Bureau of Land Management: Administers 264 million acres of public lands, located primarily in the 12 western states, containing natural, historical, cultural, recreational, and economic resources

National Park Service: Official site, with extensive information on America's National Parks and their management

Office of Surface Mining (OSM): Oversees the regulation of coal mining and the reclamation of old mines

U.S. Fish and Wildlife Service: Agency with mission of conserving, protecting and enhancing fish, wildlife, and plants and their habitats for the continuing benefit of the American people