BPA Proposal 31019

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 yds2

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 DataCritical 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?