning joint infrastructure development. The discussion below provides a summary of developments in certain of those projects since the discussion of these matters included in Part II, Item 7 - "MD&A - Capital Requirements" in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 . The discussion below should be read in conjunction with that report.

Boardman-to-Hemingway Transmission Line : The Boardman-to-Hemingway line, a proposed 300-mile, 500-kV transmission project between a station near Boardman, Oregon and the Hemingway station near Boise, Idaho, would provide transmission service to meet future resource needs. In January 2012, Idaho Power entered into a joint funding agreement with PacifiCorp and the Bonneville Power Administration to pursue permitting of the project. The joint funding agreement provides that Idaho Power's interest in the permitting phase of the project would be approximately 21 percent, and that during future negotiations

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relating to construction of the transmission line Idaho Power would seek to retain that percentage interest in the completed project. Total cost estimates for the project are between $1.0 billion and $1.2 billion, including Idaho Power's AFUDC. This cost estimate is preliminary and excludes the impacts of inflation and price changes of materials and labor resources that may occur following the date of the estimate.

Approximately $99 million, including AFUDC, has been expended on the Boardman-to-Hemingway project through September 30, 2018 . Pursuant to the terms of the joint funding arrangements, Idaho Power has received approximately $69 million as of September 30, 2018 , including $21 million received in 2018, due from project co-participants for their share of costs. As of the date of this report, no material co-participant reimbursements are outstanding. Joint permitting participants are obligated to reimburse Idaho Power for their share of any future project permitting expenditures incurred by Idaho Power.

The permitting phase of the Boardman-to-Hemingway project is subject to federal review and approval by the U.S. Bureau of Land Management (BLM), the U.S. Forest Service, the Department of the Navy, and certain other federal agencies. The BLM issued its record of decision for the project in November 2017, approving a right-of-way grant for the project to cross approximately 86 miles of BLM-administered land. The U.S. Forest Service released its draft record of decision in June 2018 proposing to allow the project to cross approximately 7 miles of National Forest lands. Idaho Power expects the U.S. Forest Service to issue its final decision by the end of 2018. Idaho Power also expects the Department of the Navy to issue its decision on whether to approve the project to cross approximately 7 miles of Department of the Navy lands by the end of 2018. In the separate Oregon state permitting process, in September 2018, Idaho Power's application for site certificate was deemed complete by the Oregon Department of Energy (ODOE). The ODOE is expected to issue a draft proposed order on the application in early 2019 providing the ODOE's recommendation on whether to issue a site certificate for construction in Oregon. Given the status of ongoing permitting activities and the construction period, Idaho Power expects the in-service date for the transmission line to be in 2025 or beyond.

Gateway West Transmission Line : Idaho Power and PacifiCorp are pursuing the joint development of the Gateway West project, a 500-kV transmission project between a station located near Douglas, Wyoming and the Hemingway station located near Boise, Idaho. Idaho Power and PacifiCorp have a joint funding agreement for permitting of the project. Idaho Power has expended approximately $37 million, including AFUDC, for its share of the permitting phase of the project through September 30, 2018 . As of the date of this report, Idaho Power estimates the total cost for its share of the project (including both permitting and construction) to be between $250 million and $450 million, including AFUDC.

The permitting phase of the Gateway West project was subject to review and approval of the BLM. The BLM released its record of decision in November 2013 for eight of the ten transmission line segments. In May 2017, a federal bill was signed into law that issued a right-of-way for certain portions of the remaining Gateway West segments. In April 2018, the BLM published its record of decision for the outstanding portions of the remaining segments. Idaho Power and PacifiCorp continue to coordinate the timing of next steps to best meet customer and system needs.

Defined Benefit Pension Plan Contributions

Idaho Power has no minimum contribution requirement to its defined benefit pension plan in 2018; however, after evaluating market conditions and expected 2018 cash flows, Idaho Power contributed $40 million to the plan during the first nine months of 2018. The contribution was applied to IDACORP's 2017 tax return. Idaho Power's contributions are made in a continued effort to balance the regulatory collection of these expenditures with the amount and timing of contributions and to mitigate the cost of being in an underfunded position. The primary impact of pension contributions is on the timing of cash flows, as the timing of cost recovery lags behind contributions.

Contractual Obligations

During the nine months ended September 30, 2018 , IDACORP's and Idaho Power's contractual obligations, outside the ordinary course of business, did not change materially from the amounts disclosed in their Annual Report on Form 10-K for the year ended December 31, 2017 , except that Idaho Power entered into power purchase agreements with solar, biomass, and hydro PURPA-qualifying facilities that increased Idaho Power's contractual payment obligations by approximately $57 million over the 20-year terms of the contracts.

Off-Balance Sheet Arrangements

IDACORP's and Idaho Power's off-balance sheet arrangements have not changed materially from those reported in MD&A in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 .

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REGULATORY MATTERS

Introduction

Idaho Power's development of regulatory filings takes into consideration short-term and long-term needs for rate relief and involves several factors that can affect the timing of these filings. These factors include, among others, the in-service dates of major capital investments, the timing and magnitude of changes in major revenue and expense items, and customer growth rates. Idaho Power's most recent general rate cases in Idaho and Oregon were filed during 2011, and Idaho Power filed a large single-issue rate case for the Langley Gulch power plant in Idaho and Oregon in 2012. These significant rate cases resulted in the resetting of base rates in both Idaho and Oregon during 2012. Idaho Power also reset its base-rate power supply expenses in the Idaho jurisdiction for purposes of updating the collection of costs through retail rates in 2014 but without a resulting net increase in rates. Between general rate cases, Idaho Power relies upon customer growth, a fixed cost adjustment mechanism, power cost adjustment mechanisms, tariff riders, and other mechanisms to mitigate the impact of regulatory lag, which refers to the period of time between making an investment or incurring an expense and recovering that investment or expense and earning a return. Management's regulatory focus in recent years has been largely on regulatory settlement stipulations and the design of rate mechanisms. Idaho Power continues to assess the need and timing of filing a general rate case in its two retail jurisdictions, based on its consideration of factors such as those described above, but does not anticipate filing a general rate case in the next twelve months.

The outcomes of significant proceedings are described in part in this report and further in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 . In addition to the discussion below, which includes notable regulatory developments since the discussion of these matters in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 , refer to Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report for additional information relating to Idaho Power's regulatory matters and recent regulatory filings and orders.

Notable Rate Changes During 2018

During 2018, Idaho Power received orders authorizing the rate changes summarized in the table below.



Description	Status	Estimated Rate Impact ⁽¹⁾	Notes
Power Cost Adjustment Mechanism - Idaho	New PCA rate became effective June 1, 2018	$22.6 million PCA decrease for the period from June 1, 2018 to May 31, 2019	The potential revenue impact of rate increases and decreases associated with the Idaho PCA mechanism is largely offset by associated increases and decreases in actual power supply costs and amortization of deferred power supply costs.
Fixed Cost Adjustment Mechanism - Idaho	New FCA rate became effective June 1, 2018	$19.4 million FCA decrease for the period from June 1, 2018 to May 31, 2019	The FCA is designed to remove a portion of Idaho Power’s financial disincentive to invest in energy efficiency programs by partially separating (or decoupling) the recovery of fixed costs from the volumetric kilowatt-hour charge and instead linking it to a set amount per customer.
Tax Cuts and Jobs Act Settlement Stipulation - Idaho	New base rate became effective June 1, 2018	On an annual basis, $18.7 million reduction of customer base rates, commencing on June 1, 2018	See "Income Tax Reform - Impact and Regulatory Treatment" below for more information.
Tax Cuts and Jobs Act Settlement Stipulation - Idaho	New PCA rate became effective June 1, 2018	One-time benefit of a $7.8 million decrease to be provided throu gh the PCA mech anism rates for the period from June 1, 2018 through May 31, 2019	For the income tax benefits accrued from January 1, 2018 to May 31, 2018, and the income tax benefits related to Idaho Power's OATT. See "Income Tax Reform - Impact and Regulatory Treatment" below for more information.

⁽¹⁾ The annual amount collected in rates is typically not recovered on a straight-line basis (i.e., 1/12th per month), and is instead recovered in proportion to retail sales volumes.

Customer-Owned Generation Filing

In July 2017, Idaho Power filed an application with the IPUC related to customers who install their own on-site generation, seeking the creation of two new classes of customers, with no request to change pricing or compensation. In May 2018, the IPUC issued an order authorizing the creation of the new customer classes. In that order, the IPUC also stated its intent to open

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an Idaho Power-specific docket to comprehensively study on-site generation and ordered Idaho Power to file a study with the IPUC exploring fixed-cost recovery prior to its next general rate case. In June 2018, the IPUC issued an order requiring further investigation to resolve eligibility issues for the new customer classes. In an order on reconsideration in September 2018, the IPUC ordered that all on-site generation customers under the two new classes remain classified as such. On October 19, 2018, Idaho Power filed petitions requesting that the IPUC open two new cases to study fixed-cost recovery, and the costs and benefits of and the proper rate design for on-site generation, respectively.

Idaho Earnings Support and Sharing from Idaho Settlement Stipulation

In October 2014, the IPUC issued an order (October 2014 Idaho Earnings Support and Sharing Settlement Stipulation) approving an extension, with modifications, of the terms of a December 2011 Idaho settlement stipulation for the period from 2015 through 2019, or until the terms are otherwise modified or terminated by order of the IPUC or the full $45 million of additional accumulated deferred investment tax credits (ADITC) amortization contemplated by the settlement stipulation has been amortized. The more specific terms and conditions of the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation are described in Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report. IDACORP and Idaho Power believe that the terms allowing additional amortization of ADITC in the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation provide the companies with a greater degree of earnings stability than would be possible without the terms of the stipulation in effect.

Based on its estimate of full-year 2018 Idaho ROE, in the third quarter of 2018, Idaho Power recorded a $1.5 million provision against current revenues for sharing of earnings with customers for 2018 under the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation. During the first nine months of 2017, Idaho Power recorded no sharing of earnings with customers.

Income Tax Reform - Impact and Regulatory Treatment

In December 2017, the Tax Cuts and Jobs Act was signed into law, which, among other things, lowered the corporate federal income tax rate from 35 percent to 21 percent and modified or eliminated certain federal income tax deductions for corporations. In March 2018, Idaho House Bill 463 was signed into law reducing the Idaho state corporate income tax rate from 7.4 percent to 6.925 percent. In January 2018, the IPUC issued an order requiring utilities within its jurisdiction, including Idaho Power, to (1) record a regulatory liability for the estimated Idaho-jurisdictional share of financial benefits after January 1, 2018, from the changes in federal income tax law under the Tax Cuts and Jobs Act, and (2) file a report with the IPUC by March 30, 2018, identifying and quantifying the financial impact of the income tax changes on the utility, along with proposed tariff schedule changes that would adjust the utility's rates and corresponding revenues to reflect the utility's modified federal tax obligations under the Tax Cuts and Jobs Act. The IPUC order required Idaho Power to estimate the income tax reform changes by comparing actual 2017 federal income tax components with what those federal income tax components would have been if the Tax Cuts and Jobs Act had been effective for the full-year 2017.

In March 2018, Idaho Power made a filing with the IPUC providing the results of its pro forma analysis indicating pro forma annual income tax reform expense reductions, composed of a current income tax expense reduction and a deferred income tax expense reduction. In May 2018, the IPUC issued an order approving a settlement stipulation (May 2018 Idaho Tax Reform Settlement Stipulation) related to income tax reform. Beginning June 1, 2018, the settlement stipulation provides an annual (a) $18.7 million reduction to Idaho customer base rates and (b) $7.4 million amortization of existing regulatory deferrals for specified items or future amortization of other existing or future unspecified regulatory deferrals that would otherwise be a future liability recoverable from Idaho customers. Additionally, a one-time benefit of a $7.8 million rate reduction is being provided to Idaho customers throu gh PCA mech anism rates for the period from June 1, 2018 through May 31, 2019, for the income tax reform benefits accrued from January 1, 2018 to May 31, 2018, and the income tax reform benefits related to Idaho Power's OATT. The amount provided via the PCA mechanism will decrease to $2.7 million on June 1, 2019, for income tax reform benefits related to Idaho Power's OATT and will cease on June 1, 2020, to reflect the impact of a full year of reduced OATT third-party transmission revenues.

The May 2018 Idaho Tax Reform Settlement Stipulation provides for the extension of the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation described above beyond the initial termination date of December 31, 2019, with modified terms related to the ADITC and revenue sharing mechanism to become effective beginning January 1, 2020. Neither the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation nor the May 2018 Idaho Tax Reform Settlement Stipulation impose a moratorium on Idaho Power filing a general rate case or other form of rate proceeding in Idaho during their respective terms.

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Also in May 2018, the OPUC issued an order approving a settlement stipulation that provides for an annual $1.5 million reduction to Oregon customer base rates beginning June 1, 2018, through May 31, 2020, related to income tax reform. Unless resolved in a regulatory proceeding before, the settlement stipulation requires Idaho Power to file a deferral request with the OPUC by December 31, 2019, to begin tracking tax reform benefits beginning January 1, 2020, at which time Idaho Power, the OPUC staff, and other interested parties will discuss the methodology to quantify potential future tax reform benefits. The settlement stipulation also deemed prudent Idaho Power's decision to pursue the end of its participation in coal-fired operations of Unit 1 at the Valmy Plant and approved Idaho Power's request to recover $2.5 million of annual incremental accelerated depreciation relating to Unit 1, beginning June 1, 2018 and ending December 31, 2019.

For more information on the settlement stipulations and their impacts on results, see Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report.

Change in Deferred Net Power Supply Costs and the Power Cost Adjustment Mechanisms

Deferred (accrued) power supply costs represent certain differences between Idaho Power's actual net power supply costs and the costs included in its retail rates, the latter being based on annual forecasts of power supply costs. Deferred (accrued) power supply costs are recorded on the balance sheets for future recovery or refund through customer rates.

The table that follows summarizes the change in deferred (accrued) net power supply costs during the nine months ended September 30, 2018 (in thousands).



	Idaho			Oregon			Total
Deferred (accrued) net power supply costs at December 31, 2017	$	(2,201	)	$	(105	)	$	(2,306	)
Current period net power supply costs accrued	(35,236		)	—			(35,236		)
Tax reform revenue accrual to be refunded through Idaho PCA	(4,244		)	—			(4,244		)
Western EIM cost recovery to be collected through Idaho PCA	1,412			—			1,412
Prior amounts refunded through rates	1,007			6			1,013
SO ₂ allowance and renewable energy certificate sales	(2,297		)	(69		)	(2,366		)
Interest and other	(174		)	(6		)	(180		)
Deferred (accrued) net power supply costs at September 30, 2018	$	(41,733	)	$	(174	)	$	(41,907	)

Idaho Power's power cost adjustment mechanisms in its Idaho and Oregon jurisdictions address the volatility of power supply costs and provide for annual adjustments to the rates charged to retail customers. The power cost adjustment mechanisms and associated financial impacts are described in "Results of Operations" in this MD&A and in Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report. With the exception of power supply expenses incurred under PURPA and certain demand response program costs that are passed through to customers substantially in full, the Idaho PCA mechanism allows Idaho Power to pass through to customers 95 percent of the differences in actual net power supply expenses as compared with base net power supply expenses, whether positive or negative. Thus, the primary financial statement impact of power supply cost deferrals or accruals is that the timing of when cash is paid out for power supply expenses differs from when those costs are recovered from customers, impacting operating cash flows from year to year.

Open Access Transmission Tariff Draft Posting

Idaho Power uses a formula rate for transmission service provided under its OATT, which allows transmission rates to be updated annually based primarily on financial and operational data Idaho Power files with the FERC. In August 2018, Idaho Power filed its 2018 final transmission rate with the FERC, reflecting a transmission rate of $31.25 per kW-year, to be effective for the period from October 1, 2018, to September 30, 2019. A "kW-year" is a unit of electrical capacity equivalent to 1 kilowatt of power used for 8,760 hours. Idaho Power's final rate was based on a net annual transmission revenue requirement of $123.1 million. The OATT rate in effect from October 1, 2017, to September 30, 2018, was $34.90 per kW-year based on a net annual transmission revenue requirement of $130.4 million. The decrease in the OATT rate is largely attributable to an increase in short-term transmission revenues in 2017, which serves as an offset to the transmission revenue requirement.

Western Energy Imbalance Market Costs

Idaho Power's participation in the Western EIM commenced on April 4, 2018. The Western EIM is intended to reduce the power supply costs to serve customers through more efficient dispatch within the hour of a larger and more diverse pool of resources, to integrate intermittent power from renewable generation sources more effectively, and to enhance reliability. In August 2016, Idaho Power filed an application with the IPUC requesting specified regulatory accounting treatment associated with its

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participation in the Western EIM. In January 2017, the IPUC issued an order authorizing deferral accounting treatment for costs associated with joining the Western EIM. In November 2017, Idaho Power filed an application with the IPUC requesting authorization to establish an interim method of recovery for Western EIM-related costs. In July 2018, the IPUC issued an order approving a settlement stipulation that provides for recovery through Idaho Power's PCA mechanism. For more information on the order and its impact on financial results, see Note 3 - "Regulatory Matters" to the condensed consolidated financial statements included in this report.

Renewable and Other Energy Contracts

Idaho Power has contracts for the purchase of electricity produced by third-party owned generation facilities, most of which produce energy with the use of renewable generation sources such as wind, solar, biomass, small hydroelectric and geothermal. The majority of these contracts are entered into as mandatory purchases under PURPA. As of September 30, 2018 , Idaho Power had contracts to purchase energy from 128 on-line PURPA projects. An additional three contracts are with non-PURPA projects, including the Elkhorn Valley wind project with a 101-MW nameplate capacity. The following table sets forth, as of September 30, 2018 , the resource type and nameplate capacity of Idaho Power's signed agreements for power purchases from PURPA and non-PURPA generating facilities. These agreements have original contract terms ranging from one to 35 years.



Resource Type	Total On-line mega-watts (MW)	Under Contract but not yet On-line (MW)	Total Projects under Contract (MW)
PURPA:
Wind	627	—	627
Solar	290	27	317
Hydroelectric	147	2	149
Other	56	—	56
Total	1,120	29	1,149
Non-PURPA:
Wind	101	—	101
Geothermal	35	—	35
Total	136	—	136

Of the six projects not yet on-line, one hydroelectric project and five solar projects are scheduled to be on-line in 2019.

Relicensing of Hydroelectric Projects

In connection with Idaho Power's efforts to relicense the HCC, Idaho Power's largest hydroelectric complex and a major relicensing effort, as described in more detail in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 , in Part II, Item 7 - "Regulatory Matters," Idaho Power has filed water quality certification applications, required under Section 401 of the Clean Water Act (CWA), with the states of Idaho and Oregon requesting that each state certify that any discharges from the project comply with applicable state water quality standards. Section 401 of the CWA requires that a state either approve or deny a Section 401 water quality certification application within one year of the filing of the application or the state may be considered to have waived its certification authority under the CWA. As a consequence, Idaho Power has been filing and withdrawing its Section 401 certification applications with Oregon and Idaho on an annual basis while it has been working with the states to identify measures that will provide reasonable assurance that discharges from the HCC will adequately address applicable water quality standards. In the 2016 Section 401 certification application process, Oregon required Idaho Power to comply with fish passage and reintroduction conditions. Idaho's water quality certification, however, provides that Idaho Power shall take no action that may result in the reintroduction or establishment of spawning populations of any fish species into Idaho's waters without consultation with and express approval of the State of Idaho. In November 2016, Idaho Power filed a petition with the FERC requesting that the FERC resolve the conflict between Oregon's and Idaho's conditions and declare that the Federal Power Act pre-empts the Oregon state law. In January 2017, the FERC issued an order denying Idaho Power’s petition, stating that the petition for a declaratory order was premature, cannot realistically be considered separately from the issue of the states’ certification authority under the CWA Section 401, and raises issues that are beyond the FERC’s authority to decide. In February 2017, Idaho Power sought rehearing before the FERC on the January 2017 order, which the FERC denied. In February 2018, Idaho Power filed an appeal of the FERC's January 2017 order with the D.C. Circuit Court, which is pending.

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In April 2017, the governors of Oregon and Idaho jointly requested that Idaho Power withdraw and resubmit its Section 401 certification applications in both states to allow the states additional time to negotiate a potential resolution of the disputed issues. Idaho Power subsequently withdrew its Section 401 certification applications in both states and since that time the states have been negotiating towards a mutually agreeable solution. Idaho Power most recently resubmitted its application to both states in June 2018 with the intent to allow additional time for the states to continue negotiating.

Costs for the relicensing of Idaho Power's hydroelectric projects are recorded in construction work in progress until new multi-year licenses are issued by the FERC, at which time the charges are transferred to electric plant in service. Idaho Power expects to seek recovery of relicensing costs through the ratemaking process. Relicensing costs of $289 million (including AFUDC) for the HCC were included in construction work in progress at September 30, 2018 . As of the date of this report, the IPUC authorizes Idaho Power to include in its Idaho jurisdiction rates $8.8 million of AFUDC annually relating to the HCC relicensing project. Prior to the May 2018 Idaho Tax Reform Settlement Stipulation described in Note 3 - "Regulatory Matters," Idaho Power was collecting $10.7 million annually. Collecting these amounts currently will reduce future collections when HCC relicensing costs are approved for recovery in base rates. As of September 30, 2018 , Idaho Power's regulatory liability for collection of AFUDC relating to the HCC was approximately $131 million. Idaho Power is unable to predict the timing of issuance of a new license for the HCC, or the financial or operational requirements of a new license.

In December 2016, Idaho Power filed an application with the IPUC requesting a determination that Idaho Power's expenditures of $220.8 million through year-end 2015 on relicensing of the HCC were prudently incurred, and thus eligible for future inclusion in retail rates in a future regulatory proceeding. In December 2017, Idaho Power filed with the IPUC a settlement stipulation signed by Idaho Power, the IPUC staff, and a third party intervenor, recognizing that a total of $216.5 million in expenditures were reasonably incurred, and therefore should be eligible for inclusion in customer rates at a later date. As a result of filing the settlement stipulation, Idaho Power recorded a $5.0 million pre-tax charge in the fourth quarter of 2017, which included $4.3 million for costs incurred through 2015, as well as $0.7 million related to associated costs incurred in 2016 and 2017. In April 2018, the IPUC issued an order approving the settlement stipulation as filed with the IPUC and determined the associated costs to be reasonably and prudently incurred.

ENVIRONMENTAL MATTERS

Overview

Idaho Power is subject to a broad range of federal, state, regional, and local laws and regulations designed to protect, restore, and enhance the environment, including the Clean Air Act, the CWA, the Resource Conservation and Recovery Act, the Toxic Substances Control Act, the Comprehensive Environmental Response, Compensation and Liability Act, and the Endangered Species Act, among other laws. These laws are administered by a number of federal, state, and local agencies. In addition to imposing continuing compliance obligations and associated costs, these laws and regulations provide authority to regulators to levy substantial penalties for noncompliance, injunctive relief, and other sanctions. Idaho Power's three coal-fired power plants and three natural gas-fired combustion turbine power plants are subject to many of these regulations. Idaho Power's 17 hydroelectric projects are also subject to a number of water discharge standards and other environmental requirements.

Compliance with current and future environmental laws and regulations may:


•	increase the operating costs of generating plants;


•	increase the construction costs and lead time for new facilities;


•	require the modification of existing generation plants, which could result in additional costs;


•	require the curtailment or shut-down of existing generating plants; or


•	reduce the output from current generating facilities.

Current and future environmental laws and regulations may increase the cost of operating fossil fuel-fired generation plants and constructing new generation and transmission facilities, in large part through the substantial cost of permitting activities and the required installation of additional pollution control devices. In many parts of the United States, some higher-cost, high-emission coal-fired plants have ceased operation or the plant owners have announced a near-term cessation of operation, as the cost of compliance makes the plants uneconomical to operate. Beyond increasing costs generally, these environmental laws and regulations could affect IDACORP's and Idaho Power's results of operations and financial condition if the costs associated with these environmental requirements and early plant retirements cannot be fully recovered in rates on a timely basis. Part I - "Business - Environmental Regulation and Costs" in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 , includes a summary of Idaho Power's expected capital and operating expenditures for environmental matters during the period from 2018 to 2020. Given the uncertainty of future environmental regulations, Idaho Power is unable to predict its environmental-related expenditures beyond that time, though they could be substantial.

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A summary of notable environmental matters impacting, or expected to potentially impact, IDACORP and Idaho Power, is included in Part II, Item 7 - "MD&A - Environmental Issues" and "MD&A - Liquidity and Capital Resources - Capital Requirements - Environmental Regulation Costs" in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 . Developments in certain environmental matters relevant to Idaho Power are described below.

Endangered Species Act Matters

Overview: The listing of a species of fish, wildlife, or plants as threatened or endangered under the ESA may have an adverse impact on Idaho Power's ability to construct generation, transmission, or distribution facilities or relicense or operate its hydroelectric facilities. When a species is added to the federal list of threatened and endangered species, it is protected from “take,” which is defined to include harming the species. The ESA directs that, concurrent with a designation of a threatened or endangered species, and where prudent and determinable, the applicable agencies also designate “any habitat of such species which is then considered to be critical habitat.” The ESA also provides that each federal agency must ensure that any action they authorize, fund, or carry out is not likely to jeopardize the continued existence of a listed species or result in the destruction or adverse modification of its critical habitat. If an action is determined to result in adverse modification of critical habitat, the federal agency must adopt changes to the proposed action to avoid the adverse modification. These changes are often quite extensive and can affect the size, scope, and even the feasibility of a project moving forward. In February 2016, the U.S. Fish and Wildlife Service (USFWS) and the NMFS issued a set of regulatory and policy changes relating to critical habitat and adverse modification determinations under the ESA (2016 ESA Rules). While Idaho Power has yet to determine the ultimate impact of implementing those changes, taken as a whole, Idaho Power believes that the 2016 ESA Rules could result in the applicable agencies having greater authority in making designations of critical habitat and could increase the likelihood of adverse modification determinations.

In July 2018, the USFWS and the NMFS issued three proposals to revise ESA regulations (2018 ESA Proposals) related to the process and standards for listing species and designating critical habitat, the process for consultations with federal agencies under Section 7 of the ESA (including the definition of "destructive or adverse modification" of designated critical habitat), and the scope of protection of threatened species. Idaho Power believes that if the 2018 ESA Proposals are enacted, the regulations could reduce Idaho Power’s obligations for mitigation under the ESA related to various construction and relicensing projects.

Developments in Regulation of Sage Grouse Habitat: In February 2016, a lawsuit was filed in the U.S. District Court of Idaho challenging the BLM's sage grouse resource management and land use plan revisions that became effective in 2015 under the Federal Land Policy and Management Act. The lawsuit challenges the plans and associated environmental impact statements across the sage grouse range and alleges that the plans fail to ensure that sage grouse populations and habitats will be protected and restored in accordance with the best available science and legal mandates. Further, the complaint challenges certain exemptions provided for the Boardman-to-Hemingway and Gateway West transmission line projects. Idaho Power has intervened in the proceedings in an effort to support the exemptions provided for in the BLM's plans. If the exemptions are overturned, Idaho Power may be required to re-route the projects, which could lead to substantially higher construction and permitting costs and could delay construction.

In May 2016, a separate lawsuit was filed in the U.S. District Court of North Dakota, challenging the BLM's sage grouse resource management and land use plan revisions, including the exemptions provided for the Boardman-to-Hemingway and Gateway West transmission line projects. In October 2016, the plaintiffs amended their complaint to no longer challenge the exemptions; however, in December 2016, the North Dakota court transferred claims challenging certain Idaho land use plan amendments to the U.S. District Court for the District of Columbia. Idaho Power is participating in the proceedings in an effort to protect its interests.

In June 2017, the Secretary of the Interior issued an order directing the BLM to review the 2015 sage grouse resource management and land use plan revisions and to identify provisions that may require modification or rescission to address energy and other development of public lands. In May 2018, the BLM issued draft resource management plan amendments and draft environmental impact statements to modify the 2015 sage grouse plans to better align the plans with state plans, conservation measures and the Department of the Interior and BLM policy. The public comment period closed in August 2018. As of the date of this report, the above lawsuits are stayed as the parties and the courts have agreed that the processes initiated by the BLM may result in further administrative actions that could remove the need for the lawsuits.

Clean Water Act Matters

Definition of “Waters of the United States” Under the CWA : On August 28, 2015, the EPA's and U.S. Army Corps of Engineers' final rule defining the phrase "waters of the United States" under the CWA became effective (WOTUS Rule). Idaho

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Power believes that the final rule potentially expanded federal jurisdiction under the CWA beyond traditional navigable waters, interstate waters, territorial seas, tributaries, and adjacent wetlands, to a number of other waters, including waters with a "significant nexus" to those traditional waters. The WOTUS Rule was widely challenged in both federal district and circuit courts. The State of Idaho, and several other parties, challenged the rule in North Dakota federal court. That court held that it had jurisdiction and enjoined the implementation of the WOTUS Rule. In February 2017, President Trump issued an executive order directing the EPA and the U.S. Army Corps of Engineers to rescind the WOTUS Rule. In July 2017, the EPA and the U.S. Army Corps of Engineers issued a notice of their intent to rescind and replace the definition of "waters of the United States" under the CWA, which Idaho Power expects would reduce the number of waters in Idaho Power's service area subject to the WOTUS Rule. In November 2017, the EPA issued a notice that it will delay the effectiveness of the WOTUS Rule until 2020 while the U.S. Army Corps of Engineers considers a replacement rule. In January 2018, the U.S. Supreme Court issued a unanimous ruling that challenges to the WOTUS Rule must begin with the federal district courts, effectively negating a nationwide stay issued by the Sixth Circuit in 2016. However, because the State of Idaho remains a party to the federal court action in North Dakota, that court’s enjoinder remains in effect, meaning the WOTUS Rule currently does not apply to actions brought in Idaho. In July 2018, the EPA and the U.S. Army Corps of Engineers issued a supplemental notice seeking additional comment on their 2017 proposal to repeal the definition of the term WOTUS Rule under the CWA. In August 2018, the U.S. District Court for the District of South Carolina issued a nationwide injunction on the EPA’s suspension of the WOTUS Rule, resulting in the WOTUS Rule taking effect in twenty-six states and Washington D.C. The WOTUS Rule does not currently apply in twenty-eight states, including Idaho, and litigation over both the WOTUS Rule and the EPA’s suspension of the WOTUS Rule continues.

Idaho Power has analyzed the WOTUS Rule and expects that, even if the WOTUS Rule is reinstated in Idaho, while it may cause Idaho Power to incur additional permitting, regulatory requirements, and other costs associated with the rule, the aggregate amount of increased costs is unlikely to have a material adverse effect on Idaho Power's operations or financial condition, in part due to the relatively arid climate of Idaho Power's service area. Similarly, because the CWA, as interpreted even prior to the WOTUS Rule, applies to most of Idaho Power's facilities, including its hydroelectric plants, Idaho Power does not expect that the repeal of the WOTUS Rule will have a material benefit to Idaho Power's operations or financial condition.

Clean Power Plan:

In June 2014, the EPA released, under Section 111(d) of the CAA, a proposed rule for addressing GHG from existing fossil fuel-fired electric generating units (EGUs). The proposed rule was intended to achieve a 30 percent reduction in CO ₂ emissions from the power sector by 2030. In August 2015, the EPA released the final rule under Section 111(d) of the CAA, referred to as the Clean Power Plan (CPP), which required states to adopt plans to collectively reduce 2005 levels of power sector CO ₂ emissions by 32 percent by the year 2030. The final rule provided states until September 2018 to submit implementation plans, phasing in several compliance periods beginning in 2022 and achieving the final emissions goals by 2030. In August 2018, the EPA proposed the Affordable Clean Energy (ACE) rule to replace the CPP under Section 111(d) of the CAA for existing electric utility generating units. The new proposed rule is limited to reduction and compliance measures that occur at the physical location of each plant, removing the proposal to require reductions outside the boundaries of plants. The ACE rule also provides for more state-specific control over implementation of the rule to address greenhouse gas emissions from existing coal-fired power plants, with a focus on state evaluation of improvement potential, technical feasibility, applicability, and remaining useful life of each unit.

Because the rule is premised on state implementation plans, the terms of which Idaho Power does not control, and due to the existing and potential changes in legislation, regulation, and government policy with respect to environmental matters as a result of the presidential administration's executive orders and the EPA's proposal to repeal and replace the CPP with the ACE rule discussed above, as of the date of this report and in light of these executive actions, Idaho Power is uncertain whether and to what extent the replacement ACE rule may impact its operations in the near term.

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Clean Air Act Matters

Overview: In addition to the CAA developments related to GHG emissions described above, several other regulatory programs developed under the CAA apply to Idaho Power. These include the final Mercury and Air Toxics Standards (MATS), National Ambient Air Quality Standards (NAAQS), New Source Review / Prevention of Significant Deterioration Rules, and the Regional Haze Rule.

MATS Implementation: The final MATS rule under the CAA, previously referred to as the Utility MACT Rule, was issued in February 2012. The final rule established emission limits for hazardous air pollutants from new and existing coal-fired and oil-fired steam electric generating units. The MATS rule provided that sources must be in compliance with emission limits by April 2015. Idaho Power and the plant co-owners have installed mercury continuous emission monitoring systems on all of the coal-fired units at the Jim Bridger, Boardman, and North Valmy coal-fired generating plants, along with control technology to reduce mercury, acid gases, and particulate matter emissions for purposes of compliance with the MATS rule. Legal challenges relating to the MATS rule, to which Idaho Power is not a party and pursuant to which the EPA is performing a court-mandated cost analysis for the rule, are pending. In August 2018, the EPA began reconsidering the justification behind the MATS rule and reviewing the regulations emissions standards. Idaho Power believes that as of the date of this report, its jointly-owned coal-fired plants are in compliance with the MATS rule, and does not expect the EPA’s review of the MATS rule to have a significant impact on Idaho Power’s operations or financial results.

National Ambient Air Quality Standards: The CAA requires the EPA to set ambient air quality standards for six "criteria" pollutants considered harmful to public health and the environment. These six pollutants are carbon monoxide, lead, ozone, particulate matter, nitrogen dioxide (NO ₂ ), and sulfur dioxide (SO ₂ ). States are then required to develop emission reduction strategies through State Implementation Plans, or SIPs, based on attainment of these ambient air quality standards. Recent developments and pending actions related to certain of those items relevant to Idaho Power include the following:

•

NO ₂ : In 2010, the EPA adopted a new NAAQS for NO ₂ at a level of 100 parts per billion averaged over a 1-hour period. In connection with the new NAAQS, in February 2012, the EPA issued a final rule designating all of the counties in Idaho, Nevada, Oregon, and Wyoming where Idaho Power owns or has an interest in a natural gas or coal-fired power plant as “unclassifiable/attainment” for NO ₂ . The EPA indicated it would review the designations after 2015, when three years of air quality monitoring data are available. Since January 2018, the EPA has finalized designations of “unclassifiable/attainment” for NO ₂ for all areas in which Idaho Power owns or has an interest in a natural gas or coal-fired power plant.

•

SO ₂ : In 2010, the EPA adopted a new NAAQS for SO ₂ at a level of 75 parts per billion averaged over a one-hour period. In 2011, the states of Idaho, Nevada, Oregon, and Wyoming sent letters to the EPA recommending that all counties in these states be classified as "unclassifiable" under the new one-hour SO ₂ NAAQS because of a lack of definitive monitoring and modeling data. In February 2013, the EPA issued letters to the states of Idaho and Oregon, finding that the most recent air quality data for those states showed no violations of the 2010 SO ₂ standard. Since January 2018, the EPA has finalized designations of “unclassifiable/attainment” for SO ₂ for all areas in which Idaho Power owns or has an interest in a natural gas or coal-fired power plant.

•

Ozone : In late 2014, the EPA issued a proposed rule that would update the ozone standard under the CAA, from 75 parts per billion over an eight-hour period to 65 to 70 parts per billion over an eight-hour period. On October 1, 2015, the EPA issued a final rule lowering the national ozone standard under the CAA to 70 parts per billion. The EPA stated that the vast majority of U.S. counties will meet the standards by 2025 with federal and state rules and programs now in place or underway. Since January 2018, the EPA has determined that all of the counties in which Idaho Power owns or has an interest in a natural gas or coal-fired power plant meet the standard. Idaho Power expects the EPA to finalize designations for those counties by the end of 2018.

As of the date of this report and based on the EPA designations described above, Idaho Power does not expect these standards to significantly impact its operations or materially increase Idaho Power’s capital and operating costs.

OTHER MATTERS

Critical Accounting Policies and Estimates

IDACORP's and Idaho Power's discussion and analysis of their financial condition and results of operations are based upon their condensed consolidated financial statements, which have been prepared in accordance with generally accepted accounting

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principles. The preparation of these financial statements requires IDACORP and Idaho Power to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues, and expenses and related disclosure of contingent assets and liabilities. On an ongoing basis, IDACORP and Idaho Power evaluate these estimates, including those estimates related to rate regulation, retirement benefits, contingencies, asset impairment, income taxes, unbilled revenues, and bad debt. These estimates are based on historical experience and on other assumptions and factors that are believed to be reasonable under the circumstances, and are the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. IDACORP and Idaho Power, based on their ongoing reviews, make adjustments when facts and circumstances dictate.

IDACORP’s and Idaho Power’s critical accounting policies are reviewed by the audit committees of the boards of directors. These policies have not changed materially from the discussion of those policies included under "Critical Accounting Policies and Estimates" in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 .

Recently Issued Accounting Pronouncements

For a listing of new and recently adopted accounting standards, see Note 1 - "Summary of Significant Accounting Policies" to the notes to the condensed consolidated financial statements included in this report.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

IDACORP is exposed to market risks, including changes in interest rates, changes in commodity prices, credit risk, and equity price risk. The following discussion summarizes material changes in these risks since December 31, 2017 , and the financial instruments, derivative instruments, and derivative commodity instruments sensitive to changes in interest rates, commodity prices, and equity prices that were held at September 30, 2018 . IDACORP has not entered into any of these market-risk-sensitive instruments for trading purposes.

Interest Rate Risk

IDACORP manages interest expense and short- and long-term liquidity through a combination of fixed rate and variable rate debt. Generally, the amount of each type of debt is managed through market issuance, but interest rate swap and cap agreements with highly - rated financial institutions may be used to achieve the desired combination.

Variable Rate Debt : As of September 30, 2018 , IDACORP had no net floating rate debt, as the carrying value of short-term investments exceeded the carrying value of outstanding variable-rate debt.

Fixed Rate Debt : As of September 30, 2018 , IDACORP had $1.8 billion in fixed rate debt, with a fair market value of approximately $1.9 billion. These instruments are fixed rate and, therefore, do not expose the companies to a loss in earnings due to changes in market interest rates. However, the fair value of these instruments would increase by approximately $271.1 million if market interest rates were to decline by one percentage point from their September 30, 2018 levels.

Commodity Price Risk

IDACORP's exposure to changes in commodity prices is related to Idaho Power's ongoing utility operations that produce electricity to meet the demand of its retail electric customers. These changes in commodity prices are mitigated in large part by Idaho Power's Idaho and Oregon power cost adjustment mechanisms. To supplement its generation resources and balance its supply of power with the demand of its retail customers, Idaho Power participates in the wholesale marketplace. IDACORP's commodity price risk as of September 30, 2018 , had not changed materially from that reported in Item 7A of IDACORP's Annual Report on Form 10-K for the year ended December 31, 2017 . Information regarding Idaho Power’s use of derivative instruments to manage commodity price risk can be found in Note 11 - "Derivative Financial Instruments" to the condensed consolidated financial statements included in this report.

Credit Risk

IDACORP is subject to credit risk based on Idaho Power's activity with market counterparties. Idaho Power is exposed to this risk to the extent that a counterparty may fail to fulfill a contractual obligation to provide energy, purchase energy, or complete financial settlement for market activities. Idaho Power mitigates this exposure by actively establishing credit limits; measuring, monitoring, and reporting credit risk using appropriate contractual arrangements; and transferring of credit risk through the use of financial guarantees, cash, or letters of credit. Idaho Power maintains a current list of acceptable counterparties and credit limits.

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The use of performance assurance collateral in the form of cash, letters of credit, or guarantees is common industry practice. Idaho Power maintains margin agreements relating to its wholesale commodity contracts that allow performance assurance collateral to be requested of and/or posted with certain counterparties. As of September 30, 2018 , Idaho Power had posted $0.6 million performance assurance collateral related to these contracts. Should Idaho Power experience a reduction in its credit rating on Idaho Power's unsecured debt to below investment grade Idaho Power could be subject to requests by its wholesale counterparties to post additional performance assurance collateral. Counterparties to derivative instruments and other forward contracts could request immediate payment or demand immediate ongoing full daily collateralization on derivative instruments and contracts in net liability positions. Based upon Idaho Power's energy and fuel portfolio and market conditions as of September 30, 2018 , the amount of collateral that could be requested upon a downgrade to below investment grade was approximately $6.2 million. To minimize capital requirements, Idaho Power actively monitors the portfolio exposure and the potential exposure to additional requests for performance assurance collateral calls through sensitivity analysis.

IDACORP's credit risk related to uncollectible accounts, net of amounts reserved, as of September 30, 2018 , had not changed materially from that reported in Item 7A of IDACORP's Annual Report on Form 10-K for the year ended December 31, 2017 . Additional information regarding Idaho Power’s management of credit risk and credit contingent features can be found in Note 11 - "Derivative Financial Instruments" to the condensed consolidated financial statements included in this report.

Equity Price Risk

IDACORP is exposed to price fluctuations in equity markets, primarily through Idaho Power's defined benefit pension plan assets, a mine reclamation trust fund owned by an equity-method investment of Idaho Power, and other equity security investments at Idaho Power. The equity securities held by the pension plan and in such accounts are diversified to achieve broad market participation and reduce the impact of any single investment, sector, or geographic region. Idaho Power has established asset allocation targets for the pension plan holdings, which are described in Note 10 - "Benefit Plans" to the consolidated financial statements included in IDACORP's Annual Report on Form 10-K for the year ended December 31, 2017 .

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ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

IDACORP : The Chief Executive Officer and the Chief Financial Officer of IDACORP, based on their evaluation of IDACORP’s disclosure controls and procedures (pursuant to Rule 13a-15(b) of the Securities Exchange Act of 1934 (Exchange Act)) as of September 30, 2018 , have concluded that IDACORP’s disclosure controls and procedures (as defined in Rule 13a-15(e) of the Exchange Act) are effective as of that date.

Idaho Power : The Chief Executive Officer and the Chief Financial Officer of Idaho Power, based on their evaluation of Idaho Power’s disclosure controls and procedures (pursuant to Rule 13a-15(b) of the Exchange Act) as of September 30, 2018 , have concluded that Idaho Power’s disclosure controls and procedures (as defined in Rule 13a-15(e) of the Exchange Act) are effective as of that date.

Changes in Internal Control over Financial Reporting

There have been no changes in IDACORP's or Idaho Power's internal control over financial reporting during the quarter ended September 30, 2018 , that have materially affected, or are reasonably likely to materially affect, IDACORP's or Idaho Power's internal control over financial reporting.

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PART II – OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

None

ITEM 1A. RISK FACTORS

The factors discussed in Part I - Item 1A - "Risk Factors" in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2017 , could materially affect IDACORP’s and Idaho Power's business, financial condition, or future results. In addition to those risk factors and other risks discussed in this report, see "Cautionary Note Regarding Forward-Looking Statements" in this report for additional factors that could have a significant impact on IDACORP's or Idaho Power's operations, results of operations, or financial condition and could cause actual results to differ materially from those anticipated in forward-looking statements.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Restrictions on Dividends

See Note 6 - "Common Stock" to the condensed consolidated financial statements included in this report for a description of restrictions on IDACORP's and Idaho Power's payment of dividends.

Issuer Purchases of Equity Securities

During the quarter ended September 30, 2018 , IDACORP effected the following repurchases of its common stock:



Period	(a) Total Number of Shares Purchased ⁽¹⁾	(b) Average Price Paid per Share		(c) Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	(d) Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plans or Programs
July 1, 2018 - July 31, 2018	—	$	—	—	—
August 1, 2018 - August 31, 2018	590	97.85		—	—
September 1, 2018 - September 30, 2018	—	—		—	—
Total	590	$	97.85	—	—

⁽¹⁾ These shares were withheld for taxes upon vesting of restricted stock.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None

ITEM 4. MINE SAFETY DISCLOSURES

Information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K (17 CFR 229.104) is included in Exhibit 95.1 of this report, which is incorporated herein by reference.

ITEM 5. OTHER INFORMATION

None

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ITEM 6. EXHIBITS

The following exhibits are filed or furnished, as applicable, with the Quarterly Report on Form 10-Q for the quarter ended September 30, 2018 :



		Incorporated by Reference
Exhibit No.	Exhibit Description	Form	File No.	Exhibit No.	Date	Included Herewith

12.1	IDACORP, Inc. Computation of Ratio of Earnings to Fixed Charges and Supplemental Ratio of Earnings to Fixed Charges					X
12.2	Idaho Power Company Computation of Ratio of Earnings to Fixed Charges and Supplemental Ratio of Earnings to Fixed Charges					X
15.1	Letter Re: Unaudited Interim Financial Information					X
15.2	Letter Re: Unaudited Interim Financial Information					X
31.1	Certification of IDACORP, Inc. Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002					X
31.2	Certification of IDACORP, Inc. Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002					X
31.3	Certification of Idaho Power Company Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002					X
31.4	Certification of Idaho Power Company Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002					X
32.1	Certification of IDACORP, Inc. Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002					X
32.2	Certification of IDACORP, Inc. Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002					X
32.3	Certification of Idaho Power Company Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002					X
32.4	Certification of Idaho Power Company Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002					X
95.1	Mine Safety Disclosures					X
101.INS	XBRL Instance Document					X
101.SCH	XBRL Taxonomy Extension Schema Document					X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document					X
101.LAB	XBRL Taxonomy Extension Label Linkbase Document					X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document					X
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document					X

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned thereunto duly authorized.



		IDACORP, INC.
		(Registrant)



Date:	November 1, 2018	By:	/s/ Darrel T. Anderson
			Darrel T. Anderson
			President and Chief Executive Officer

Date:	November 1, 2018	By:	/s/ Steven R. Keen
			Steven R. Keen
			Senior Vice President, Chief Financial
			Officer, and Treasurer





		IDAHO POWER COMPANY
		(Registrant)



Date:	November 1, 2018	By:	/s/ Darrel T. Anderson
			Darrel T. Anderson
			President and Chief Executive Officer

Date:	November 1, 2018	By:	/s/ Steven R. Keen
			Steven R. Keen
			Senior Vice President, Chief Financial
			Officer, and Treasurer