General

The following discussion of our financial condition and results of operations should be read in conjunction with the historical financial statements and notes thereto included in "Item 8. Financial Statements and Supplementary Data" where you can find more detailed information in "Note 1 - Organization and Presentation" and "Note 2 - Summary of Significant Accounting Policies" regarding the basis of presentation supporting the following financial information.

Executive Overview

We are a diversified natural resource company that generates operating and royalty income from the production and marketing of coal to major domestic and international utilities and industrial users as well as royalty income from oil & gas mineral interests located in strategic producing regions across the United States. We are currently the second-largest coal producer in the eastern United States with seven operating underground mining complexes in Illinois, Indiana, Kentucky, Maryland, Pennsylvania and West Virginia, as well as a coal-loading terminal in Indiana. In addition to our mining operations, Alliance Resource Properties owns or leases coal mineral reserves and resources in the Illinois and Appalachia Basins that are (a) leased to our internal mining complexes or (b) near other internal and external coal mining operations. The oil & gas mineral interests we own are in premier oil & gas producing regions of the United States, primarily in the Permian, Anadarko and Williston Basins.

Our mining operations are located near many of the major eastern utility generating plants and on major coal hauling railroads in the eastern United States. Our River View and Tunnel Ridge mines and Mt. Vernon transloading facility are located on the Ohio River. As of December 31, 2021, we had approximately 547.1 million tons of proven and probable coal mineral reserves and 1.17 billion tons of measured, indicated and inferred coal mineral resources in Illinois, Indiana, Kentucky, Maryland, Pennsylvania and West Virginia. All of our measured, indicated and inferred coal mineral resources and 422.9 million tons of these coal mineral reserves are owned or leased by Alliance Resource Properties, our land holding company. We believe we control adequate reserves to implement our currently contemplated mining plans. Please see "Item 1. Business-Coal Mining Operations" in our Annual Report on Form 10-K for the year ended December 31, 2021 for further discussion of our mines.

In 2021, we sold 32.3 million tons of coal and produced 32.2 million tons. Of the 32.3 million tons sold, approximately two-thirds was leased from Alliance Resource Properties. The coal we sold in 2021 was approximately 14.2% low-sulfur coal, 50.3% medium-sulfur coal and 35.5% high-sulfur coal. Based on market expectations, we classify low-sulfur coal as coal with a sulfur content of less than 1.5%, medium-sulfur coal as coal with a sulfur content of 1.5% to 3%, and high-sulfur coal as coal with a sulfur content of greater than 3%. The Btu content of our coal ranges from 11,450 to 13,200. In 2021, approximately 87.7% of our medium- and high-sulfur coal was sold to utility plants with installed pollution control devices.

During 2021, approximately 81.6% of our tons sold were purchased by U.S. electric utilities and 12.5% were sold into the international markets through brokered transactions. The balance of tons sold were to third-party resellers and industrial consumers. Although some utility customers continue to favor a shorter-term contracting strategy, in 2021 we have continued to see several domestic utilities in the market seeking significant coal supply commitments for multi-year terms. Long-term sales contracts contribute to our stability and profitability by providing greater predictability of sales volumes and sales prices. In 2021, approximately 77.9% of our sales tonnage was sold under long-term sales contracts.

On October 13, 2021, AR Midland acquired approximately 1,480 oil & gas net royalty acres in the Delaware Basin from Boulders for a purchase price of $31.0 million in the Boulders Acquisition. This acquisition enhances our ownership position in the Permian Basin and furthers our business strategy to grow our Oil & Gas Royalties segment. Following the Boulders Acquisition, we hold approximately 57,000 net royalty acres in premier oil & gas basins including our investment in AllDale III. For more information, please read "Item 8. Financial Statement and Supplemental Data-Note 3 - Acquisitions" of this Annual Report on Form 10-K.



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Our results of operations could be impacted by variability in coal sales prices in addition to prices for items that are used in coal production such as steel, electricity and other supplies, unforeseen geologic conditions or mining and processing equipment failures and unexpected maintenance problems, and by the availability or reliability of transportation for coal shipments. Moreover, the mining regulatory environment in which we operate has grown increasingly stringent as a result of federal and state legislative and regulatory initiatives. Additionally, our results of operations could be impacted by our ability to obtain and renew permits necessary for our operations, secure or acquire coal mineral reserves and resources, or find replacement buyers for coal under contracts with comparable terms to existing contracts. As outlined in "Item 1. Business-Environmental, Health, and Safety Regulations", a variety of measures taken by regulatory agencies in the United States and abroad in response to the perceived threat from climate change attributed to GHG emissions could substantially increase compliance costs for us and our customers and reduce demand for fossil fuels including coal which could materially and adversely impact our results of operations.

We are dependent on third-party operators for the exploration, development and production of our oil & gas mineral interests; therefore, the success and timing of drilling and development of our oil & gas mineral interests depend on a number of factors outside our control. Some of those factors include the operators' capital costs for drilling, development and production activities, the operators' ability to access capital, the operators' selection of counterparties for the marketing and sale of production and oil & gas prices in general, among others. The operations on the properties in which we hold oil & gas mineral interests are also subject to various governmental laws and regulations. Compliance with these laws and regulations could be burdensome or expensive for these operators and could result in the operators incurring significant liabilities, either of which could delay production and may ultimately impact the operators' ability and willingness to develop the properties in which we hold oil & gas mineral interests.

For additional information regarding some of the risks and uncertainties that affect our business and the industries in which we operate, see "Item 1A. Risk Factors".

Our principal expenses related to the production of coal are labor and benefits, equipment, materials and supplies, maintenance, royalties and excise taxes in addition to capital required to maintain our current levels of production. We employ a totally union-free workforce. Many of the benefits of our union-free workforce are related to higher productivity and are not necessarily reflected in our direct costs. In addition, transportation costs, which are mostly borne by our customers, may be substantial and are often the determining factor in a coal consumer's contracting decision. The principal expenses related to our oil & gas minerals interests business are production and ad valorem taxes. For our coal royalty interests business, the principal expenses are royalty expenses and production and ad valorem taxes.

Our primary business strategy is to create sustainable, capital-efficient growth in available cash to maximize unitholder returns by:

? expanding our operations by adding and developing mines and coal mineral

reserves and resources in existing, adjacent or neighboring properties;

extending the lives of our current mining operations through acquisition and

? development of coal mineral reserves and resources using our existing

infrastructure;

? continuing to make productivity improvements to remain a low-cost producer in

each region in which we operate;

strengthening our position with existing and future customers by offering a

? broad range of coal qualities, transportation alternatives and customized

services;

developing strategic relationships to take advantage of opportunities within

? the coal and oil & gas industries and in other industries inside and outside of

the MLP sector; and

continuing to make investments in oil & gas mineral interests and coal royalty

? interests in various geographic locations within producing basins in the

continental United States.

As of December 31, 2021, we had four reportable segments: Illinois Basin Coal Operations, Appalachia Coal Operations, Oil & Gas Royalties and Coal Royalties.

We also have an "all other" category referred to as Other, Corporate and Elimination. The two Coal Operations reportable segments correspond to major coal producing regions in the eastern United States with similar economic characteristics including coal quality, geology, coal marketing opportunities, mining and transportation methods and regulatory issues. The Oil & Gas Royalties reportable segment includes our oil & gas mineral interests which are located primarily in the Permian (Delaware and Midland), Anadarko (SCOOP/STACK), and Williston (Bakken) basins. Our ownership in these basins includes approximately 57,000 net royalty acres, which provide us with diversified exposure to industry leading operators consistent with our general strategy to grow our oil & gas mineral interest business. We market our oil & gas mineral interests for lease to operators in those regions and generate royalty



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income from the leasing and development of those mineral interests. Our Coal Royalties reportable segment includes coal mineral reserves and resources owned or leased by Alliance Resource Properties, which are either a) leased to our mining complexes or (b) near our coal mining operations but not yet leased.

Beginning in the first quarter of 2021, we began to strategically view and manage our coal royalty activities separately from our coal operations since acquiring and managing a variety of royalty producing assets involve similar attributes. As a result, we restructured our reportable segments to better reflect this strategic view in how we manage our business and allocate resources. Periods prior to 2021 that are presented herein have been recast to include Alliance Resource Properties within our new Coal Royalties reportable segment with offsetting recast adjustments primarily to our coal operations reportable segments and to a lesser extent, our Other, Corporate and Elimination category. Eliminations reported in Other, Corporate and Elimination were also recast to reflect intercompany royalty revenues and offsetting intercompany royalty expense resulting from our new Coal Royalties reportable segment.

Illinois Basin Coal Operations reportable segment includes currently operating

mining complexes (a) the Gibson County Coal mining complex, which includes the

? Gibson South mine, (b) the Warrior mining complex, (c) the River View mining

complex and (d) the Hamilton mining complex. The Illinois Basin Coal Operations

reportable segment also includes our Mt. Vernon coal-loading terminal in

Indiana which currently operates on the Ohio River.

The Illinois Basin Coal Operations reportable segment also includes Mid-America Carbonates, LLC ("MAC") and other support services as well as non-operating mining complexes (a) Gibson North mine, which ceased production in the fourth quarter of 2019, (b) Webster County Coal's Dotiki mining complex, which ceased production in August 2019, (c) White County Coal, LLC's Pattiki mining complex, which ceased production in December 2016, (d) the Hopkins County Coal, LLC mining complex, which ceased production in April 2016, and (e) the Sebree mining complex, which ceased production in November 2015. The non-operating mining complexes are in various stages of reclamation.

Appalachia Coal Operations reportable segment includes currently operating

mining complexes (a) the Mettiki mining complex, (b) the Tunnel Ridge mining

? complex and (c) the MC Mining mining complex. The Mettiki mining complex

includes Mettiki Coal (WV)'s Mountain View mine and Mettiki Coal (MD)'s

preparation plant.

Oil & Gas Royalties reportable segment includes oil & gas mineral interests

held by AR Midland and AllDale I & II and includes Alliance Minerals' equity

interests in both AllDale III and Cavalier Minerals. AR Midland acquired its

? mineral interests in the Wing Acquisition and Boulders Acquisition. Please read

"Item 8. Financial Statements and Supplementary Data-Note 3 - Acquisitions" and

"-Note 13 - Investments" of this Annual Report on Form 10-K for more

information on the Wing Acquisition and Boulders Acquisition, and AllDale III,

respectively.

Coal Royalties reportable segment includes coal mineral reserves and resources

owned or leased by Alliance Resource Properties that are (a) leased to certain

of our mining complexes in both the Illinois Basin Coal Operations and

? Appalachia Coal Operations reportable segments or (b) located near our

operations and external mining operations. Approximately two thirds of the

coal sold by our Coal Operations' mines is leased from our Coal Royalties

entities.

Other, Corporate and Elimination includes marketing and administrative

activities, the Matrix Group, Pontiki Coal, LLC's workers' compensation and

pneumoconiosis liabilities, Wildcat Insurance, which assists the ARLP

? Partnership with its insurance requirements, AROP Funding, LLC ("AROP Funding")

and Alliance Resource Finance Corporation ("Alliance Finance"). Please read

"Item 8. Financial Statements and Supplementary Data-Note 8 - Long-term Debt"

of this Annual Report on Form 10-K for more information on AROP Funding and

Alliance Finance.

How We Evaluate Our Performance

Our management uses a variety of financial and operational measurements to analyze our performance. Primary measurements include the following: (1) raw and saleable tons produced per unit shift; (2) coal sales price per ton; (3) BOE sold; (4) price per BOE; (5) coal royalty tons sold; (6) coal royalty revenue per ton; (7) Segment Adjusted EBITDA Expense per ton; (8) EBITDA; and (9) Segment Adjusted EBITDA.



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Raw and Saleable Tons Produced per Unit Shift. We review raw and saleable tons produced per unit shift as part of our operational analysis to measure the productivity of our operating segments, which is significantly influenced by mining conditions and the efficiency of our preparation plants. Our discussion of mining conditions and preparation plant costs are found below under "-Analysis of Historical Results of Operations" and therefore provides implicit analysis of raw and saleable tons produced per unit shift.

Coal Sales Price per Ton. We define coal sales price per ton as total coal sales divided by tons sold. We review coal sales price per ton to evaluate marketing efforts and for market demand and trend analysis.

Oil & gas BOE sold. We monitor and analyze our BOE sales volumes from the various basins that comprise our portfolio of mineral interests. We also regularly compare projected volumes to actual volumes reported and investigate unexpected variances.

Price per BOE. We define price per BOE as total oil & gas royalties divided by BOE produced. We review price per BOE to evaluate performance against budget and for trend analysis.

Coal Royalty Tons sold. We monitor and analyze our coal royalty sales volumes from our various mining subsidiaries for coal leased by Alliance Resource Properties for consistency with our Coal Operations segments and for trend analysis.

Coal Royalty Revenue per Ton. We define coal royalty revenue per ton as total coal royalties divided by royalty tons sold. We review coal royalty revenue per ton to evaluate consistency with our Coal Operations segments and for trend analysis.

Segment Adjusted EBITDA Expense per Ton. We define Segment Adjusted EBITDA Expense per ton (a non-GAAP financial measure) as the sum of operating expenses, coal purchases and other expense divided by total tons sold. We review Segment Adjusted EBITDA Expense per ton for cost trends.

EBITDA. We define EBITDA (a non-GAAP financial measure) as net income attributable to ARLP before net interest expense, income taxes and depreciation, depletion and amortization. EBITDA is used as a supplemental financial measure by our management and by external users of our financial statements such as investors, commercial banks, research analysts and others. We believe that the presentation of EBITDA provides useful information to investors regarding our performance and results of operations because EBITDA, when used in conjunction with related GAAP financial measures, (i) provides additional information about our core operating performance and ability to generate and distribute cash flow, (ii) provides investors with the financial analytical framework upon which we base financial, operational, compensation and planning decisions and (iii) presents a measurement that investors, rating agencies and debt holders have indicated is useful in assessing us and our results of operations.

Segment Adjusted EBITDA. We define Segment Adjusted EBITDA (a non-GAAP financial measure) as net income attributable to ARLP before net interest expense, income taxes, depreciation, depletion and amortization, general and administrative expense, settlement gain, asset and goodwill impairments and acquisition gain. Management therefore is able to focus solely on the evaluation of segment operating profitability as it relates to our revenues and operating expenses, which are primarily controlled by our segments.

Analysis of Historical Results of Operations

2021 Compared with 2020

Total revenues increased 18.2% to $1.57 billion, compared to $1.33 billion for 2020 primarily due to increased coal sale volumes and oil & gas prices, which increased 14.4% and 88.2%, respectively. Higher revenues, lower depreciation and $157.0 million of non-cash impairment charges in 2020, partially offset by higher Segment Adjusted EBITDA Expense, resulted in net income attributable to ARLP of $178.2 million for 2021 compared to a net loss attributable to ARLP of $129.2 million for 2020. In general, results from coal operations and oil & gas royalties for 2021 were significantly improved compared to 2020, which was impacted by reduced global energy demand and weak commodity prices as a result of lockdown measures imposed in response to the COVID-19 pandemic.



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                                     Year Ended December 31,          Year Ended December 31,
                                       2021            2020            2021              2020

                                          (in thousands)                 (per ton/BOE sold)
Coal - Tons sold                          32,268         28,212             N/A               N/A
Coal - Tons produced                      32,207         26,990             N/A               N/A
Coal - Coal sales                  $   1,386,923    $ 1,232,272    $      42.98      $      43.68
Coal - Segment Adjusted EBITDA
Expense (1) (2)                    $     975,839    $   881,006    $      30.24      $      31.23
Oil & Gas Royalties - BOE sold             1,663          1,792             N/A               N/A
Oil & Gas Royalties - Royalties
(3)                                $      74,988    $    42,912    $      45.08      $      23.95
Coal Royalties - Tons sold                20,247         18,863             N/A               N/A
Coal Royalties - Intercompany
royalties                          $      51,402    $    42,112    $       2.54      $       2.23

For a definition of Segment Adjusted EBITDA Expense and related (1) reconciliation to its comparable GAAP financial measure, please see below


    under "-Reconciliation of non-GAAP 'Segment Adjusted EBITDA Expense' to GAAP
    'Operating Expenses.'"

Coal - Segment Adjusted EBITDA Expense is defined as consolidated Segment (2) Adjusted EBITDA Expense excluding expenses of our Oil & Gas Royalties segment

and is adjusted for intercompany transactions with our Coal Royalties

segment.

(3) Average sales price per BOE is defined as oil & gas royalty revenues

excluding lease bonus revenue divided by total BOE sold.

Coal sales. Coal sales increased $154.7 million or 12.6% to $1.39 billion for 2021 from $1.23 billion for 2020. The increase was attributable to a volume variance of $177.2 million resulting from increased tons sold partially offset by a negative price variance of $22.5 million due to lower average coal sales prices. Tons sold increased 14.4% to 32.3 million tons in 2021 due to improved coal demand and increased export shipments. Primarily due to the expiration of higher priced contract shipments, coal sales price realizations declined 1.6% in 2021 to $42.98 per ton sold, compared to $43.68 per ton sold during 2020.

Production volumes increased by 19.3% in 2021, reflecting the temporary idling and scaling back of production at certain mines during 2020 in response to weak market conditions resulting from the pandemic.

Coal - Segment Adjusted EBITDA Expense. Segment Adjusted EBITDA Expense for our coal operations increased 10.8% to $975.8 million, as a result of higher coal sales volumes. On a per ton basis, Segment Adjusted EBITDA Expense for our coal operations decreased 3.2% in 2021 to $30.24 per ton sold, compared to $31.23 per ton in 2020, primarily due to increased volumes lowering fixed costs per ton, a favorable sales mix from our lower cost mines and the impact of ongoing expense control and efficiency initiatives at all of our mining operations in addition to other cost decreases which are discussed below by category:

Labor and benefit expenses per ton produced, excluding workers' compensation,

decreased 11.3% to $9.53 per ton in 2021 from $10.75 per ton in 2020. The

? decrease of $1.22 per ton was primarily due to increased volumes at our

Illinois Basin mines where production was temporarily idled in 2020 in response

to weak market conditions resulting from the pandemic.

Workers' compensation expenses per ton produced decreased to $0.38 per ton in

2021 from $0.59 per ton in 2020. The decrease of $0.21 per ton produced

? resulted from increased production and refunds received in 2021 on assessments

paid to the state of Kentucky in prior years, partially offset by unfavorable

workers' compensation accrual adjustments in 2021 primarily due to unfavorable

changes in claims development.

Maintenance expenses per ton produced decreased 11.2% to $2.77 per ton in 2021

? from $3.12 per ton in 2020. The decrease of $0.35 per ton produced was

primarily due to increased production volumes.

Segment Adjusted EBITDA Expense decreases above were partially offset by the following increase:

Material and supplies expenses per ton produced increased 4.9% to $10.50 per

ton in 2021 from $10.01 per ton in 2020. The increase of $0.49 per ton

produced primarily reflects increases of $0.79 per ton for roof support, $0.21

? per ton for contract labor used in the mining process and $0.17 per ton in

longwall subsidence expense primarily at our Tunnel Ridge operation, partially

offset by decreases of $0.30 per ton for outside expenses used in the mining

processes and $0.14 per ton for environmental and reclamation expenses other


   than longwall subsidence.


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Oil & gas royalties. Oil & gas royalty revenues increased to $75.0 million in 2021 compared to $42.9 million for 2020. The increase of $32.1 million was primarily due to significantly higher sales price realizations per BOE.

General and administrative. General and administrative expenses for 2021 increased to $70.2 million compared to $59.8 million in 2020. The increase of $10.4 million was primarily due to higher incentive compensation expenses.

Depreciation, depletion and amortization. Depreciation, depletion and amortization expense decreased to $261.4 million for 2021 compared to $313.4 million for 2020 primarily as a result of increased mine life estimates for certain mines and reduced depreciation associated with a) coal inventory changes, b) certain mines closed prior to 2021 and c) lower BOE volumes.

Asset impairments. During 2020, we recorded $25.0 million of non-cash asset impairment charges due to sealing our idled Gibson North mine, resulting in its permanent closure, and a decrease in the fair value of certain mining equipment and greenfield coal mineral reserves and resources as a result of weakened coal market conditions. Please read "Item 8. Financial Statements and Supplementary Data-Note 4 - Long-Lived Asset Impairments."

Goodwill impairment. During 2020, we recorded a $132.0 million non-cash goodwill impairment charge associated with our Hamilton mine, primarily as the result of reduced expected production volumes due to weakened coal market conditions and low energy demand resulting in part from the COVID-19 pandemic.

Please read "Item 8. Financial Statements and Supplementary Data- Note 5 - Goodwill Impairment."

Transportation revenues and expenses. Transportation revenues and expenses were $69.6 million and $21.1 million for 2021 and 2020, respectively. The increase of $48.5 million was primarily attributable to increased average third-party transportation rates in 2021 and increased coal shipments to international markets for which we arrange third-party transportation. Transportation revenues are recognized when title to the coal passes to the customer and recognized in an amount equal to the corresponding transportation expenses.



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Segment Information. Our 2021 Segment Adjusted EBITDA increased $102.8 million, or 23.0%, to $549.3 million from 2020 Segment Adjusted EBITDA of $446.5 million.

Segment Adjusted EBITDA, tons sold, coal sales, other revenues, Segment Adjusted EBITDA Expense, oil & gas royalties, BOE volume, coal royalties and coal royalties tons sold by segment are as follows:



                                             Year Ended December 31,
                                               2021              2020         Increase (Decrease)

                                                         (in thousands)
Segment Adjusted EBITDA
Illinois Basin Coal Operations            $      265,292      $   213,876   $    51,416       24.0 %
Appalachia Coal Operations                       172,601          171,362         1,239        0.7 %
Oil & Gas Royalties                               68,774           39,773        29,001       72.9 %
Coal Royalties                                    33,202           23,968         9,234       38.5 %
Other, Corporate and Elimination (2)               9,383          (2,490)        11,873        (1)

Total Segment Adjusted EBITDA (3) $ 549,252 $ 446,489 $ 102,763 23.0 %



Coal - Tons sold
Illinois Basin Coal Operations                    22,264           19,113         3,151       16.5 %
Appalachia Coal Operations                        10,004            9,099           905        9.9 %
Total tons sold                                   32,268           28,212         4,056       14.4 %

Coal sales
Illinois Basin Coal Operations            $      873,930      $   755,208   $   118,722       15.7 %
Appalachia Coal Operations                       512,993          477,064        35,929        7.5 %
Total coal sales                          $    1,386,923      $ 1,232,272   $   154,651       12.6 %

Other revenues
Illinois Basin Coal Operations            $        4,666      $     1,932   $     2,734      141.5 %
Appalachia Coal Operations                         3,940           14,954      (11,014)     (73.7) %
Oil & Gas Royalties                                2,197              229         1,968        (1)
Coal Royalties                                        69              105          (36)     (34.3) %
Other, Corporate and Elimination                  27,586           14,596        12,990       89.0 %
Total other revenues                      $       38,458      $    31,816   $     6,642       20.9 %

Segment Adjusted EBITDA Expense
Illinois Basin Coal Operations            $      613,303      $   543,264   $    70,039       12.9 %
Appalachia Coal Operations                       344,332          320,656        23,676        7.4 %
Oil & Gas Royalties                                9,943            4,106         5,837      142.2 %
Coal Royalties                                    18,269           18,249            20        0.1 %
Other, Corporate and Elimination (2)            (33,198)         (25,026)       (8,172)     (32.7) %

Total Segment Adjusted EBITDA Expense $ 952,649 $ 861,249 $ 91,400 10.6 %



Oil & Gas Royalties
Volume - BOE (4)                                   1,663            1,792         (129)      (7.2) %
Oil & gas royalties                       $       74,988      $    42,912   $    32,076       74.7 %

Coal Royalties
Volume - Tons sold (5)                    $       20,247           18,863   $     1,384        7.3 %
Intercompany coal royalties                       51,402      $    42,112         9,290       22.1 %

(1) Percentage change not meaningful.

Other, Corporate and Elimination includes the elimination of intercompany (2) coal royalty revenues and expenses between our Coal Royalties Segment and our


    Coal Operations Segments in addition to the expenses for the other
    miscellaneous activities included in this category.

For a definition of Segment Adjusted EBITDA and related reconciliation to (3) comparable GAAP financial measures, please see below under "-Reconciliation

of non-GAAP "Segment Adjusted EBITDA" to GAAP "net income (loss)."

(4) BOE for natural gas is calculated on a 6:1 basis (6,000 cubic feet of natural


    gas to one barrel).


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(5) Represents tons sold by our Coal Operations Segments associated with coal

mineral reserves leased from our Coal Royalties Segment.

Illinois Basin Coal Operations - Segment Adjusted EBITDA increased 24.0% to $265.3 million in 2021 from $213.9 million in 2020. The increase of $51.4 million was primarily attributable to higher coal sales, which increased 15.7% to $873.9 million in 2021 from $755.2 million in 2020. The increase of $118.7 million in coal sales primarily reflects increased sales volumes, which rose 16.5% compared to 2020 due to improved coal demand and increased export volumes reflecting the continued economic recovery from the COVID-19 pandemic.

Increased expenses resulting from higher coal sales volumes, partially offset by ongoing cost control and efficiency initiatives, contributed to higher Segment Adjusted EBITDA Expense of $613.3 million in 2021 compared to $543.3 million in 2020. Segment Adjusted EBITDA Expense per ton decreased 3.1% to $27.55 from $28.42 per ton sold in 2020 primarily as a result of increased volumes where production was temporarily idled and scaled back in 2020 in response to weak market conditions resulting from the pandemic. A favorable sales mix from our lower cost mines in 2021 and the impact of ongoing expense control and efficiency initiatives at all of our mining operations in the region also contributed to the decrease. In addition, also see certain cost variances described above under "-Coal - Segment Adjusted EBITDA Expense."

Appalachia Coal Operations - Segment Adjusted EBITDA increased to $172.6 million for 2021 from $171.4 million in 2020. The increase of $1.2 million was primarily attributable to higher coal sales, partially offset by lower contract buy-out revenues during 2021. Coal sales increased 7.5% to $513.0 million in 2021 compared to $477.1 million in 2020 as a result of increased sales volumes, partially offset by lower price realizations. Tons sold increased 9.9% in 2021 compared to 2020 due to increased sales volumes at our Tunnel Ridge and MC Mining operations resulting from improved market conditions. Coal sales price per ton sold in 2021 decreased 2.2% compared to 2020 primarily due to the expiration of higher priced contract shipments. Segment Adjusted EBITDA Expense increased 7.4% in 2021 compared to 2020 due to increased coal sales volumes, partially offset by decreased per ton costs. Segment Adjusted EBITDA Expense per ton decreased 2.3% to $34.42 compared to $35.24 per ton sold in 2020, as a result of increased sales volumes lowering fixed costs per ton, the full-year production benefit from MC Mining's transition of mining operations to a new reserve area in the second half of 2020, ongoing expense control and efficiency initiatives and improved recoveries across the region. See also certain cost variances described above under "-Coal - Segment Adjusted EBITDA Expense."

Oil & Gas Royalties - Segment Adjusted EBITDA increased 72.9% to $68.8 million for 2021 from $39.8 million in 2020. The increase of $29.0 million was primarily due to significantly higher sales price realizations per BOE, which more than offset lower volumes.

Coal Royalties - Segment Adjusted EBITDA increased 38.5% to $33.2 million for 2021 from $24.0 million in 2020. The increase of $9.2 million was a result of increased royalty tons sold and higher average coal royalty revenue per ton received from our mining subsidiaries.

Other, Corporate and Elimination - Segment Adjusted EBITDA increased by $11.9 million in 2021 due primarily to increased mining technology product sales from the Matrix Group.

2020 Compared with 2019

Total revenues decreased 32.3% to $1.33 billion for 2020 compared to $1.96 billion for 2019 primarily due to lower coal sales and transportation revenues resulting from weak market conditions and disruptions caused by the COVID-19 pandemic. These lower revenues and a non-cash goodwill impairment charge of $132.0 million partially offset by lower operating expenses, resulted in a net loss attributable to ARLP of $129.2 million for 2020 compared to net income attributable to ARLP of $399.4 million for 2019, which included a net gain of $170.0 million related to the AllDale Acquisition in 2019. Operating expenses and transportation expenses totaled $859.7 million and $21.1 million, respectively, for 2020 compared to $1.18 billion and $99.5 million, respectively, in 2019.



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                                      Year Ended December 31,          Year Ended December 31,
                                        2020            2019            2020              2019

                                           (in thousands)                   (per ton sold)
Coal - Tons sold                           28,212         39,289             N/A               N/A
Coal - Tons produced                       26,990         39,981             N/A               N/A
Coal - Coal sales                   $   1,232,272    $ 1,762,442    $      43.68      $      44.86
Coal - Segment Adjusted EBITDA
Expense (1) (2)                     $     881,006    $ 1,233,377    $      31.23      $      31.39
Oil & Gas Royalties - BOE sold              1,792          1,611             N/A               N/A
Oil & Gas Royalties - Royalties
(3)                                        42,912    $    51,735    $      23.95      $      32.12
Coal Royalties - Tons sold                 18,863         23,002             N/A               N/A
Coal Royalties - Intercompany
royalties                                  42,112    $    57,737    $       2.23      $       2.51

For a definition of Segment Adjusted EBITDA Expense and related (1) reconciliation to its comparable GAAP financial measure, please see below


    under "-Reconciliation of non-GAAP 'Segment Adjusted EBITDA Expense' to GAAP
    'Operating Expenses.'"

Coal - Segment Adjusted EBITDA Expense is defined as consolidated Segment (2) Adjusted EBITDA Expense excluding expenses of our Oil & Gas Royalties segment

and is adjusted for intercompany transactions with our Coal Royalties

segment.

(3) Average sales price per BOE is defined as oil & gas royalty revenues

excluding lease bonus revenue divided by total BOE sold.

Coal sales. Coal sales decreased $530.2 million or 30.1% to $1.23 billion for 2020 from $1.76 billion for 2019. The decrease was attributable to a volume variance of $496.9 million resulting from decreased tons sold and a price variance of $33.3 million due to lower average coal sales prices. Tons sold declined 28.2% to 28.2 million tons in 2020, due to reduced shipments to domestic utilities and international markets. Coal sales price realizations declined 2.6% in 2020 to $43.68 per ton sold, compared to $44.86 per ton sold during 2019 resulting, in part, from the absence of high priced metallurgic coal volumes in the 2020 Year. Coal production volumes fell to 27.0 million tons, a reduction of 32.5% compared to 2019, due to temporarily idling production at certain mines particularly in the Illinois Basin Coal Operations region, in response to weak market conditions during 2020.

Coal - Segment Adjusted EBITDA Expense. Segment Adjusted EBITDA Expense for our coal operations decreased 28.6% to $881.0 million in 2020, primarily as a result of reduced tons sold. Segment Adjusted EBITDA Expense per ton decreased slightly in 2020 to $31.23 per ton, compared to $31.39 per ton in 2019. The decrease is attributed primarily to expense control initiatives at all operations, partially offset by the per ton cost impact of lower coal volumes resulting from production curtailment in response to market conditions.

Significant cost control initiatives included the closure of higher cost per ton production at our Dotiki and Gibson North mines. Cost per ton in 2020 also benefited from improved recoveries at several mines in both regions offset in part by reduced unit shifts from the curtailment. Our costs per ton were impacted by the following cost variances as discussed by category:

Material and supplies expenses per ton produced decreased 8.6% to $10.01 per

ton in 2020 from $10.95 per ton in 2019. The decrease of $0.94 per ton

produced resulted primarily from production mix benefits and improved

? recoveries previously mentioned, related decreases of $0.46 per ton for roof

support, $0.32 per ton for contract labor used in the mining process and $0.14

per ton for certain ventilation expenses, partially offset by an increase of

$0.15 per ton for power and fuel used in the mining process.

Maintenance expenses per ton produced decreased 13.1% to $3.12 per ton in 2020

? from $3.59 per ton in 2019. The decrease of $0.47 per ton produced was

primarily due to reduced maintenance requirements as a result of production mix

benefits and improved recoveries previously mentioned.

We had no sales of outside coal purchases in 2020 compared to $23.4 million in

? 2019. Thus, costs per ton in 2020 benefited as our cost of outside coal

purchases are generally higher on a per ton basis than our produced coal.




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Segment Adjusted EBITDA Expense decreases above were partially offset by the following increases:

Labor and benefit expenses per ton produced, excluding workers' compensation,

increased 8.7% to $10.75 per ton in 2020 from $9.89 per ton in 2019. The

? increase of $0.86 per ton was primarily due to curtailed production, partially

offset by an improved production mix and improved recoveries at certain mines

all previously discussed.

Production taxes and royalty expenses per ton incurred as a percentage of coal

sales prices and volumes increased $0.53 per produced ton sold in 2020 compared

to 2019 primarily as a result of a $0.60 per ton government-imposed increase in

? the federal black lung excise tax, effective January 1, 2020 and an unfavorable

state production mix increasing severance taxes per ton, in addition to

increased excise taxes per ton resulting from a greater mix of domestic vs.

export shipments in 2020 compared to 2019.

Oil & gas royalties. Oil & gas royalty revenues decreased to $42.9 million in 2020 compared to $51.7 million for 2019. The decrease was primarily due to lower average product prices, partially offset by higher volumes resulting from the Wing Acquisition in August 2019 and continued drilling and development of our mineral interests.

Other revenues. Other revenues were principally comprised of Mt. Vernon transloading revenues in our Illinois Basin Coal Operations segment, oil & gas lease bonuses in our Oil & Gas Royalties segment and Matrix Design sales in Other, Corporate and Elimination. Other revenues also include contract buy-out revenues and other outside services which could occur in any of our segments.

Other revenues decreased to $31.8 million in 2020 from $48.0 million in 2019.

The decrease of $16.2 million was primarily due to reduced sales of mining technology products by our Matrix Design subsidiary and lower coal volumes shipped through our Mt. Vernon transloading facility.

General and administrative. General and administrative expenses for 2020 decreased to $59.8 million compared to $73.0 million in 2019. The decrease of $13.2 million was primarily due to incentive compensation reductions and our expense reduction initiatives.

Asset impairments. During 2020, we recorded $25.0 million of non-cash asset impairment charges due to sealing our idled Gibson North mine, resulting in its permanent closure, and a decrease in the fair value of certain mining equipment and greenfield coal mineral reserves and resources as a result of weakened coal market conditions. During 2019, we recorded an asset impairment charge of $15.2 million due to the cessation of production at our Dotiki mine. Please read "Item 8. Financial Statements and Supplementary Data-Note 4 - Long-Lived Asset Impairments" of this Annual Report on Form 10-K."

Goodwill impairment. During 2020, we recorded a $132.0 million non-cash goodwill impairment charge associated with our Hamilton mine, primarily as the result of reduced expected production volumes due to weakened coal market conditions and low energy demand resulting in part from the COVID-19 pandemic.

Please read "Item 8. Financial Statements and Supplementary Data- Note 5 - Goodwill Impairment " of this Annual Report on Form 10-K.

Equity securities income. Equity securities income decreased $12.9 million compared to 2019 as we did not recognize equity securities income in 2020 due to the redemption of our preferred interest in Kodiak Gas Service, LLC ("Kodiak") in 2019.

Acquisition gain. We recorded a non-cash acquisition gain of $177.0 million in 2019 associated with the AllDale Acquisition to reflect the fair value of the interests in AllDale I & II we already owned at the time of the acquisition.

Transportation revenues and expenses. Transportation revenues and expenses were $21.1 million and $99.5 million for 2020 and 2019, respectively. The decrease of $78.4 million was largely attributable to decreased coal tonnage for which we arrange third-party transportation at certain mines primarily reflecting reduced coal shipments to international markets and a decrease in average third-party transportation rates in 2020. Transportation revenues are recognized in an amount equal to transportation expenses when title to the coal passes to the customer.

Net income attributable to noncontrolling interest. Net income attributable to noncontrolling interest decreased to $0.2 million in 2020 from $7.5 million in 2019 as a result of allocating $7.1 million of the acquisition gain discussed above to noncontrolling interest in 2019.



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Segment Information. Our 2020 Segment Adjusted EBITDA decreased $225.5 million, or 33.6%, to $446.5 million from 2019 Segment Adjusted EBITDA of $672.0 million.

Segment Adjusted EBITDA, tons sold, coal sales, other revenues, Segment Adjusted EBITDA Expense, oil & gas royalties, BOE volume, coal royalties and coal royalties tons sold by segment are as follows:



                                             Year Ended December 31,
                                               2020              2019         Increase (Decrease)

                                                         (in thousands)
Segment Adjusted EBITDA
Illinois Basin Coal Operations            $      213,876      $   349,810   $ (135,934)     (38.9) %
Appalachia Coal Operations                       171,362          215,187      (43,825)     (20.4) %
Oil & Gas Royalties                               39,773           46,997       (7,224)     (15.4) %
Coal Royalties                                    23,968           36,315      (12,347)     (34.0) %
Other, Corporate and Elimination (2)             (2,490)           23,692      (26,182)    (110.5) %

Total Segment Adjusted EBITDA (3) $ 446,489 $ 672,001 $ (225,512) (33.6) %



Coal - Tons sold
Illinois Basin Coal Operations                    19,113           28,480       (9,367)     (32.9) %
Appalachia Coal Operations                         9,099           10,809       (1,710)     (15.8) %
Total tons sold                                   28,212           39,289      (11,077)     (28.2) %

Coal sales
Illinois Basin Coal Operations            $      755,208      $ 1,128,588   $ (373,380)     (33.1) %
Appalachia Coal Operations                       477,064          628,406     (151,342)     (24.1) %
Other, Corporate and Elimination                       -            5,448       (5,448)    (100.0) %
Total coal sales                          $    1,232,272      $ 1,762,442   $ (530,170)     (30.1) %

Other revenues
Illinois Basin Coal Operations            $        1,932      $    13,017   $  (11,085)     (85.2) %
Appalachia Coal Operations                        14,954           11,166         3,788       33.9 %
Oil & Gas Royalties                                  229            1,301       (1,072)     (82.4) %
Coal Royalties                                       105               23            82        (1)
Other, Corporate and Elimination                  14,596           22,533       (7,937)     (35.2) %
Total other revenues                      $       31,816      $    48,040   $  (16,224)     (33.8) %

Segment Adjusted EBITDA Expense
Illinois Basin Coal Operations            $      543,264      $   791,795   $ (248,531)     (31.4) %
Appalachia Coal Operations                       320,656          424,387     (103,731)     (24.4) %
Oil & Gas Royalties                                4,106            7,811       (3,705)     (47.4) %
Coal Royalties                                    18,249           21,445       (3,196)     (14.9) %
Other, Corporate and Elimination (2)            (25,026)         (40,542)        15,516       38.3 %

Total Segment Adjusted EBITDA Expense $ 861,249 $ 1,204,896 $ (343,647) (28.5) %



Oil & Gas Royalties
Volume - BOE (4)                                   1,792            1,611           181       11.2 %
Oil & gas royalties                       $       42,912      $    51,735   $   (8,823)     (17.1) %

Coal Royalties
Volume - Tons sold (5)                            18,863           23,002       (4,139)     (18.0) %
Intercompany coal royalties               $       42,112      $    57,737   $  (15,625)     (27.1) %

(1) Percentage change not meaningful.

Other, Corporate and Elimination includes the elimination of intercompany (2) coal royalty revenues and expenses between our Coal Royalties Segment and our


    Coal Operations Segments in addition to the expenses for the other
    miscellaneous activities included in this category.


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For a definition of Segment Adjusted EBITDA and related reconciliation to (3) comparable GAAP financial measures, please see below under "-Reconciliation

of non-GAAP "Segment Adjusted EBITDA" to GAAP "net income (loss)."

(4) BOE for natural gas is calculated on a 6:1 basis (6,000 cubic feet of natural

gas to one barrel).

(5) Represents tons sold by our Coal Operations Segments associated with coal

mineral reserves leased from our Coal Royalties Segment.

Illinois Basin Coal Operations - Segment Adjusted EBITDA decreased 38.9% to $213.9 million in 2020 from $349.8 million in 2019. The decrease of $135.9 million was primarily attributable to lower coal sales, which decreased 33.1% to $755.2 million in 2020 from $1.13 billion in 2019, partially offset by reduced operating expenses. The decrease of $373.4 million in coal sales primarily reflects reduced tons sold, which decreased 32.9% compared to 2019 due to curtailed production across all of our mining operations in the region as a result of weak coal market conditions, particularly international markets, amid the COVID-19 pandemic. Segment Adjusted EBITDA Expense decreased 31.4% to $543.3 million in 2020 from $791.8 million in 2019 primarily as a result of reduced tons sold. Segment Adjusted EBITDA Expense per ton increased $0.62 per ton sold to $28.42 from $27.80 per ton sold in 2019, primarily due to reduced coal volumes and related increased fixed costs per ton offset in part by the closure of higher cost per ton operations, improved recoveries at certain mines in 2020 and reduced reclamation accruals at certain non-operating mines. In addition, see certain cost per ton and production variances described above under "-Coal - Segment Adjusted EBITDA Expense."

Appalachia Coal Operations - Segment Adjusted EBITDA decreased 20.4% to $171.4 million for 2020 from $215.2 million in 2019. The decrease of $43.8 million was primarily attributable to lower coal sales, which decreased 24.1% to $477.1 million in 2020 from $628.4 million in 2019, partially offset by reduced operating expenses. The decrease of $151.3 million in coal sales reflects lower tons sold and price realizations. Sales volumes decreased 15.8% in 2020 compared to 2019 due to curtailed production in the region as a result of weak coal market conditions, particularly international markets, amid the COVID-19 pandemic. Coal sales price per ton sold in 2020 decreased 9.8% compared to 2019 primarily due to reduced metallurgical tons sold and price realizations at our Mettiki mine. Segment Adjusted EBITDA Expense decreased 24.4% to $320.7 million in 2020 from $424.4 million in 2019 due to reduced tons sold and decreased per ton costs. Segment Adjusted EBITDA Expense per ton decreased $4.02 per ton sold to $35.24 compared to $39.26 per ton sold in 2019. The lower per ton expense in 2020 resulted primarily from fewer longwall move days and improved recoveries at both our Tunnel Ridge and Mettiki mines, reduced roof support expenses per ton and the absence of higher cost purchased tons sold in 2020, partially offset by curtailed production in the region during 2020 increasing fixed costs per ton. See also certain cost variances described above under "-Coal - Segment Adjusted EBITDA Expense."

Oil & Gas Royalties - Segment Adjusted EBITDA decreased to $39.8 million for 2020 from $47.0 million in 2019 reflecting reduced average sales price per BOE due to reduced demand amid the COVID-19 pandemic, partially offset by increased production volumes from the additional mineral interests acquired in the Wing Acquisition in August 2019 and from continued drilling and development activities.

Coal Royalties - Segment Adjusted EBITDA decreased 34.0% to $24.0 million for 2020 from $36.3 million in 2019. The decrease of $12.3 million was a result of reduced royalty tons sold and lower average coal royalty revenue per ton received from our mining subsidiaries.

Other, Corporate and Elimination - Segment Adjusted EBITDA decreased by $26.2 million in 2020 compared to 2019 due primarily to lower equity securities income as a result of the redemption of our preferred interest in Kodiak in 2019, decreased coal brokerage activity and lower mining technology product sales from the Matrix Group.

Reconciliation of non-GAAP "Segment Adjusted EBITDA" to GAAP "net income (loss)" and reconciliation of non-GAAP "Segment Adjusted EBITDA Expense" to GAAP "Operating Expenses"

Segment Adjusted EBITDA (a non-GAAP financial measure) is defined as net income (loss) attributable to ARLP before net interest expense, income taxes, depreciation, depletion and amortization, asset and goodwill impairments, acquisition gain and general and administrative expenses. Segment Adjusted EBITDA is a key component of consolidated EBITDA, which is used as a supplemental financial measure by management and by external users of our financial statements such as investors, commercial banks, research analysts and others. We believe that the presentation of EBITDA provides useful information to investors regarding our performance and results of operations because EBITDA, when used in conjunction with related GAAP financial measures, (i) provides additional information about our core operating performance and ability to generate and distribute cash flow, (ii) provides investors with the financial analytical framework



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upon which we base financial, operational, compensation and planning decisions and (iii) presents a measurement that investors, rating agencies and debt holders have indicated is useful in assessing us and our results of operations.

Segment Adjusted EBITDA is also used as a supplemental financial measure by our management for reasons similar to those stated in the previous explanation of EBITDA. In addition, the exclusion of corporate general and administrative expenses, which are discussed above under "-Analysis of Historical Results of Operations," from consolidated Segment Adjusted EBITDA allows management to focus solely on the evaluation of segment operating profitability as it relates to our revenues and operating expenses, which are primarily controlled by our segments.

The following is a reconciliation of consolidated Segment Adjusted EBITDA to net income (loss), the most comparable GAAP financial measure:



                                                  Year Ended December 31,
                                             2021           2020           2019

                                                       (in thousands)

Consolidated Segment Adjusted EBITDA $ 549,252 $ 446,489 $ 672,001 General and administrative

                   (70,160)       (59,806)       (72,997)
Depreciation, depletion and
amortization                                (261,377)      (313,387)      (309,075)
Asset impairments                                   -       (24,977)       (15,190)
Goodwill impairment                                 -      (132,026)              -
Interest expense, net                        (39,141)       (45,478)       (45,496)
Acquisition gain                                    -              -        177,043
Income tax (expense) benefit                    (417)           (35)            211
Acquisition gain attributable to
noncontrolling interest                             -              -        (7,083)

Net income (loss) attributable to ARLP $ 178,157 $ (129,220) $ 399,414 Noncontrolling interest

                           598            169          7,512
Net income (loss)                         $   178,755    $ (129,051)    $   406,926

Segment Adjusted EBITDA Expense (a non-GAAP financial measure) includes operating expenses, coal purchases and other income (expense). Transportation expenses are excluded as these expenses are passed through to our customers and, consequently, we do not realize any gain or loss on transportation revenues.

Segment Adjusted EBITDA Expense is used as a supplemental financial measure by our management to assess the operating performance of our segments. Segment Adjusted EBITDA Expense is a key component of Segment Adjusted EBITDA in addition to coal sales, royalty revenues and other revenues. The exclusion of corporate general and administrative expenses from Segment Adjusted EBITDA Expense allows management to focus solely on the evaluation of segment operating performance as it primarily relates to our operating expenses.

The following is a reconciliation of consolidated Segment Adjusted EBITDA Expense to operating expense, the most comparable GAAP financial measure:



                                                  Year Ended December 31,
                                             2021           2020           2019

                                                       (in thousands)
Segment Adjusted EBITDA Expense           $   952,649    $   861,249    $ 1,204,896
Outside coal purchases                        (6,372)              -       (23,357)
Other income (expense)                        (3,020)        (1,593)            561
Operating expenses (excluding
depreciation, depletion and
amortization)                             $   943,257    $   859,656    $ 1,182,100


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Ongoing Acquisition Activities

Consistent with our business strategy, from time to time we engage in discussions with potential sellers regarding our possible acquisitions of certain assets and/or companies of the sellers. For more information on acquisitions, please read "Item 8. Financial Statements and Supplementary Data-Note 3 - Acquisitions" of this Annual Report on Form 10-K.

Liquidity and Capital Resources

Liquidity

We have historically satisfied our working capital requirements and funded our capital expenditures, investments, contractual obligations and debt service obligations with cash generated from operations, cash provided by the issuance of debt or equity, borrowings under credit and securitization facilities and other financing transactions. We believe that existing cash balances, future cash flows from operations and investments, borrowings under credit facilities and cash provided from the issuance of debt or equity will be sufficient to meet our working capital requirements, capital expenditures and additional investments, debt payments, contractual obligations, commitments and distribution payments. Nevertheless, our ability to satisfy our working capital requirements, to satisfy our contractual obligations, to fund planned capital expenditures, to service our debt obligations or to pay distributions will depend upon our future operating performance and access to and cost of financing sources, which will be affected by prevailing economic conditions generally, and in both the coal and oil & gas industries specifically, as well as other financial and business factors, some of which are beyond our control, including the COVID-19 pandemic. Based on our recent operating cash flow results, current cash position, anticipated future cash flows and sources of financing that we expect to have available, we anticipate remaining in compliance with the covenants of the Credit Agreement and expect to have sufficient liquidity to fund our operations and growth strategies. However, to the extent operating cash flow or access to and cost of financing sources are materially different than expected, future covenant compliance or liquidity may be adversely affected.

Please see "Item 1A. Risk Factors."

On October 13, 2021, AR Midland acquired approximately 1,480 oil & gas net royalty acres in the Delaware Basin from Boulders for a purchase price of $31.0 million in the Boulders Acquisition. This acquisition enhances our ownership position in the Permian Basin and furthers our business strategy to grow our Oil & Gas Royalties segment through accretive acquisitions. Following the Boulders Acquisition, we hold approximately 57,000 net royalty acres in premier oil & gas basins including our investment in AllDale III. For more information, please read "Item 8. Financial Statement and Supplemental Data-Note 3 - Acquisitions".

In May 2018, the Board of Directors approved the establishment of a unit repurchase program authorizing us to repurchase up to $100 million of ARLP common units. The program has no time limit and we may repurchase units from time to time in the open market or in other privately negotiated transactions.

The unit repurchase program authorization does not obligate us to repurchase any dollar amount or number of units. Since inception through December 31, 2021, we have purchased units for a total of $93.5 million under the program.

During the year ended December 31, 2021, we did not repurchase and retire any units. Please read "Item 5. Market for Registrant's Common Equity, Related Unitholder Matters and Issuer Purchases of Equity Securities" for more information on the unit repurchase program.

Cash Flows

Cash provided by operating activities was $425.2 million for 2021 compared to $400.6 million for 2020. The increase in cash provided by operating activities was primarily due to an increase in net income adjusted for non-cash items and favorable working capital changes primarily related to accounts payable and accrued payroll and related benefits, partially offset by unfavorable working capital changes related trade receivables, inventories and accrued taxes other than income taxes.

Net cash used in investing activities was $142.7 million for 2021 compared to $125.1 million for 2020. The increase in cash used in investing activities was primarily attributable Boulders Acquisition in 2021, partially offset by an increase in accounts payable and certain other accruals related to mine infrastructure, equipment and mining operations at various mines during 2021.

Net cash used in financing activities was $215.7 million for 2021 compared to $256.4 million for 2020. The decrease in cash used in financing activities was primarily attributable to reduced borrowings and payments on the revolving credit



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facility and reduced debt issuance costs in 2021, partially offset by increased payments and reduced borrowings on the securitization facility compared to 2020.

Cash Requirements

We currently estimate our 2022 annual cash requirements, including capital expenditures, scheduled payments on long-term debt, lease obligations, asset retirement obligation costs and workers' compensation and pneumoconiosis, to be in a range of $380.0 million to $400.0 million. Management anticipates having sufficient cash flow to meet 2022 cash requirements with our December 31, 2021 cash and cash equivalents of $122.4 million and cash flows from operations, or borrowings under revolving credit and securitization facilities if necessary.

We currently project average estimated annual maintenance capital expenditures over the next five years of approximately $5.41 per ton produced. For additional information on our future cash requirements other than capital expenditures, please see "Item 8. Financial Statements and Supplementary Data-Note 8 - Long-Term Debt," "-Note 9 - Leases," "-Note 16 - Employee Benefit Plans," "-Note 19 - Asset Retirement Obligations," "-Note 20 - Accrued Workers' Compensation and Pneumoconiosis Benefits" and "-Note 22 - Commitments and Contingencies." We will continue to have significant cash requirements over the long term, which may require us to incur debt or seek additional equity capital.

The availability and cost of additional capital will depend upon prevailing market conditions, the market price of our common units and several other factors over which we have limited control, as well as our financial condition and results of operations.

We use a combination of surety bonds and letters of credit to secure our financial obligations for reclamation, workers' compensation and other obligations as follows as of December 31, 2021:



                                         Workers'
                      Reclamation      Compensation
                      Obligation        Obligation      Other      Total

                                        (in millions)
Surety bonds         $       173.9    $         68.0    $ 12.6    $ 254.5
Letters of credit                -              32.3      16.8       49.1


Insurance

Effective December 1, 2021, we renewed our annual property and casualty insurance program. Our property insurance was procured from our wholly owned captive insurance company, Wildcat Insurance. Wildcat Insurance charged certain of our subsidiaries for the premiums on this program and in return purchased reinsurance for the program in the standard market. The maximum limit in the commercial property program is $100.0 million per occurrence, excluding a $1.5 million deductible for property damage, a 75- or 90-day waiting period for underground business interruption depending on the mining complex and an additional $10.0 million overall aggregate deductible. We have elected to retain a 10% participating interest in our commercial property insurance program. We can make no assurances that we will not experience significant insurance claims in the future that could have a material adverse effect on our business, financial condition, results of operations and ability to purchase property insurance in the future. Also, exposures exist for which no insurance may be available and for which we have not reserved. In addition, the insurance industry has been subject to efforts by environmental activists to restrict coverages available for fossil-fuel companies.

Debt Obligations

See "Item 8. Financial Statements and Supplementary Data-Note 8 - Long-Term Debt" for a discussion of our debt obligations.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition, results of operations, liquidity and capital resources is based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of our consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts and disclosures in the consolidated financial statements. We base our estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances. We discuss these estimates and judgments with the audit committee of the Board of Directors ("Audit Committee") periodically. Actual results may differ from these estimates. We have provided a description of all



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significant accounting policies in the notes to our consolidated financial statements. The following critical accounting policies are materially impacted by judgments, assumptions and estimates used in the preparation of our consolidated financial statements:

Business Combinations and Goodwill

We account for business acquisitions using the purchase method of accounting.

See "Item 8. Financial Statements and Supplementary Data-Note 3 - Acquisitions" for more information on the Wing and AllDale Acquisitions. Assets acquired and liabilities assumed are recorded at their estimated fair values at the acquisition date. The excess of purchase price over fair value of net assets acquired is recorded as goodwill. Given the time it takes to obtain pertinent information to finalize the acquired business' balance sheet, it may be several quarters before we are able to finalize those initial fair value estimates.

Accordingly, it is not uncommon for the initial estimates to be subsequently revised. The results of operations of acquired businesses are included in the consolidated financial statements from the acquisition date.

For the Wing Acquisition, we determined a fair value for the acquired mineral interests using a weighting of both income and market approaches. Our income approach primarily comprised of a discounted cash flow model. The assumptions used in the discounted cash flow model included estimated production, projected cash flows, forward oil & gas prices and a risk-adjusted discount rate. Our market approach consisted of the observation of acquisitions in the Permian Basin to determine a market price for similar mineral interests.

For the AllDale Acquisition, in addition to valuing the acquired assets and liabilities, we were required to value our previously held equity method investments in AllDale I & II just prior to the acquisition and record a gain as the fair value was determined to be higher than the carrying value of our equity method investments. We used a discounted cash flow model to re-measure our equity method investments immediately prior to the AllDale Acquisition as well as to value the mineral interests acquired. Assumptions used in our discounted cash flow model are similar to those discussed in the Wing Acquisition above.

The only indefinite-lived intangible that the Partnership currently has is goodwill. Goodwill is not amortized, but subject to annual reviews on November 30th for impairment at the reporting unit level. Goodwill is assessed for impairment more frequently if events or changes in circumstances indicate that it is more likely than not that goodwill is impaired. The reporting unit or units used to evaluate and measure goodwill for impairment are determined primarily from the manner in which the business is managed or operated. A reporting unit is an operating segment or a component that is one level below an operating segment.

The Partnership computes the fair value of its reporting units primarily using the income approach (discounted cash flow analysis). The computations require management to make significant estimates. Critical estimates are used as part of these evaluations include, among other things, the discount rate applied to future earnings reflecting a weighted average cost of capital rate, and projected coal price assumptions. Our estimate of the forward coal sales price curve and future sales volumes are critical assumptions used in our discounted cash flow analysis.

A discounted cash flow analysis requires us to make various judgmental assumptions about sales, operating margins, capital expenditures, working capital and coal sales prices. Assumptions about sales, operating margins, capital expenditures and coal sales prices are based on our budgets, business plans, economic projections, and anticipated future cash flows. In determining the fair value of our reporting units, we are required to make significant judgments and estimates regarding the impact of anticipated economic factors on our business. The forecast assumptions used in our assessments make certain assumptions about future pricing, volumes and expected maintenance capital expenditures. Assumptions are also made for a "normalized" perpetual growth rate for periods beyond the long range financial forecast period.

During the first quarter of 2020, we considered whether an interim test of our consolidated goodwill of $136.4 million was necessary. Our consolidated goodwill included $132.0 million recorded in conjunction with our acquisition of the Hamilton mine on July 31, 2015. We assessed certain events and changes in circumstances, including a) adverse industry and market developments, including the impact of the COVID-19 pandemic, b) our response to these developments, including temporarily ceasing production at several mines, including our Hamilton mine and c) our actual performance during the quarter. After consideration of these events and changes in circumstances, we performed an interim test of the goodwill associated with Hamilton comparing Hamilton's carrying amount to its fair value.



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We estimated the fair value of Hamilton using a discounted cash flow model. The assumptions used in the discounted cash flow model considered market conditions at the time of the assessment and our estimate of the mine's performance in future years based on the information available to us. The fair value of Hamilton was determined to be below its carrying amount (including goodwill) by more than the recorded balance of goodwill associated with the mine.

Accordingly, we recognized an impairment charge of $132.0 million consisting of the total carrying amount of goodwill associated with Hamilton. This impairment charge reduced our consolidated goodwill balance to $4.4 million. During the first quarter of 2020, we also performed tests on our goodwill balance associated with MAC using a discounted cash flow model and concluded no impairment was necessary. There were no impairments of goodwill during 2021 or 2019.

Our estimates of fair value are sensitive to changes in variables, certain of which relate to broader macroeconomic conditions outside our control. As a result, actual performance in the near and longer-term could be different from these expectations and assumptions. This could be caused by events such as strategic decisions made in response to economic and competitive conditions and the impact of economic factors, such as over production in coal and low prices of natural gas. In addition, some of the inherent estimates and assumptions used in determining fair value of the reporting units are outside the control of management, including interest rates, cost of capital and our credit ratings. While we believe we have made reasonable estimates and assumptions to calculate the fair value of the reporting units and other intangible assets, it is possible a material change could occur. See "Item 8. Financial Statements and Supplementary Data-Note 5 - Goodwill Impairment."

Oil & Gas Reserve Values

Estimated oil & gas reserves and estimated market prices for oil & gas are a significant part of our depletion calculations, impairment analyses, and other estimates. Following are examples of how these estimates affect financial results:

an increase (decrease) in estimated proved oil & gas reserves can reduce

? (increase) our units of production depreciation, depletion and amortization

rates; and

changes in oil & gas reserves and estimated market prices both impact projected

? future cash flows from our mineral interests. This in turn can impact our

periodic impairment analysis.

The process of estimating oil & gas reserves is very complex, requiring significant judgment in the evaluation of all available geological, geophysical, engineering and economic data. After being estimated internally, our proved reserves estimates are compared to proved reserves that are audited by independent experts in connection with our required year-end reporting. The data may change substantially over time as a result of numerous factors, including the historical 12 month average price, additional development cost and activity, evolving production history and a continual reassessment of the viability of production under changing economic conditions. As a result, material revisions to existing reserve estimates could occur from time to time. Such changes could trigger an impairment of our oil & gas mineral interests and have an impact on our depreciation, depletion and amortization expense prospectively.

Estimates of future commodity prices utilized in our impairment analyses consider market information including published forward oil & gas prices. The forecasted price information used in our impairment analyses is consistent with that generally used in evaluating third party operator drilling decisions and our expected acquisition plans, if any. Prices for future periods will impact the production economics underlying oil & gas reserve estimates. In addition, changes in the price of oil & gas also impact certain costs associated with our expected underlying production and future capital costs. The prices of oil & gas are volatile and change from period to period, thus are expected to impact our estimates. Significant unfavorable changes in the estimated future commodity prices could result in an impairment of our oil & gas mineral interests.

Workers' Compensation and Pneumoconiosis (Black Lung) Benefits

We provide income replacement and medical treatment for work-related traumatic injury claims as required by applicable state laws. We generally provide for these claims through self-insurance programs. Workers' compensation laws also compensate survivors of workers who suffer employment related deaths. Our liability for traumatic injury claims is the estimated present value of current workers' compensation benefits, based on our actuary estimates. Our actuarial calculations are based on a blend of actuarial projection methods and numerous assumptions including claim development patterns, mortality, medical costs and interest rates. See "Item 8. Financial Statements and Supplementary Data-Note 20 - Accrued Workers' Compensation and Pneumoconiosis Benefits" for additional discussion. We had accrued liabilities



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for workers' compensation of $53.4 million and $54.7 million for these costs at December 31, 2021 and 2020, respectively. A one-percentage-point reduction in the discount rate would have increased operating expense by approximately $4.1 million at December 31, 2021. We limit our exposure to traumatic injury claims by purchasing a high deductible insurance policy that starts paying benefits after deductibles for a particular claim year have been met. Our receivables for traumatic injury claims under this policy as of December 31, 2021 and 2020 are $5.7 million and $7.1 million, respectively.

Coal mining companies are subject to Federal Coal Mine Health and Safety Act of 1969, as amended, and various state statutes for the payment of medical and disability benefits to eligible recipients related to coal worker's pneumoconiosis, or black lung. We provide for these claims through self-insurance programs. Our pneumoconiosis benefits liability is calculated using the service cost method based on the actuarial present value of the estimated pneumoconiosis benefits obligation. Our actuarial calculations are based on numerous assumptions including disability incidence, medical costs, mortality, death benefits, dependents and discount rates. We had accrued liabilities of $111.3 million and $108.5 million for the pneumoconiosis benefits at December 31, 2021 and 2020, respectively. A one-percentage-point reduction in the discount rate would have increased the expense recognized for the year ended December 31, 2021 by approximately $3.0 million. Under the service cost method used to estimate our pneumoconiosis benefits liability, actuarial gains or losses attributable to changes in actuarial assumptions, such as the discount rate, are amortized over the remaining service period of active miners.

The discount rate for workers' compensation and pneumoconiosis is derived by applying the Financial Times Stock Exchange Pension Discount Curve to the projected liability payout. Other assumptions, such as claim development patterns, mortality, disability incidence and medical costs, are based upon standard actuarial tables adjusted for our actual historical experiences whenever possible. We review all actuarial assumptions periodically for reasonableness and consistency and update such factors when underlying assumptions, such as discount rates, change or when sustained changes in our historical experiences indicate a shift in our trend assumptions are warranted.

Impairment of Long-Lived Assets

In addition to oil & gas reserves discussed above in the Oil & Gas Reserve Values section, we review the carrying value of long-lived assets and certain identifiable intangibles whenever events or changes in circumstances indicate that the carrying amount may not be recoverable based upon estimated undiscounted future cash flows. Long-lived assets and certain intangibles are not reviewed for impairment unless an impairment indicator is noted. Several examples of impairment indicators include:

? A significant decrease in the market price of a long-lived asset;

? A significant adverse change in the extent or manner in which a long-lived

asset is being used or in its physical condition;

A significant adverse change in legal factors or in the business climate that

? could affect the value of a long-lived asset, including an adverse action of

assessment by a regulator;

? An accumulation of costs significantly in excess of the amount originally

expected for the acquisition or construction of a long-lived asset;

A current-period operating or cash flow loss combined with a history of

? operating or cash flow losses or a projection or forecast that demonstrates

continuing losses associated with the use of a long-lived asset; or

A current expectation that, more likely than not, a long-lived asset will be

? sold or otherwise disposed of significantly before the end of its previously

estimated useful life. The term more likely that not refers to a level of

likelihood that is more than 50 percent.

The above factors are not all inclusive, and management must continually evaluate whether other factors are present that would indicate a long-lived asset may be impaired. If there is an indication that the carrying amount of an asset may not be recovered, we compare our estimate of undiscounted future cash flows attributable to the asset to the carrying value of the asset. Individual assets are grouped for impairment review purposes based on the lowest level for which there is identifiable cash flows that are largely independent of the cash flows of other groups of assets, generally on a by-mine basis. Assumptions about sales, operating margins, capital expenditures and sales prices are based on our budgets, business plans, economic projections, and anticipated future cash flows. If the carrying value of an asset exceeds the future undiscounted cash flows expected from the asset, the amount of impairment is measured by the difference between the carrying value and the fair value of the asset. The fair value of impaired assets is typically determined based on various factors, including the present values of expected future cash flows using a risk adjusted discount rate, the marketability of coal properties and the estimated fair value of assets that could be sold or used at other operations. We recorded asset



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impairments of $25.0 million and $15.2 million 2020 and 2019, respectively. There were no asset impairments during 2021. See "Item 8. Financial Statements and Supplementary Data-Note 4 - Long-Lived Asset Impairments".

Asset Retirement Obligations

SMCRA and similar state statutes require that mined property be restored in accordance with specified standards and an approved reclamation plan. A liability is recorded for the estimated cost of future mine asset retirement and closing procedures on a present value basis when incurred or acquired and a corresponding amount is capitalized by increasing the carrying amount of the related long-lived asset. Those costs relate to permanently sealing portals at underground mines and to reclaiming the final pits and support surface acreage for both our underground mines and past surface mines. Examples of these types of costs, common to both types of mining, include, but are not limited to, removing or covering refuse piles and settling ponds, water treatment obligations, and dismantling preparation plants, other facilities and roadway infrastructure. Accrued liabilities of $131.1 million and $127.9 million for these costs are recorded at December 31, 2021 and 2020, respectively. See "Item 8. Financial Statements and Supplementary Data-Note 19 - Asset Retirement Obligations" for additional information. The liability for asset retirement and closing procedures is sensitive to changes in cost estimates, estimated mine lives and timing of post-mine reclamation activities. As changes in estimates occur (such as mine plan revisions, changes in estimated costs or changes in timing of the performance of reclamation activities), the revisions to the obligation and asset are recognized at the appropriate credit-adjusted, risk-free interest rate.

Accounting for asset retirement obligations also requires depreciation of the capitalized asset retirement cost and accretion of the asset retirement obligation over time. Depreciation is generally determined on a units-of-production basis and accretion is generally recognized over the life of the producing assets.

On at least an annual basis, we review our entire asset retirement obligation liability and make necessary adjustments for permit changes approved by state authorities, changes in the timing of reclamation activities, and revisions to cost estimates and productivity assumptions, to reflect current experience. There were no material adjustments to the liability associated with these assumptions for the year ended December 31, 2021. Adjustments to the liability associated with these assumptions resulted in a decrease of $11.9 million for the year ended December 31, 2020.

While the precise amount of these future costs cannot be determined with certainty, we have estimated the costs and timing of future asset retirement obligations escalated for inflation, then discounted and recorded at the present value of those estimates. Discounting resulted in reducing the accrual for asset retirement obligations by $98.3 million and $102.1 million at December 31, 2021 and 2020. We estimate that the aggregate undiscounted cost of final mine closure is approximately $229.4 million and $230.0 million at December 31, 2021 and 2020, respectively. If our assumptions differ from actual experiences, or if changes in the regulatory environment occur, our actual cash expenditures and costs that we incur could be materially different than currently estimated.

Shelf Registration Statement

In February 2018, we filed with the SEC a universal shelf registration statement which allowed us to issue from time to time an indeterminate amount of debt or equity securities ("2018 Registration Statement"). The 2018 Registration Statement expired in February 2021. We did not utilize any amounts available under the 2018 Registration Statement. We currently intend to file with the SEC a new universal shelf registration statement.

Related-Party Transactions

See "Item 8. Financial Statements and Supplementary Data-Note 21 - Related-Party Transactions" for a discussion of our related-party transactions.

Accruals of Other Liabilities

We had accruals for other liabilities, including current obligations, totaling $318.9 million and $321.3 million at December 31, 2021 and 2020, respectively. These accruals were chiefly comprised of workers' compensation benefits, pneumoconiosis benefits, and costs associated with asset retirement obligations. These obligations are self-insured except for certain excess insurance coverage for workers' compensation. The accruals of these items were based on estimates of future expenditures based on current legislation, related regulations and other developments. Thus, from time to time, our results of operations may be significantly affected by changes to these liabilities. Please see "Item 8. Financial Statements



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and Supplementary Data-Note 19 - Asset Retirement Obligations" and "-Note 20 - Accrued Workers' Compensation and Pneumoconiosis Benefits."

Inflation

Any future inflationary or deflationary pressures could adversely affect the results of our operations. For example, at times our results have been significantly impacted by price increases affecting many of the components of our operating expenses such as fuel, steel, maintenance expense and labor.

Please see "Item 1A. Risk Factors."

New Accounting Standards

See "Item 8. Financial Statements and Supplementary Data-Note 2 - Summary of Significant Accounting Policies" for a discussion of new accounting standards.

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