July 22, 2008

Atlas Energy Resources, LLC Announces Record Distribution of $0.61 Per Common Unit for the Second Quarter 2008

Atlas Energy Resources, LLC (NYSE:ATN) reported today that it has declared its record quarterly cash distribution for the second quarter 2008 of $0.61 per common unit. This $0.61 per common unit distribution represents a $0.02 increase, or 3.4% increase, over the first quarter 2008 distribution of $0.59 per common unit, as well as a 42% increase from the second quarter 2007 distribution of $0.43 per common unit. The distribution is payable Thursday, August 14, 2008 to holders of record as of Wednesday, August 6, 2008.

Atlas Energy Resources, LLC develops and produces domestic natural gas and to a lesser extent, oil. Atlas Energy is one of the largest independent energy producers in the Appalachian Basin and northern Michigan. Atlas Energy sponsors and manages tax-advantaged investment partnerships, in which we co-invest, to finance the exploration and development of our acreage in the Appalachian Basin. We are active principally in Pennsylvania, Michigan and Tennessee. For more information, visit Atlas Energy's website at www.atlasenergyresources.com or contact investor relations at [email protected]

Atlas America, Inc. (NASDAQ:ATLS) owns 1.1 million limited partner units of Atlas Pipeline Partners, L.P., and an approximate 64% limited partner interest in Atlas Pipeline Holdings, L.P., which holds the general partner interest and 5.75 million limited partner units of Atlas Pipeline Partners, L.P. Atlas America, Inc. also owns an approximate 48% common unit interest and all of the Class A and management incentive interests in Atlas Energy Resources, LLC (NYSE: ATN). For more information, please visit our website at www.atlasamerica.com, or contact Investor Relations at [email protected]