bpa proposal 31019 fish passage assessment & prioritization program washington county land use...
TRANSCRIPT
![Page 1: BPA Proposal 31019 Fish Passage Assessment & Prioritization Program Washington County Land Use & Transportation Greg Miller, P.E., Operations Manager Principal](https://reader036.vdocuments.net/reader036/viewer/2022062618/5514e9f0550346b0478b5b9e/html5/thumbnails/1.jpg)
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 yds2
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 DataCritical 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?