Keith’s and his staff led the NEPA, Cultural Resources, Landscape Architecture and Fish and Wildlife assessments for the I-90 Corridor Improvement Program. Scope of Work included: NEPA and SEPA processes and securing all regulatory permits, including Section 4(f) identifying that the project will have no more than a de minimis impact on the project area; section 106 of the National Historic Preservation Act (NHPA) in coordination with the State Department of Archaeology and Historic Preservation (DAHP) and the State Historic Places Office (SHPO) and the Clean Water and the Endangered Species Acts. WA.