* Comments: 

NRP: a limited partnership engaged principally in the business of owning and managing coal properties in the three coal-producing regions of the United States: Appalachia, the Illinois Basin and the Western United States. As of December 31, 2009, the Company owned or controlled approximately 2.1 billion tons of proven and probable coal reserves. It does not operate any mines, but lease coal reserves to mine operators under long-term leases that grant the operators the right to mine its coal reserves in exchange for royalty payments. As of December 31, 2009, the Company's coal reserves were subject to 210 leases with 72 lessees. During the year ended December 31, 2009, its lessees produced 46.8 million tons of coal from its properties. The Company's operations are conducted through, and its operating assets are owned by, its subsidiaries. It owns its subsidiaries through a wholly owned operating company, NRP (Operating) LLC. NRP (GP) LP.

PVG: a partnership that owns three types of equity interests in Penn Virginia Resource Partners, L.P. (PVR), a partnership engaged in the management of coal and natural resource properties and the gathering and processing of natural gas. The Company's interests in PVR includes a 2% general partner interest, which it holds through its 100% ownership interest in Penn Virginia Resource GP, LLC, PVR's general partner; all of the incentive distribution rights (IDRs), in PVR, which the Company holds through its 100% ownership interest in PVR's general partner, and an approximately 37% limited partner interest in PVR. PVR operates through two business segments: coal and natural resource management, and natural gas midstream.

PVR: is engaged in the management of coal and natural resource properties and the gathering and processing of natural gas in the United States. The Company conducts operations in two business segments: coal and natural resource management, and natural gas midstream. During the year ended December 31, 2008, approximately 84% of its operating income was attributable to its coal and natural resource management segment, and approximately 16% of its operating income was attributable to its natural gas midstream segment.