The U.S. Army Corps of Engineers (USACE) Portland District requires the Design-Build of a Self-cleaning screen system rated for juvenile fish at Dexter Dam Adult Fish Facility water intake system as r... The U.S. Army Corps of Engineers (USACE) Portland District requires the Design-Build of a Self-cleaning screen system rated for juvenile fish at Dexter Dam Adult Fish Facility water intake system as required by NMFS. See the attached for all details.