Imperial Mine Mill

Imperial Mine Mill is a superfund site located at N Of Nf Development Rd 5540 & 920 Junction, 14 Mi Nw Of Sumpter, Sumpter, OR 97877. The Environmental Protection Agency (EPA) identifies sites such as Imperial Mine Mill because they pose or had once posed a potential risk to human health and/or the environment due to contamination by one or more hazardous wastes. Imperial Mine Mill is currently registered as an Active superfund site by the EPA. However, it is not on the NPL (National Priorities List), which means the EPA does not consider it one of the nation's most hazardous waste sites.