PROJECTS

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Chehalis Basin

Big Hanaford Creek

Wallooskee-Youngs

Mitchell Creek

Gallagher Creek

Lower and Middle Molalla River

Greater Yamhill Watershed

Pine Hollow-Jackknife Creek

South Hanaford Basin

Rinearson Slough

Property Screening Tool

Beaver Creek

Lamprey Migration Study

Rinearson Natural Area

Lower Molalla River Floodplain

Garret Creek

Wetland Delineations for Adapt

Mt Pisgah Viewshed Analysis

Chehalis Basin MitigatioN Bank 
Hanaford Valley, Centralia, WA

Cascade designed the Chehalis Basin Mitigation Bank to complement and provide additional lift to the adjacent Big Hanaford Creek Mitigation Site by restoring, rehabilitating, and enhancing riverine wetlands and floodplain function in the Hanaford Valley.

Cascade developed the site plans and the Mitigation Bank Instrument and worked with the client to navigate the agency approval process. Restoration actions included site grading and ditch filling to reconnect stream channels and improve hydrologic functions, placement of aquatic and terrestrial habitat structures (large wood), weed management, and re-vegetation with native species.

Because the site contributes additional area to an existing mitigation project, available wetland functions assessment methods were unable to characterize the functional lift. Cascade instead developed a project-specific wetland functions assessment methodology. Technical review of the Mitigation Bank Instrument was completed in 18 months.

Site construction was completed in the Spring of 2018.

Service Areas

Mitigation Banking, NRDA, and Ecosystem Markets 
Wetland Science and Environmental Permitting