Categorical Exclusion Determination
Office of NEPA Policy and Compliance
October 11, 2018
minute read time
Past flooding events at the Idaho National Laboratory Site have created large sedimentary interbeds in wells that affect groundwater flow in the Eastern Snake River Plain Aquifer. The proposed action examines past sedimentary deposits in well cores in the southwest corner of the Idaho National Laboratory Site and surficial material deposits in the Idaho National Laboratory Spreading Areas to evaluate the relationship between historic flooding deposition and glacial outburst flows at the Idaho National Laboratory Site.