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Published byEmily Sandoval Modified over 11 years ago
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BPA Proposal 31019 Fish Passage Assessment & Prioritization Program Washington County Land Use & Transportation Greg Miller, P.E., Operations Manager Principal Investigator: Janet Oatney
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Scope of the Problem ODF&W evaluated 69 of approximately 3000 existing culverts
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Typical Washington Co. Culverts
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Consistent Limiting Factors Watershed Subbasin Province Basin
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Relationship to Hydro System 24 Dams in the Willamette Subbasin 4,751,308 yds 2 spawning habitat lost
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5th Field Approach - Highest Priority First Evaluate each barrier in relationship to obtaining access to core areas of productive habitat
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USFS Measurements of Surrogates Indicative of Hydraulic Conditions
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Integration of Existing Data Critical Component Concept Stream slope Culvert slope Bankfull width & velocity Jump Flow & water depth Culvert size & condition Habitat quality
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Prioritization Methodology Barrier Analysis Corridor Analysis Transportation Factors
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Effects Summary Share information Biggest bang for our environmental buck Improve habitat Useable for private property information
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If We Do Nothing Projects selected based on transportation system needs Greatly reduced gain in accessible habitat
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Questions?
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