BPA Proposal Fish Passage Assessment & Prioritization Program Washington County Land Use & Transportation Greg Miller, P.E., Operations Manager Principal Investigator: Janet Oatney
Scope of the Problem ODF&W evaluated 69 of approximately 3000 existing culverts
Typical Washington Co. Culverts
Consistent Limiting Factors Watershed Subbasin Province Basin
Relationship to Hydro System 24 Dams in the Willamette Subbasin 4,751,308 yds 2 spawning habitat lost
5th Field Approach - Highest Priority First Evaluate each barrier in relationship to obtaining access to core areas of productive habitat
USFS Measurements of Surrogates Indicative of Hydraulic Conditions
Integration of Existing Data Critical Component Concept Stream slope Culvert slope Bankfull width & velocity Jump Flow & water depth Culvert size & condition Habitat quality
Prioritization Methodology Barrier Analysis Corridor Analysis Transportation Factors
Effects Summary Share information Biggest bang for our environmental buck Improve habitat Useable for private property information
If We Do Nothing Projects selected based on transportation system needs Greatly reduced gain in accessible habitat
Questions?