Researcher Dwayne Estes is leading efforts to restore the imperiled tallgrass prairies of central and western Kentucky and Tennessee through his Pennyroyal Plain Prairie Restoration Project (PPPRP). Prior to 1800, these prairies covered 3.7 million acres and supported bison and prairie chickens. Today, nearly 99.9% of the prairie has been destoryed; the last remnants can be found at Fort Campbell Army Base near Clarksville, TN. Estes has built a coalition of state and federal agencies, private corporations and businesses, and local and state leaders to help restore the 300 acres of prairie remnants on public land, using seed from the prairie at Fort Campbell, and to search for privately owned prairie remnants and work to secure those prairies from further loss.