The Environmental Protection Agencys (EPA) Radiation Protection Division works to address hazards posed by technologically enhanced naturally occurring radioactive materials (TENORM). As one part of EPAs efforts to characterize risk from TENORM sources and to identify where TENORM problems may exist, we have been investigating the potential environmental hazards of wastes from abandoned uranium mines in the western United States. Between the 1940s and 1990s, thousands of uranium mines operated in the United States, mostly in the western continental U.S., leaving a legacy of potential radiological and chemical hazards. In order to help us identify where potential problems may occur, we have compiled mine location information from federal, state, and Tribal agency partners to develop a database that can be used with geographic information system (GIS) software. Most mines producing uranium as a primary commodity are, or were located, in Colorado, Utah, Wyoming, New Mexico and Arizona, and are typically on federal and Tribal lands. The current number of locations associated with uranium, as identified in the EPA database, is around 15,000. Of these uranium locations, over 4,000 are mines having documented production. Uranium mines, particularly conventional type operations, have the potential to become health hazards if they are not appropriately closed. Three uranium mines presently are on the National Priorities List (Superfund), while others are in the EPA Comprehensive Environmental Response, Compensation and Liability Information System (CERCLIS) hazardous waste database. The database does not reflect the current reclamation status of the approximately 15,000 uranium locations.