Summary
The National Science Foundation (NSF) prepared an environmental assessment (EA) to evaluate construction and operation of the proposed Laser Interferometer Gravitational-Wave Observatory (LIGO) Science, Technology, Engineering, and Math (STEM) Exploration Center (LExC) facility at Hanford.
LIGO is a national facility for gravitational-wave research located at the Hanford Site (LIGO Hanford) and is funded by NSF and operated by the California Institute of Technology. LIGO Hanford is located on land owned by the United States and administered by DOE. Per its 1993 Memorandum of Understanding with DOE, NSF has a permit to use the site for LIGO Hanford.
DOE adopted the NSF EA (DOE/EA-2148) and issued a finding of no significant impact.