The Fremont National Forest/White King and Lucky Lass Uranium Mines (USDA) site is located in Lake County, Oregon. The site encompasses 140 acres affected by uranium mining activities during the 1950s and 1960s. The site consists of two former uranium mines, the White King Mine and the Lucky Lass Mine, located within one mile of each other. Mining operations at the site between the 1950s and 1960s, and the waste materials left on site following mining operations, contaminated soil, surface water, sediment and groundwater with heavy metals and radioactive constituents. Following cleanup, operation and maintenance activities are ongoing.