The National Oceanic and Atmospheric Administration (NOAA) has prepared a Final Environmental Assessment (EA) and Finding of No Significant Impact (FONSI) for the replacement of the existing seawater treatment and distribution system and construction of up to four new research laboratory / office buildings and associated improvements at the site. The EA analyzes the potential environmental impacts of its proposed action at the National Marine Fisheries Service (NMFS) Northwest Fisheries Science Center (NWFSC) Manchester Research Station, at 7305 Beach Drive East in Manchester, Washington. The Draft EA was made available for public comment during a 30-day review period, ending December 22, 2022. Comments received during the public review period have been considered and incorporated into the Final EA, as appropriate.