SMLP Summit Midstream Partners LP

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION

Organization. Summit Midstream Partners, LP (including its subsidiaries, collectively “SMLP” or the “Partnership”) is a Delaware limited partnership that was formed in May 2012 and began operations in October 2012. SMLP is a value-oriented limited partnership focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in unconventional resource basins, primarily shale formations, in the continental United States. The Partnership’s business activities are conducted through various operating subsidiaries, each of which is owned or controlled by its wholly owned subsidiary holding company, Summit Holdings, a Delaware limited liability company.

GP Buy-In Transaction. On May 28, 2020, the Partnership closed the transactions contemplated by the Purchase Agreement (the “Purchase Agreement”), dated May 3, 2020, with affiliates of its sponsor at that time, Energy Capital Partners II, LLC (“ECP”), to acquire Summit Investments, the parent company of the General Partner. The acquisition of Summit Investments resulted in the Partnership acquiring (a) 2.3 million SMLP common units (34.6 million SMLP common units prior to the Partnership’s 1-for-15 reverse unit split of its common units, effective November 9, 2020 (the “Reverse Unit Split”)) that were pledged as collateral under the SMPH Term Loan, (b) 0.7 million SMLP common units (10.7 million SMLP common units prior to the Reverse Unit Split) that were not pledged as collateral under the SMPH Term Loan and (c) a deferred purchase price obligation receivable owed by the Partnership. In addition, the Partnership acquired 0.4 million SMLP common units held by an affiliate of ECP. The total purchase price was $35.0 million in cash and warrants giving ECP the right to purchase up to 0.7 million SMLP common units (10.0 million SMLP common units prior to the Reverse Unit Split) (refer to Note 9 – Partners’ Capital and Mezzanine Capital for additional details). Pursuant to the Purchase Agreement, the Partnership assumed the liabilities stemming from the release of produced water from a produced water pipeline operated by Meadowlark Midstream, a subsidiary of the Partnership, that occurred near Williston, North Dakota and was discovered on January 6, 2015. These transactions are collectively referred to as the “GP Buy-In Transaction.”

As a result of the GP Buy-In Transaction, the Partnership indirectly owns its General Partner. Following the closing of the GP Buy-In Transaction, the Partnership retired 1.1 million SMLP common units (16.6 million common units prior to the Reverse Unit Split) it acquired that were not pledged as collateral under the SMPH Term Loan. On November 17, 2020, the Partnership issued the 2.3 million SMLP common units (34.6 million common units prior to the Reverse Unit Split) that were pledged as collateral under the SMPH Term Loan as partial consideration for a consensual debt discharge and restructuring (the “TL Restructuring”) of its SMP Holdings’ $155.2 million term loan (“SMPH Term Loan”). SMP Holdings is a wholly-owned subsidiary of Summit Investments.

Under GAAP, the GP Buy-In Transaction was deemed a transaction among entities under common control with a change in reporting entity. Although SMLP is the surviving entity for legal purposes, Summit Investments is the surviving entity for accounting purposes; therefore, the historical financial results included herein, prior to the GP Buy-In Transaction are those of Summit Investments. Prior to the GP Buy-In Transaction, Summit Investments controlled SMLP and SMLP’s financial statements were consolidated into Summit Investments.

Business Operations. The Partnership provides natural gas gathering, compression, treating and processing services as well as crude oil and produced water gathering services pursuant to primarily long-term, fee-based agreements with its customers. The Partnership’s results are primarily driven by the volumes of natural gas that it gathers, compresses, treats and/or processes as well as by the volumes of crude oil and produced water that it gathers. Other than the Partnership’s investments in Double E and Ohio Gathering, all of its business activities are conducted through wholly owned operating subsidiaries.

Presentation and Consolidation. The Partnership prepares its condensed consolidated financial statements in accordance with GAAP as established by the FASB and pursuant to the rules and regulations of the SEC pertaining to interim financial information. The condensed consolidated financial statements contained in this report include all normal and recurring material adjustments that, in the opinion of management, are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented herein. The Partnership makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates.

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The condensed consolidated financial statements contained in this report include the assets, liabilities and results of operations of SMLP and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.

Risks and Uncertainties.  The Partnership is closely monitoring the impact of the COVID-19 pandemic on all aspects of its business, including how it has impacted and will impact its customers, employees, supply chain and distribution network. The Partnership is unable to predict the ultimate impact that COVID-19 may have on its business, future results of operations, financial position or cash flows.

Given the dynamic nature of the COVID-19 pandemic and related market conditions, the Partnership cannot reasonably estimate the period of time that these events will persist or the full extent of the impact they will have on its business. The full extent to which the Partnership’s operations may be impacted by the COVID-19 pandemic will depend largely on future developments, which are highly uncertain and cannot be accurately predicted, including changes in the severity of the pandemic, countermeasures taken by governments, businesses and individuals to slow the spread of the pandemic, and the development and availability of treatments and vaccines and the extent to which these treatments and vaccines may remain effective as potential new strains of the coronavirus emerge. Furthermore, the impacts of a potential worsening of global economic conditions and the continued disruptions to and volatility in the financial markets remain unknown.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP

Except for the below, there have been no changes to the Partnership’s significant accounting policies since December 31, 2020.

Cash, Cash Equivalents and Restricted Cash. We consider all highly liquid investments with an original maturity of three months or less to be cash equivalents. Cash that is held by a major bank and has restrictions on its availability to the Partnership is classified as restricted cash. The restricted cash balance of $8.1 million at March 31, 2021 is related to proceeds from the Permian Transmission Credit Facility, which can be used to finance Permian Transmission’s capital calls associated with its investment in Double E, for debt service or other general corporate purposes. See Note 7 - Debt for additional information.

Interest Rate Swaps. Interest rate swap agreements are reported as either assets or liabilities on the consolidated balance sheet at fair value. Interest rate swap agreements are not designated as cash-flow hedges, and accordingly, the changes in the fair value are recorded in earnings. The Partnership does not use interest rate swap agreements for speculative purposes.

New accounting standards recently implemented.

ASU No. 2018-13 Fair Value Measurement (“ASU 2018-13”). ASU 2018-13 updates the disclosure requirements on fair value measurements including new disclosures for the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. ASU 2018-13 modifies existing disclosures including clarifying the measurement uncertainty disclosure. ASU 2018-13 removes certain existing disclosure requirements including the amount and reasons for transfers between Level 1 and Level 2 fair value measurements and the policy for the timing of transfer between levels. The adoption of ASU 2018-13 on January 1, 2020 did not have a material impact on the Partnership’s consolidated financial statements or disclosures.

ASU No. 2016-13 Financial Instruments – Credit Losses (“ASU 2016-13”). ASU 2016-13 requires the use of a current expected loss model for financial assets measured at amortized cost and certain off-balance sheet credit exposures. Under this model, entities will be required to estimate the lifetime expected credit losses on such instruments based on historical experience, current conditions, and reasonable and supportable forecasts. This amended guidance also expands the disclosure requirements to enable users of financial statements to understand an entity’s assumptions, models and methods for estimating expected credit losses. The changes are effective for annual and interim periods beginning after December 15, 2019, and amendments should be applied using a modified retrospective approach. The adoption of ASU 2016-13 on January 1, 2020 did not have a material impact on the Partnership’s consolidated financial statements or disclosures.

New accounting standards not yet implemented.

ASU No. 2020-06 Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815 – 40) (“ASU 2020-06”). ASU 2020-06 simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s

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own equity. The ASU is part of the FASB’s simplification initiative, which aims to reduce unnecessary complexity in U.S. GAAP. The ASU’s amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. The Partnership is currently evaluating the provisions of ASU 2020-06 to determine its impact on the Partnership’s consolidated financial statements and disclosures.

ASU No. 2020-04 Reference Rate Reform (“ASU 2020-04”). ASU 2020-04 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by reference rate reform on financial reporting. The amendments in ASU 2020-04 are effective as of March 12, 2020 through December 31, 2022. The Partnership is currently evaluating the provisions of ASU 2020-04 to determine its impact on the Partnership’s consolidated financial statements and disclosures.

Revenue by Category.  In the following table, revenue is disaggregated by geographic area and major products and services.  For more detailed information about reportable segments, see Note 15 – Segment Information.

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Contract balances. Contract assets relate to the Partnership’s rights to consideration for work completed but not billed at the reporting date and consist of the estimated MVC shortfall payments expected from its customers and unbilled activity associated with contributions in aid of construction. Contract assets are transferred to trade receivables when the rights become unconditional. The following table provides information about contract assets from contracts with customers:

As of March 31, 2021, receivables with customers totaled $48.3 million and contract assets totaled $3.9 million and were included in the accounts receivable caption on the unaudited condensed consolidated balance sheets.

As of December 31, 2020, receivables with customers totaled $57.5 million and contract assets totaled $2.0 million which were included in the accounts receivable caption on the unaudited condensed consolidated balance sheets.

Contract liabilities (deferred revenue) relate to the advance consideration received from customers primarily for contributions in aid of construction. The Partnership recognizes contract liabilities under these arrangements in revenue over the contract period. For the three months ended March 31, 2021 and 2020, the Partnership recognized $1.1 million and $2.4 million of gathering services and related fees, respectively, which were included in the contract liability balance as of the beginning of the period. See Note 6 – Deferred Revenue for additional details.

Depreciation expense and capitalized interest for the Partnership follows.

5. EQUITY METHOD INVESTMENTS

Double E. The Partnership is responsible for leading the development, permitting and construction of the Double E Project. During the three month periods ended March 31, 2021 and 2020, the Partnership made cash investments of $5.6 million and $58.0 million, respectively, in the Double E Project. Other than the investment activity noted above, Double E did not have any results of operations for the three months ended March 31, 2021, given that the Double E Project is currently under development.

Ohio Gathering. As of March 31, 2021 and December 31, 2020, the Partnership’s ownership interest in Ohio Gathering was 38.0% and 38.2%, respectively. A reconciliation of the difference between the carrying amount of the Partnership’s interest in Ohio Gathering and the Partnership’s underlying investment per Ohio Gathering's books and records is provided in the table below as of March 31, 2021.

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A rollforward of noncurrent deferred revenue follows.

⁽¹⁾ Issuance costs are being amortized over the life of the notes.

Revolving Credit Facility.  The Partnership’s wholly owned subsidiary, Summit Holdings, has a senior secured revolving credit facility (the “Revolving Credit Facility”) which allows for revolving loans, letters of credit and swingline loans. The Revolving Credit Facility has a $1.1 billion borrowing capacity and matures on May 13, 2022. At March 31, 2021, the applicable margin under LIBOR borrowings was 2.75%, the interest rate was 2.86% and the unused portion of the Revolving Credit Facility totaled $275.9 million, subject to a commitment fee of 0.50%, after giving effect to the issuance of $22.1 million in outstanding but undrawn irrevocable standby letters of credit. Based on covenant limits, the Partnership’s available borrowing capacity under the Revolving Credit Facility as of March 31, 2021 was approximately $115.0 million.

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The Revolving Credit Facility includes three financial performance covenants which require Summit Holdings to maintain (i) a ratio of consolidated trailing 12-month earnings before interest, income taxes, depreciation and amortization (“EBITDA”) to net interest expense of not less than 2.50 to 1.00, as defined in the credit agreement, (ii) a ratio of total net indebtedness to consolidated trailing 12-month EBITDA of not more than 5.75 to 1.00 and (iii) a ratio of first lien net indebtedness to consolidated trailing 12-month EBITDA of not more than 3.50 to 1.00. As of and during the three months ended March 31, 2021, the Partnership was in compliance with the Revolving Credit Facility's financial covenants and there were no defaults or events of default.

Permian Transmission Credit Facility. On March 8, 2021 (the “Closing Date”), the Partnership’s unrestricted subsidiary, Permian Transmission, entered into a Credit Agreement which allows for $175.0 million of senior secured credit facilities (the “Permian Transmission Credit Facilities”), including a $160.0 million Term Loan Facility (the “Term Loan Facility”) and a $15.0 million Working Capital Facility (the “Working Capital Facility”). The Permian Transmission Credit Facilities can be used to finance Permian Transmission’s capital calls associated with its investment in Double E, debt service and other general corporate purposes. Unexpended proceeds from draws on the Permian Transmission Credit Facilities are classified as restricted cash on the accompanying condensed consolidated balance sheets.

The Permian Transmission Credit Facilities mature on the earlier of (i) the sixth anniversary of the term conversion date and (ii) seven years after the initial funding date, which occurred on the March 8, 2021. Loans under the Permian Transmission Credit Facilities are subject to varying rates of interest based on whether the loan is an Adjusted LIBOR borrowing (as defined in the credit agreement) or Alternate Base Rate (“ABR”) borrowing (as defined in the credit agreement). Adjusted LIBOR borrowings bear interest at (i) from the Closing Date to the fifth anniversary of the Closing Date, Adjusted LIBOR (as defined in the credit agreement) plus 2.375% and (ii) thereafter, Adjusted LIBOR plus 2.625%. ABR borrowings bear interest at (i) from the Closing Date to the fifth anniversary of the Closing Date, ABR (as defined in the credit agreement) plus 1.375% and (ii) thereafter, ABR plus 1.625%.

The term conversion date will occur upon satisfaction of customary conditions, including bringing the Double E project into service pursuant to its transportation agreements. The Permian Transmission Credit Facilities include customary representations and warranties, affirmative covenants, negative covenants, and events of default with customary cure periods, knowledge qualifiers and materiality qualifiers. Events of default include non-payment of principal and interest, noncompliance with affirmative and negative covenants, inaccuracy of representations and warranties, not achieving term conversion by a specified date, termination of material contracts, revocation of material permits and other customary events of default. Permian Transmission is required to take all actions, within its control, to comply with any such covenants that apply to Double E. Secured interests in the equity and assets of Permian Transmission, including its 70% direct membership interest in Double E, have been pledged as collateral under the Credit Facilities.

Upon term conversion, the Permian Transmission Credit Facilities will amortize based on a 10-year sculpted amortization schedule. Permian Transmission will also be required to maintain a 6-month debt service reserve, which can be supported by letters of credit issued under the Working Capital Facility. In addition, the Credit Facilities allow for restricted payments so long as there are no defaults or events of default, Permian Transmission maintains a 1.20x debt service coverage ratio and complies with the debt service reserve requirements and there is no breach of a material contract that would have a material adverse effect on distributions to Permian Transmission.

As of March 31, 2021, the applicable margin under Adjusted LIBOR borrowings was 2.375%, the interest rate was 2.5% and the unused portion of the Permian Transmission Credit Facilities totaled $157.5 million, subject to a commitment fee of 0.70% as of March 31, 2021. Based on covenant limits, the Partnership’s available borrowing capacity under the Permian Transmission Credit Facilities, as of March 31, 2021, was approximately $155.5 million. As of and during the period from the Closing Date to March 31, 2021, the Partnership was in compliance with the Permian Transmission Credit Facilities financial covenants. There were no defaults or events of default during the period from the Closing Date to March 31, 2021.

2022 Senior Notes. The 2022 Senior Notes are senior, unsecured obligations and rank equally in right of payment with all of our existing and future senior obligations. The 2022 Senior Notes are effectively subordinated in right of payment to all secured indebtedness, to the extent of the collateral securing such indebtedness.

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Summit Holdings and Finance Corp., the co-issuers of the 2022 Senior Notes (the “Co-Issuers”) may redeem all or part of the 2022 Senior Notes at a redemption price of 100.000%, plus accrued and unpaid interest, if any. Debt issuance costs of $5.1 million are being amortized over the life of the 2022 Senior Notes.

As of and during the three month period ended March 31, 2021, that Partnership was in compliance with the financial covenants governing its 2022 Senior Notes.

2025 Senior Notes. The 2025 Senior Notes are senior, unsecured obligations and rank equally in right of payment with all of the Partnership’s existing and future senior obligations. The 2025 Senior Notes are effectively subordinated in right of payment to all of the Partnership’s secured indebtedness, to the extent of the collateral securing such indebtedness.

As of March 31, 2021, the Co-Issuers have the right to redeem all or part of the 2025 Senior Notes at a redemption price of 104.313%. On and after April 15, 2021, the Co-Issuers may redeem all or part of the 2025 Senior Notes at a redemption price of 102.875% (with the redemption price declining ratably each year to 100.000% on April 15, 2023), plus accrued and unpaid interest, if any, to, but not including the redemption date. Debt issuance costs of $7.7 million are being amortized over the life of the 2025 Senior Notes.

As of and during the three month period ended March 31, 2021, that Partnership was in compliance with the financial covenants governing its 2025 Senior Notes.

The balance sheet carrying values for the Revolving Credit Facility and the Permian Transmission Credit Facility represent fair value due to their floating interest rates. The fair value for the Senior Notes is based on an average of nonbinding broker quotes as of March 31, 2021 and December 31, 2020. The use of different market assumptions or valuation methodologies may have a material effect on the estimated fair value of the Senior Notes.

Interest Rate Swaps. In connection with the 2021 establishment of the Permian Transmission Credit Facility, the Partnership entered into $161.5 million of notional amount interest rate swaps to manage its exposure to variability in expected cash flows attributable to interest rate risk. Interest rate swaps convert a portion of the Partnership’s variable rate debt to fixed rate debt.  The Partnership chooses counterparties for its derivative instruments that it believes are creditworthy at the time the transactions are entered into, and the Partnership actively monitors the creditworthiness where applicable. However, there can be no assurance that a counterparty will be able to meet its obligations to the Partnership. The Partnership presents its derivative positions on a gross basis and does not net the asset and liability positions.

As of March 31, 2021, the Partnership’s swap agreements had a fair value of less than $0.1 million and are recorded within Other assets on the condensed consolidated balance sheets.

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Series A Preferred Units.  In 2017, the Partnership issued 300,000 Series A Preferred Units at a price to the public of $1,000 per unit. As of March 31, 2021, the Partnership had 162,109 Series A Preferred Units outstanding. On March 10, 2021, the Partnership commenced an offer to exchange its Series A Preferred Units for up to 2,160,000 (the “Maximum Exchange Amount”) newly issued common units (the “2021 Exchange Offer”), with each participating holder receiving 27 common units for each Series A Preferred Unit properly tendered (and not validly withdrawn) (the “Exchange Consideration”). On March 23, 2021, the Partnership announced an increase of the Exchange Consideration to 30 common units for each Series A Preferred Unit properly tendered (and not validly withdrawn), and a corresponding increase in the Maximum Exchange Amount to 2,400,000 newly issued common units. The 2021 Exchange Offer expired on April 13, 2021. As a result of the 2021 Exchange Offer, the Partnership exchanged 18,662 Series A Preferred Units at a ratio of 30 common units per Series A Preferred Unit for a total of 538,715 SMLP common units, net of units withheld for withholding taxes. Upon completion of the 2021 Exchange Offer on April 15, 2021, the Partnership has 143,447 Series A Preferred Units outstanding. 

Subsidiary Series A Preferred Units.  The Partnership records its Subsidiary Series A Preferred Units at fair value upon issuance, net of issuance costs, and subsequently records an effective interest method accretion amount each reporting period to accrete the carrying value to a most probable redemption value that is based on a predetermined internal rate of return measure. If the Partnership elects to make payment-in-kind (“PIK”) distributions to holders of its Subsidiary Series A Preferred Units, these PIK distributions increase the liquidation preference on each Subsidiary Series A Preferred Unit. Net Income (Loss) attributable to common limited partners includes adjustments for PIK distributions and redemption accretion.

During the three months ended March 31, 2021, the Partnership elected to make PIK distributions and issued 1,494 Subsidiary Series A Preferred Units. As of March 31, 2021, the Partnership has 86,802 Subsidiary Series A Preferred Units issued and outstanding.

If the Subsidiary Series A Preferred Units were redeemed on March 31, 2021, the redemption amount would be $108.5 million when considering the applicable multiple of invested capital metric and make-whole amount provisions contained in the Subsidiary Series A Preferred Unit agreement.

The following table shows the change in our Subsidiary Series A Preferred Unit balance from January 1, 2021 to March 31, 2021:

Warrants.  On May 28, 2020, and in connection with the GP Buy-In Transaction, the Partnership issued (i) a warrant to purchase up to 537,307 SMLP common units (8,059,609 SMLP common units prior to the Reverse Unit Split) to ECP NewCo (the “ECP NewCo Warrant”) and (ii) a warrant to purchase up to 129,360 SMLP common units (1,940,391 SMLP common units prior to the Reverse Unit Split) to ECP Holdings (the “ECP Holdings Warrant” and together with the ECP NewCo Warrant, the “ECP Warrants”). The exercise price under the ECP Warrants is $15.345 per SMLP common unit ($1.025 prior to the Reverse Unit Split) and the Partnership may issue a maximum of 666,667 SMLP common units (10,000,000 SMLP common units prior to the Reverse Unit Split) under the ECP Warrants.

Upon exercise of the ECP Warrants, each of ECP NewCo and ECP Holdings may receive, at its election: (i) a number of SMLP common units equal to the number of SMLP common units for which the ECP Warrants are being exercised, if exercising the ECP Warrants by cash payment of the exercise price; (ii) a number of SMLP common units equal to the product of the number of common units being exercised multiplied by (a) the difference between the average of the daily volume-weighted average price (“VWAP”) of the SMLP common units on the NYSE on each of the three trading days prior to the delivery of the notice of exercise (the “VWAP Average”) and the exercise price (the “VWAP Difference”), divided by (b) the VWAP Average; and/or (iii) an amount in cash, to the extent that the payment of such cash would not result in any violation of any financial covenant under the Revolving Credit Facility, and the Partnership’s leverage ratio would be at least 0.5x less than the maximum

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applicable ratio set forth in the Revolving Credit Facility, equal to the product of (a) the number of SMLP common units exercised and (b) the VWAP Difference, subject to certain adjustments under the ECP Warrants.

The ECP Warrants are subject to standard anti-dilution adjustments for stock dividends, stock splits (including reverse splits) and recapitalizations and are exercisable at any time on or before May 28, 2023. Upon exercise of the ECP Warrants, the proceeds to the holders of the ECP Warrants, whether in the form of cash or common units, will be capped at $30.00 ($2.00 prior to the Reverse Unit Split) per SMLP common unit above the exercise price.

At March 31, 2021, the ECP Warrants were valued at $3.4 million using the Black-Scholes model and accounted for as a liability instrument.

Cash Distribution Policy. In connection with the GP Buy-In Transaction, the Partnership suspended its cash distributions to holders of its common units, commencing with respect to the quarter ending March 31, 2020. Upon the resumption of distributions, the Partnership Agreement requires that it distribute all available cash, subject to reserves established by its General Partner, within 45 days after the end of each quarter to unitholders of record on the applicable record date. The amount of distributions paid under this policy is subject to fluctuations based on the amount of cash the Partnership generates from its business and the decision to make any distribution is determined by the General Partner, taking into consideration the terms of the Partnership Agreement. The Partnership’s last distribution was paid on February 14, 2020, to unitholders of record at the close of business on February 7, 2020.

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12. UNIT-BASED AND NONCASH COMPENSATION

SMLP Long-Term Incentive Plan.  The Partnership’s Long-Term Incentive Plan (“SMLP LTIP”) provides for equity awards to eligible officers, employees, consultants and directors of the Partnership, thereby linking the recipients’ compensation directly to SMLP’s performance. Items to note:  

13. COMMITMENTS AND CONTINGENCIES

Environmental Matters.  Although the Partnership believes that it is in material compliance with applicable environmental regulations, the risk of environmental remediation costs and liabilities are inherent in pipeline ownership and operation. Furthermore, the Partnership can provide no assurances that significant environmental remediation costs and liabilities will not be incurred in the future. The Partnership is currently not aware of any material contingent liabilities that exist with respect to environmental matters, except as noted below.

In 2015, the Partnership learned of the rupture of a four-inch produced water gathering pipeline on the Meadowlark Midstream system near Williston, North Dakota (“Meadowlark Rupture”). The Meadowlark Rupture, which was covered by Summit Investments’ insurance policies, was subject to maximum coverage of $25.0 million from its pollution liability insurance policy and $200.0 million from its property and business interruption insurance policy. The pollution liability policy was exhausted in 2015. Prior to the GP Buy-In Transaction, Summit Investments and SMP Holdings indemnified the Partnership for certain obligations and liabilities related to the incident. As a result of the GP Buy-In Transaction, the Partnership is no longer indemnified for these obligations.

A rollforward of the Partnership’s undiscounted accrued environmental remediation follows and is primarily related to the Meadowlark Rupture.

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As of March 31, 2021, the Partnership has recognized (i) a current liability for remediation effort expenditures expected to be incurred within the next 12 months and (ii) a noncurrent liability for estimated remediation expenditures expected to be incurred subsequent to March 31, 2022. Each of these amounts represent the Partnership’s best estimate for costs expected to be incurred. Neither of these amounts have been discounted to its present value.

Beginning in 2015, the U.S. Department of Justice (“DOJ”) issued grand jury subpoenas to Summit Investments, the Partnership, our General Partner and Meadowlark Midstream requesting certain materials related to the Meadowlark Rupture. On June 19, 2015, Meadowlark Midstream and Summit Investments received a complaint from the North Dakota Industrial Commission seeking approximately $2.5 million in fines and other fees related to the incident. This matter is also under investigation by the U.S. Environmental Protection Agency, the North Dakota Office of the Attorney General, the North Dakota Department of Environmental Quality, and the North Dakota Game and Fish Department. The government’s investigation is still ongoing. During this time, the Partnership has entered ‎into tolling agreements with both the DOJ and the North Dakota attorney general, which ‎were most recently extended to July 7, 2021. There can be no assurance that these tolling agreements will be extended. Discussions with the DOJ and other agencies regarding a resolution of this matter are ongoing. Liability for this incident could arise under civil and misdemeanor and felony criminal statutes, including the Clean Water Act. In accordance with GAAP, the Partnership has accrued a $17.0 million loss contingency for this matter. While the Partnership believes a loss for claims and/or actions arising from the Meadowlark Rupture, whether in a negotiated settlement or as a result of litigation, is probable, due to the complexity of resolving the numerous issues surrounding this matter, at this time the Partnership cannot reasonably predict whether any actual loss, if incurred, would be materially higher or lower than the accrued amount.

Legal Proceedings. The Partnership is involved in various litigation and administrative proceedings arising in the normal course of business. In the opinion of management, any liabilities that may result from these claims or those arising in the normal course of business would not individually or in the aggregate have a material adverse effect on the Partnership's financial position or results of operations.

14. RESTRUCTURING

2020 Restructuring Activities. In 2020, management approved and initiated a plan to restructure its operations (“2020 Restructuring Plan”), resulting in certain management, facility and organizational changes. Under the 2020 Restructuring Plan, and during the quarterly period ended March 31, 2021, the Partnership expensed approximately $0.7 million of costs associated with these restructuring activities. These activities consisted primarily of employee-related severance costs, and are included within the General and administrative caption on the consolidated statement of operations. At March 31, 2021, the Partnership has accrued and unpaid liabilities of $1.0 million associated with the 2020 Restructuring Activities.

2019 Restructuring Activities. In 2019, management approved and initiated a plan to restructure its operations (“2019 Restructuring Plan”), resulting in certain management, facility and organizational changes. Under the 2019 Restructuring Plan, and during the quarterly period ended March 31, 2020, the Partnership expensed approximately $2.8 million of costs associated with these restructuring activities. These activities consisted primarily of employee-related costs and consulting costs in support of the project. These costs are included within the General and administrative caption on the consolidated statement of operations. At March 31, 2021, the Partnership has accrued and unpaid liabilities of less than $0.1 million associated with the 2019 Restructuring Activities.

15. SEGMENT INFORMATION

As of March 31, 2021, the Partnership’s reportable segments are:

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Each of the Partnership’s reportable segments provides midstream services in a specific geographic area. Reportable segments reflect the way in which the Partnership internally report’s the financial information used to make decisions and allocate resources in connection with the Partnership’s operations.

The Ohio Gathering reportable segment includes the Partnership’s investment in Ohio Gathering. Income or loss from equity method investees, as reflected on the statements of operations, relates to Ohio Gathering and is recognized and disclosed on a one-month lag.

For the three months ended March 31, 2021, other than the investment activity described in Note 5, Double E did not have any results of operations given that the Double E Project is currently under development. The Double E Project is expected to be operational in the fourth quarter of 2021.

Corporate and Other represents those results that: (i) are not specifically attributable to a reportable segment; (ii) are not individually reportable (such as Double E); or (iii) have not been allocated to a reportable segment for the purpose of evaluating their performance, including certain general and administrative expense items, certain natural gas and crude oil marketing services and transaction costs.

Assets by reportable segment follow.

Segment adjusted EBITDA by reportable segment follows.

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A reconciliation of income or loss before income taxes and income or loss from equity method investees to total of reportable segments' measures of profit follows.