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Fish Passage Design Projects in Whatcom County

Fain Environmental performed a hydrologic, hydraulic, and geomorphic assessment of seven existing undersized culverts on residential properties in Whatcom County. We developed a hydrologic and hydraulic 1-D Hydrologic Engineering Center-River Analysis System (HEC-RAS) for existing culverts and proposed bridges. Fain Environmental designed seven full-span bridges to allow for fish passage. Additionally, we analyzed potential scour and clearance between the 100-year water level and the proposed bridge. Annika Fain, PE, is the design engineer of record.

Culvert removal and bridge installation, Goodwin Creek, Anderson Property

Location: Whatcom County, Washington

WRIA 1: Nooksack

Owner: Nooksack Salmon Enhancement Association

Year: 2021-2023


  • Fish Passage Design
  • Hydrologic and Hydraulic Modeling
  • Geomorphic Assessment
  • Scour Analysis