Fact Sheet

• Second-largest eastern U.S. coal producer
• Began mining operations in 1971
• Has a high percentage of sales tied to long-term contracts
• Sold 40.4 million tons of coal in 2018
• Produces a diverse range of steam coals, satisfying a broad range of customer specifications
• Operates eight underground mining complexes in five states - Illinois, Indiana, Kentucky, Maryland and West Virginia and also operates a coal-loading terminal on the Ohio River at Mt. Vernon, Indiana
• Mining operations are near major utility generating plants
• Generate royalty income from mineral interests in premier oil & gas producing regions in the United States, primarily the Anadarko, Permian, Williston and Appalachian basins
• Trades tax-advantaged, high-yield common units on the Nasdaq National Market under the symbol "ARLP"

Coal Reserves

Our coal reserve base is significant enough to preserve the Partnership's continuity over the long term. The coal reserves reported by Alliance are those that we believe can be economically and legally extracted or produced. As of December 31, 2018, ARLP had approximately 1.70 billion tons of proven and probable reserves.

Our reserve estimates are based on geological data that is analyzed by Alliance's staff of geologists and engineers. The data is gathered through extensive and ongoing exploratory drilling and in-mine channel sampling programs.

Additionally, our criteria adhere to standards as defined by the U.S. Geological Survey.

The following table defines Alliance's coal reserves as of December 31, 2018, by mining complex.

Transportation

Our coal is transported to our customers by rail, barge and truck. We produce a diverse range of steam and metallurgical coal with varying sulfur and heat contents, which enables us to satisfy the broad range of specifications required by our customers. In 2018, we sold a record 40.4 million tons of coal and produced 40.3 million tons. The coal we sold in 2018 was approximately 28.1% low-sulfur coal, 40.1% medium-sulfur coal and 31.8% 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%. In 2018, approximately 68.2% of our tons sold were purchased by United States electric utilities and 27.8% were sold into the international markets through brokered transactions. The balance of our tons sold were to third-party resellers and industrial consumers. For tons sold to United States electric utilities, 100% were sold to utility plants with installed pollution control devices. The BTU content of our coal ranges from 11,400 to 13,200.