DOE/EA-2144, prepared by DOE’s National Nuclear Security Administration (NNSA), evaluates the potential environmental impacts of a proposal to construct and operate the Oak Ridge Enhanced Technology and Training Center (ORETTC) to train first responders and other experts in nuclear operations, safeguards, and emergency response. The proposed site for the ORETTC is on the Oak Ridge Reservation in Oak Ridge, Tennessee, approximately 5 miles west of the Y-12 National Security Complex site. Proposed facilities would consist of a Simulated Nuclear and Radiological Activities Facility and a Technical Rescue Training Area; an Emergency Response Training Facility; a maintenance building; and utilities, roads, and supporting infrastructure.