ALLIANCE RESOURCE PARTNERS LP - Quarter Report: 2012 June (Form 10-Q)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

For the quarterly period ended June 30, 2012

OR

For the transition period from                      to                     

Commission File No.: 0-26823

ALLIANCE RESOURCE PARTNERS, L.P.

(Exact name of registrant as specified in its charter)

1717 South Boulder Avenue, Suite 400, Tulsa, Oklahoma 74119

(Address of principal executive offices and zip code)

(918) 295-7600

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has 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 registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    x   Yes    ¨   No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such

files).     x   Yes     ¨   No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (check one)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     ¨  Yes    x   No

As of August 8, 2012, 36,874,949 common units are outstanding.

Table of Contents

TABLE OF CONTENTS

PART I

FINANCIAL INFORMATION

PART II

OTHER INFORMATION

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PART I

FINANCIAL INFORMATION

ALLIANCE RESOURCE PARTNERS, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except unit data)

(Unaudited)

See notes to condensed consolidated financial statements.

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ALLIANCE RESOURCE PARTNERS, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except unit and per unit data)

(Unaudited)

See notes to condensed consolidated financial statements.

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ALLIANCE RESOURCE PARTNERS, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

See notes to condensed consolidated financial statements.

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ALLIANCE RESOURCE PARTNERS, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

See notes to condensed consolidated financial statements.

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ALLIANCE RESOURCE PARTNERS, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. ORGANIZATION AND PRESENTATION

Significant Relationships Referenced in Notes to Condensed Consolidated Financial Statements

Organization

ARLP is a Delaware limited partnership listed on the NASDAQ Global Select Market under the ticker symbol “ARLP.” ARLP was formed in May 1999 to acquire, upon completion of ARLP’s initial public offering on August 19, 1999, certain coal production and marketing assets of Alliance Resource Holdings, Inc., a Delaware corporation (“ARH”), consisting of substantially all of ARH’s operating subsidiaries, but excluding ARH. ARH is owned by Joseph W. Craft III, the President and Chief Executive Officer and a Director of our managing general partner, and Kathleen S. Craft. SGP, a Delaware limited liability company, is owned by ARH and holds a 0.01% general partner interest in each of ARLP and the Intermediate Partnership. We lease certain assets, including coal reserves and certain surface facilities, owned by SGP.

We are managed by our managing general partner, MGP, a Delaware limited liability company, which holds a 0.99% and a 1.0001% managing general partner interest in ARLP and the Intermediate Partnership, respectively, and a 0.001% managing member interest in Alliance Coal. AHGP is a Delaware limited partnership that was formed to become the owner and controlling member of MGP. AHGP completed its initial public offering on May 15, 2006. AHGP owns directly and indirectly 100% of the members’ interest of MGP, the incentive distribution rights (“IDR”) in ARLP and 15,544,169 common units of ARLP.

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Basis of Presentation

The accompanying condensed consolidated financial statements include the accounts and operations of the ARLP Partnership and present our financial position as of June 30, 2012 and December 31, 2011, the results of our operations and comprehensive income for the three and six months ended June 30, 2012 and 2011 and the cash flows for the six months ended June 30, 2012 and 2011. All of our intercompany transactions and accounts have been eliminated.

These condensed consolidated financial statements and notes are unaudited. However, in the opinion of management, these financial statements reflect all adjustments (which include only normal recurring adjustments) necessary for a fair presentation of the results for the periods presented. Results for interim periods are not necessarily indicative of results for a full year.

These condensed consolidated financial statements and notes are prepared pursuant to the rules and regulations of the Securities and Exchange Commission for interim reporting and should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2011.

Use of Estimates

The preparation of the ARLP Partnership’s condensed consolidated financial statements in conformity with generally accepted accounting principles (“GAAP”) of the United States (“U.S.”) requires management to make estimates and assumptions that affect the reported amounts and disclosures in our condensed consolidated financial statements. Actual results could differ from those estimates.

2. NEW ACCOUNTING STANDARDS

New Accounting Standards Issued and Adopted

In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2011-04, Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs (“ASU 2011-04”). ASU 2011-04 amends Accounting Standards Codification (“ASC”) 820, Fair Value Measurement, to provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. ASU 2011-04 changes certain fair value measurement principles and enhances the disclosure requirements particularly for Level 3 fair value measurements. ASU 2011-04 was effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. The adoption of ASU 2011-04 did not have a material impact on our condensed consolidated financial statements.

In June 2011, the FASB issued ASU 2011-05, Presentation of Comprehensive Income (“ASU 2011-05”). ASU 2011-05 removes the presentation options in ASC 220, Comprehensive Income, and requires entities to report components of comprehensive income in either a continuous statement of comprehensive income or two separate but consecutive statements. Under the two statement approach, the first statement would include components of net income, and the second statement would include components of other comprehensive income (“OCI”). ASU 2011-05 does not change the items that must be reported in OCI. ASU 2011-05 was effective for fiscal years, and interim periods within those years, beginning after December 15, 2011, and its provisions had to be applied retrospectively for all periods presented in the financial statements. In December 2011, the FASB issued ASU 2011-12, Comprehensive Income (Topic 220): Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05 (“ASU 2011-12”), which indefinitely deferred a provision of ASU 2011-05 that required entities to present reclassification adjustments out of accumulated other comprehensive income by component in both the statement in which net income is presented and the statement in which OCI is presented. The adoption of ASU 2011-05 did not have a material impact on our condensed consolidated financial statements.

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3. CONTINGENCIES

Various lawsuits, claims and regulatory proceedings incidental to our business are pending against the ARLP Partnership. We record an accrual for a potential loss related to these matters when, in management’s opinion, such loss is probable and reasonably estimable. Based on known facts and circumstances, we believe the ultimate outcome of these outstanding lawsuits, claims and regulatory proceedings will not have a material adverse effect on our financial condition, results of operations or liquidity. However, if the results of these matters were different from management’s current opinion and in amounts greater than our accruals, then they could have a material adverse effect.

4. ACQUISITION OF BUSINESS

On April 2, 2012, we acquired substantially all of Green River Collieries, LLC’s (“Green River”) assets related to its coal mining business and operations located in Webster and Hopkins Counties, Kentucky. The transaction includes the Onton No. 9 mining complex (“Onton mine”), which includes a dock, tugboat, and a lease for the preparation plant, and an estimated 40.0 million tons of coal reserves in the West Kentucky No. 9 coal seam. The Green River acquisition is consistent with our general business strategy and complements our current coal mining operations.

The following table summarizes the consideration paid to Green River and the recognized amount of assets acquired and liabilities assumed at the acquisition date (in thousands):

We are awaiting receipt of the final valuation report from the independent appraisal of the fair values of the assets acquired and liabilities assumed from Green River. As a result the purchase price allocation of the assets and capital lease obligation acquired is preliminary pending completion of the final analysis of all assets acquired and liabilities assumed.

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Intangible assets and liabilities related to coal supply agreements will be amortized over the average term of the contracts. Mine permits will be amortized over the estimated useful life of the Onton mine and the noncompete agreement will be amortized over the term of the agreement.

The following unaudited pro forma information for the ARLP Partnership has been prepared for illustrative purposes and assumes that the business combination occurred on January 1, 2011. The unaudited pro forma results have been prepared based upon Green River’s historical results with respect to the business we acquired and estimates of the effects of the transactions that we believe are reasonable and supportable. The results are not necessarily reflective of the consolidated results of operations had the acquisition actually occurred on January 1, 2011, nor are they indicative of future operating results.

The revenues and net income related to the acquired business are reflected in our condensed consolidated statements of income beginning April 2, 2012 and totaled $25.2 million and $1.8 million, respectively, which are included in the total revenues and net income above for the six months ended June 30, 2012.

The pro forma net income includes adjustments to depreciation, depletion and amortization to reflect the new basis in property, plant and equipment and intangible assets acquired, elimination of income tax expense, and the elimination of interest expense of Green River as its debt was paid off in conjunction with the acquisition. Acquisition costs related to the business acquired of $0.6 million were reclassified to the beginning of 2011, as the acquisition was assumed to have been completed January 1, 2011 for the pro forma presentation.

Synergies from the acquisition are not reflected in the pro forma results.

5. FAIR VALUE MEASUREMENTS

We apply the provisions of FASB ASC 820, Fair Value Measurement, which, among other things, defines fair value, requires disclosures about assets and liabilities carried at fair value and establishes a hierarchal disclosure framework based upon the quality of inputs used to measure fair value.

Valuation techniques are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our own market assumptions. These two types of inputs create the following fair value hierarchy:

The carrying amounts for cash equivalents, accounts receivable and accounts payable approximate fair value because of the short maturity of those instruments. At June 30, 2012 and December 31, 2011, the estimated fair value of our long-term debt, including current maturities, was approximately $759.4 million and $746.5 million, respectively, based on interest rates that we believe are currently available to us for issuance of debt with similar terms and remaining maturities (Note 6). The fair value of debt, which is based upon interest rates for similar instruments in active markets, is classified as a Level 2 measurement under the fair value hierarchy.

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6. LONG-TERM DEBT

Long-term debt consists of the following (in thousands):

On May 23, 2012, our Intermediate Partnership entered into a credit agreement (the “Credit Agreement”) with various financial institutions for a revolving credit facility (the “Revolving Credit Facility”) of $700 million and a term loan (the “Term Loan”) in the aggregate principal amount of $250 million (collectively, the Revolving Credit Facility and Term Loan are referred to as the “Credit Facility”). The Credit Facility replaces the $142.5 million revolving credit facility that would have matured September 25, 2012. Borrowings under the Credit Agreement bear interest at a Base Rate or Eurodollar Rate, at our election, plus an applicable margin which fluctuates depending upon the ratio of Consolidated Debt to Consolidated Cash Flow (as defined in the Credit Agreement). We have elected the Eurodollar Rate which, with applicable margin, was 1.9% on borrowings outstanding as of June 30, 2012. The Credit Facility matures May 23, 2017, at which time all amounts outstanding under the Revolving Credit Facility and the Term Loan are required to be repaid. Interest is payable quarterly, with principal of the Term Loan due as follows: commencing with the quarter ending June 30, 2014 and for each quarter thereafter ending on March 31, 2016, an amount per quarter equal to 2.50% of the aggregate amount of the Term Loan advances outstanding, 20% of the aggregate amount of the Term Loan advances outstanding per quarter beginning June 30, 2016 through December 31, 2016 with the remaining balance of the Term Loan advances being due May 23, 2017. We have the option to prepay the Term Loan at any time in whole or in part subject to terms and conditions described in the Credit Agreement. Upon a “change of control” (as defined in the Credit Agreement), the unpaid principal amount of the Credit Facility, all interest thereon and all other amounts payable under the Credit Agreement will become due and payable.

Also on May 23, 2012, our Intermediate Partnership terminated early its $300 million term loan agreement dated December 29, 2010. As of May 23, 2012, the aggregate unpaid principal amount of $300 million, including all accrued but unpaid interest, were repaid, using the proceeds of the Term Loan and borrowings under the Revolving Credit Facility. Our Intermediate Partnership did not incur any early termination penalties in connection with the prepayment of the term loan.

We incurred debt issuance costs of approximately $4.3 million in 2012 associated with the Credit Agreement, which have been deferred and are being amortized as a component of interest expense over the duration of the Credit Agreement. We expensed $1.1 million of previously deferred debt issuance costs associated with the terminated $300 million term loan.

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Our Intermediate Partnership has $54.0 million in senior notes (“Senior Notes”), $205.0 million in Series A and $145.0 million in Series B senior notes (collectively, the “2008 Senior Notes”) and the Credit Facility described above (collectively, the “ARLP Debt Arrangements”), which are guaranteed by all of the material direct and indirect subsidiaries of our Intermediate Partnership. The ARLP Debt Arrangements contain various covenants affecting our Intermediate Partnership and its subsidiaries restricting, among other things, the amount of distributions by our Intermediate Partnership, the incurrence of additional indebtedness and liens, the sale of assets, the making of investments, the entry into mergers and consolidations and the entry into transactions with affiliates, in each case subject to various exceptions. The ARLP Debt Arrangements also require the Intermediate Partnership to remain in control of a certain amount of mineable coal reserves relative to its annual production. In addition, the ARLP Debt Arrangements require our Intermediate Partnership to maintain the following: (a) debt to cash flow ratio of not more than 3.0 to 1.0 and (b) cash flow to interest expense ratio of not less than 3.0 to 1.0, in each case, during the four most recently ended fiscal quarters. The debt to cash flow ratio and cash flow to interest expense ratio were 1.24 to 1.0 and 16.2 to 1.0, respectively, for the trailing twelve months ended June 30, 2012. We were in compliance with the covenants of the ARLP Debt Arrangements as of June 30, 2012.

At June 30, 2012, we had borrowings of $55.0 million and $29.9 million of letters of credit outstanding with $615.1 million available for borrowing under the Revolving Credit Facility. We utilize the Revolving Credit Facility, as appropriate, to meet working capital requirements, anticipated capital expenditures and investments in affiliates, scheduled debt payments or distribution payments. We incur an annual commitment fee of 0.25% on the undrawn portion of the Revolving Credit Facility.

7. WHITE OAK TRANSACTIONS

On September 22, 2011 (the “Transaction Date”), we entered into a series of transactions with White Oak Resources LLC (“White Oak”) and related entities to support development of a longwall mining operation currently under construction. The transactions feature several components, including an equity investment in White Oak (represented by “Series A Units” containing certain distribution and liquidation preferences), the acquisition and leaseback of certain reserves and surface rights, a coal handling and services agreement and a backstop equipment financing facility. Our initial investment at the Transaction Date, using existing cash on hand, was $69.5 million and we committed to additionally fund approximately $330.5 million to $455.5 million over the next three to four years, of which $188.7 million was funded from the Transaction Date through June 30, 2012. We expect to fund these additional commitments using existing cash balances, future cash flows from operations, borrowings under revolving credit facilities and cash provided from the issuance of debt or equity. The following information discusses each component of these transactions in further detail.

Hamilton County, Illinois Reserve Acquisition

Our subsidiary, Alliance WOR Properties, LLC (“WOR Properties”) acquired from White Oak the rights to approximately 204.9 million tons of proven and probable high-sulfur coal reserves, of which 105.2 million tons are currently being developed for future mining by White Oak and certain surface properties and rights in Hamilton County, Illinois (the “Reserve Acquisition”), which is adjacent to White County, Illinois, where our White County Coal, LLC Pattiki mine is located. The asset purchase price of $33.8 million cash paid at closing was allocated to owned and leased coal rights. WOR Properties also provided $17.0 million to White Oak for the development of the acquired reserves between the Transaction Date and December 31, 2011. During the six months ended June 30, 2012, WOR Properties provided $34.6 million to White Oak for development of the acquired coal reserves and fulfilled its initial commitment for further development funding. WOR Properties has a remaining commitment of $54.6 million for additional coal reserve acquisitions.

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Equity Investment – Series A Units

Concurrent with the Reserve Acquisition, our subsidiary, Alliance WOR Processing, LLC (“WOR Processing”) made an equity investment of $35.7 million in White Oak to purchase Series A Units representing ownership in White Oak. WOR Processing also purchased $7.0 million of additional Series A Units between the Transaction Date and December 31, 2011. During the six months ended June 30, 2012, WOR Processing purchased $30.6 million of additional Series A Units.

WOR Processing’s ownership and member’s voting interest in White Oak at June 30, 2012 was 10.9% based upon currently outstanding voting units. The remainder of the equity ownership in White Oak, represented by Series B Units, is held by other investors and members of White Oak management.

We continually review all rights provided to WOR Processing and us by various agreements and continue to conclude all such rights are protective or participating in nature and do not provide WOR Processing or us the ability to unilaterally direct any of the primary activities of White Oak that most significantly impact its economic performance. As such, we recognize WOR Processing’s interest in White Oak as an equity investment in affiliate in our consolidated balance sheets. As of June 30, 2012, WOR Processing had invested $73.3 million in Series A Units of White Oak equity, which represents our current maximum exposure to loss as a result of our equity investment in White Oak. White Oak has made no distributions to WOR Processing or us.

We record WOR Processing’s equity in earnings or losses of affiliates under the hypothetical liquidation at book value method of accounting due to the preferences WOR Processing receives on distributions. For the three and six months ended June 30, 2012, we were allocated losses of $4.6 million and $8.6 million, respectively.

Services Agreement

Simultaneous with the closing of the Reserve Acquisition, WOR Processing entered into a Coal Handling and Preparation Agreement (“Services Agreement”) with White Oak pursuant to which WOR Processing committed to construct and operate a coal preparation plant and related facilities and a rail loop and loadout facility to service the White Oak longwall Mine No. 1. The expected cost to construct the facilities contemplated by the Services Agreement is approximately $99.5 million and will be expended by WOR Processing over the next three years. As of June 30, 2012, we have incurred $30.0 million of costs related to the facilities noted above, which is included in the property, plant and equipment, at cost line item in our condensed consolidated balance sheets. In addition, the Intermediate Partnership agreed to loan $10.5 million to White Oak for the construction of various assets on the surface property, including but not limited to, a bathhouse, office and warehouse (“Construction Loan”). The Construction Loan has a term of 20 years, with repayment scheduled to begin in 2015. White Oak has not used any amounts available under the Construction Loan as of June 30, 2012.

Equipment Financing Commitment

Also on the Transaction Date, the Intermediate Partnership committed to provide $100.0 million of fully collateralized equipment financing with a five-year term to White Oak for the purchase of coal mining equipment should other third-party funding sources not be available. During the second quarter of 2012, White Oak obtained third-party financing for the purchase of coal mining equipment, and on June 18, 2012, repaid the Intermediate Partnership the outstanding amount of $2.2 million for previous advances and interest due. White Oak also terminated early the equipment financing agreement with the Intermediate Partnership, and as part of the termination, paid the Intermediate Partnership a $2.0 million cancellation fee on June 18, 2012.

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8. NET INCOME PER LIMITED PARTNER UNIT

We apply the provisions of FASB ASC 260, Earnings Per Share (“FASB ASC 260”), which require the two-class method in calculating basic and diluted earnings per unit (“EPU”). Net income is allocated to the general partners and limited partners in accordance with their respective partnership percentages, after giving effect to any special income or expense allocations, including incentive distributions to our managing general partner, the holder of the IDR pursuant to our partnership agreement, which are declared and paid following the end of each quarter. Under the quarterly IDR provisions of our partnership agreement, our managing general partner is entitled to receive 15% of the amount we distribute in excess of $0.275 per unit, 25% of the amount we distribute in excess of $0.3125 per unit, and 50% of the amount we distribute in excess of $0.375 per unit. Our partnership agreement contractually limits our distributions to available cash; therefore, undistributed earnings of the ARLP Partnership are not allocated to the IDR holder. In addition, our outstanding awards under our Long-Term Incentive Plan (“LTIP”) and phantom units in notional accounts under our Supplemental Executive Retirement Plan (“SERP”) and the MGP Amended and Restated Deferred Compensation Plan for Directors (“Deferred Compensation Plan”) include rights to nonforfeitable distributions or distribution equivalents and are therefore considered participating securities. As such, we allocate undistributed and distributed earnings to these outstanding awards in our calculation of EPU.

The following is a reconciliation of net income used for calculating basic earnings per unit and the weighted average units used in computing EPU for the three and six months ended June 30, 2012 and 2011, respectively, (in thousands, except per unit data):

9. WORKERS’ COMPENSATION AND PNEUMOCONIOSIS

The changes in the workers’ compensation liability (including current and long-term liability balances) for each of the periods presented were as follows (in thousands):

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Certain of our mine operating entities are liable under state statutes and the Federal Coal Mine Health and Safety Act of 1969, as amended, to pay pneumoconiosis, or black lung, benefits to eligible employees and former employees and their dependents. Components of the net periodic benefit cost for each of the periods presented are as follows (in thousands):

10. COMPENSATION PLANS

Long-Term Incentive Plan

We have the LTIP for certain employees and officers of our managing general partner and its affiliates who perform services for us. The LTIP awards are grants of non-vested “phantom” or notional units, which upon satisfaction of vesting requirements, entitle the LTIP participant to receive ARLP common units. Annual grant levels and vesting provisions for designated participants are recommended by our President and Chief Executive Officer, subject to review and approval of the compensation committee of the MGP board of directors (the “Compensation Committee”). On January 25, 2012, the Compensation Committee determined that the vesting requirements for the 2009 grants of 9,125 restricted units (net of 500 forfeitures) and the grants issued during the three months ended December 31, 2008 of 135,305 restricted units (net of 5,840 forfeitures) had been satisfied as of January 1, 2012. As a result of this vesting, on February 14, 2012, we issued 93,938 unrestricted common units to the LTIP participants. The remaining units were settled in cash to satisfy the individual tax withholding obligations for the LTIP participants. On February 6, 2012 and April 26, 2012, the Compensation Committee authorized additional grants of up to 106,779 and 8,500 restricted units, respectively, of which 107,114 were granted during the six months ended June 30, 2012 and will vest on January 1, 2015, subject to satisfaction of certain financial tests. The fair value of these 2012 grants is equal to the intrinsic value at the date of grant, which was $77.71 per unit. LTIP expense was $1.6 million and $1.4 million for the three months ended June 30, 2012 and 2011, respectively, and $3.1 million and $2.5 million for the six months ended June 30, 2012 and 2011, respectively. After consideration of the January 1, 2012 vesting and subsequent issuance of 93,938 common units, approximately 2.2 million units remain available for issuance under the LTIP in the future, assuming all grants issued in 2010, 2011 and 2012 currently outstanding are settled with common units and no future forfeitures occur.

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As of June 30, 2012, there was $11.2 million in total unrecognized compensation expense related to the non-vested LTIP grants that are expected to vest. That expense is expected to be recognized over a weighted-average period of 1.4 years. As of June 30, 2012, the intrinsic value of the non-vested LTIP grants was $19.3 million. As of June 30, 2012, the total obligation associated with the LTIP was $8.8 million and is included in the partners’ capital-limited partners line item in our condensed consolidated balance sheets.

As provided under the distribution equivalent rights provisions of the LTIP, all non-vested grants include contingent rights to receive quarterly cash distributions in an amount equal to the cash distributions we make to unitholders during the vesting period.

SERP and Directors Deferred Compensation Plan

We utilize the SERP to provide deferred compensation benefits for certain officers and key employees. All allocations made to participants under the SERP are made in the form of “phantom” ARLP units.

Our directors participate in the Deferred Compensation Plan. Pursuant to the Deferred Compensation Plan, for amounts deferred either automatically or at the election of the director, a notional account is established and credited with notional common units of ARLP, described in the plan as “phantom” units.

For both the SERP and Deferred Compensation Plan, when quarterly cash distributions are made with respect to ARLP common units, an amount equal to such quarterly distribution is credited to each participant’s notional account as additional phantom units. All grants of phantom units under the SERP and Deferred Compensation Plan vest immediately.

Amounts that were payable under either the SERP or Deferred Compensation Plan on or prior to January 1, 2011, were paid in either cash or common units of ARLP. Effective for amounts that become payable after January 1, 2011, both the Deferred Compensation Plan and the SERP require that vested benefits be paid to participants only in common units of ARLP, and therefore the phantom units have qualified for equity award accounting treatment since that date. As a result, we reclassified a total of

$9.2 million of obligations for the SERP and the Deferred Compensation Plan from due to affiliates and other long-term liabilities to partners’ capital in our condensed consolidated balance sheets as required under FASB ASC 718, Compensation-Stock Compensation, on January 1, 2011. For the six months ended June 30, 2012 and 2011, SERP and Deferred Compensation Plan participant notional account balances were credited with a total of 4,548 and 5,898 phantom units, respectively, and the fair value of these phantom units was $64.66 and $71.96, respectively, on a weighted-average basis. Total SERP and Deferred Compensation Plan expense was approximately $0.2 million for the three months ended June 30, 2012 and 2011 and $0.4 million for the six months ended June 30, 2012 and 2011.

As of June 30, 2012, there were 153,253 total phantom units outstanding under the SERP and Deferred Compensation Plan and the total intrinsic value of the SERP and Deferred Compensation Plan phantom units was $8.6 million. As of June 30, 2012, the total obligation associated with the SERP and Deferred Compensation Plan was $10.2 million and is included in the partners’ capital-limited partners line item in our condensed consolidated balance sheets.

11. COMPONENTS OF PENSION PLAN NET PERIODIC BENEFIT COSTS

Eligible employees at certain of our mining operations participate in a defined benefit plan (the “Pension Plan”) that we sponsor. The benefit formula for the Pension Plan is a fixed dollar unit based on years of service. Components of the net periodic benefit cost for each of the periods presented are as follows (in thousands):

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We previously disclosed in our financial statements for the year ended December 31, 2011 that we expected to contribute

$5.4 million to the Pension Plan in 2012. During the six months ended June 30, 2012, we made contribution payments of $3.0 million for the 2011 plan year and $1.0 million for the 2012 plan year. On July 13, 2012, we made a payment of $1.0 million for the 2012 plan year.

On July 6, 2012, new federal legislation entitled Moving Ahead for Progress in the 21^st Century Act was passed, which includes a provision aimed at stabilizing the interest rates used to calculate pension plan liabilities for pension funding purposes. We are currently evaluating the impact of this legislation; however, we anticipate that as a result of this new legislation, we will not make any further contributions beyond the $5.0 million noted above for the 2012 plan year.

12. SEGMENT INFORMATION

We operate in the eastern U.S. as a producer and marketer of coal to major utilities and industrial users. We aggregate multiple operating segments into five reportable segments: the Illinois Basin, Central Appalachia, Northern Appalachia, White Oak and Other and Corporate. The first three reportable segments correspond to the three major coal producing regions in the eastern U.S. Similar economic characteristics for our operating segments within each of these three reportable segments include coal quality, coal seam height, mining and transportation methods and regulatory issues. The White Oak reportable segment includes our activities associated with the White Oak longwall Mine No. 1 development project more fully described below.

The Illinois Basin reportable segment is comprised of multiple operating segments, including Webster County Coal, LLC’s Dotiki mining complex, Gibson County Coal, LLC’s mining complex, which includes the Gibson North mine and Gibson South project, Hopkins County Coal, LLC’s Elk Creek mining complex, White County Coal, LLC’s Pattiki mining complex, Warrior Coal, LLC’s mining complex, River View Coal, LLC’s mining complex, Sebree Mining, LLC (“Sebree”), which includes the Onton mine and Sebree property, and certain properties of Alliance Resource Properties, LLC (“Alliance Resource Properties”), ARP Sebree, LLC and ARP Sebree South, LLC. The development of the Gibson South mine is currently underway and we are in the process of permitting the Sebree property for future mine development. For information regarding the acquisition of the Onton mine, which was added to the Illinois Basin segment in April 2012, please see Note 4.

The Central Appalachian reportable segment is comprised of two operating segments, the Pontiki Coal, LLC and MC Mining, LLC mining complexes.

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The Northern Appalachian reportable segment is comprised of multiple operating segments, including Mettiki Coal, LLC’s mining complex, Mettiki Coal (WV), LLC’s Mountain View mining complex, two small third-party mining operations (one of which ceased operations in July 2011), the Tunnel Ridge, LLC (“Tunnel Ridge”) mine and the Penn Ridge Coal, LLC (“Penn Ridge”) property. In May 2012, longwall production began at the Tunnel Ridge mine. We are in the process of permitting the Penn Ridge property for future mine development.

The White Oak reportable segment is comprised of two operating segments, WOR Properties and WOR Processing. WOR Processing includes both the surface operations at White Oak currently under construction and the equity investment in White Oak. WOR Properties owns coal reserves acquired from White Oak and is committed to acquiring additional reserves from White Oak. WOR Properties has also completed initial funding commitments to White Oak for development of these reserves. The White Oak reportable segment also includes a loan to White Oak for current financial activities related to the acquisition of mining equipment (which was paid off and terminated in June 2012) and will include future financing activities for another loan to construct certain surface facilities (Note 7).

Other and Corporate includes marketing and administrative expenses, Alliance Service, Inc. and its subsidiary, Matrix Design Group, LLC (“Matrix Design”), Alliance Design Group, LLC (“Alliance Design”) (collectively, Matrix Design and Alliance Design are referred to as the “Matrix Group”), the Mt. Vernon Transfer Terminal, LLC (“Mt. Vernon”) dock activities, coal brokerage activity, our equity investment in Mid-America Carbonates, LLC and certain activities of Alliance Resource Properties.

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Reportable segment results as of and for the three and six months ended June 30, 2012 and 2011 are presented below.