Baskett Slough National Wildlife Refuge, Dusky Marsh Fish Passage

KPFF provided civil and water resources engineering as well as environmental permitting for this fish passage and stream restoration project at the USFWS Baskett Slough National Wildlife Refuge near Dallas, Oregon. This project restored fish passage to approximately 2,700 feet of Baskett Slough below the Cackler Marsh levee and created a meandering slough out of the previously straight trapezoidal channel. Additionally, it restored Harland Slough to reduce long-term refuge maintenance and improve slough habitat. The project removed the Dusky Marsh levee and created a new curved setback levee to maintain Dusky Marsh as an off-channel wetland and designed a new Cackler riser structure to manage water levels.

The project restoration also included the placement of large wood and 43 acres of riparian buffer, floodplain, native wet prairie, and berm plantings. In additional to designing all aspects of the project, KPFF assisted USFWS with federal, state, and local permitting and environmental documentation including ordinary high water delineation, functional assessment, 1200-C, No-Rise Analysis, assisted USFWS with the Joint Permit Application, and Agency coordination. KPFF also provided construction services.