Fish Passage Culvert Analysis and Design, Structure No. 21199 (OR)
WEST Consultants, Inc. was contracted by the Oregon Department of Transportation (ODOT) to complete a hydraulic engineering analysis and design for the replacement of a culvert located on Highway 180 at Milepost 4.0. The existing 18-inch-diameter concrete pipe culvert is to be replaced to improve fish passage. The culvert carries State Highway 180 between the towns of Eddyville and Blodgett.

WEST conducted hydrologic analysis, hydraulic modeling using HEC-RAS, designed erosion protection and assisted ODOT in developing plans for construction. The proposed replacement culvert will be a 72-foot long 73-inch by 55-inch Corrugated Steel Arch Pipe embedded to a depth of approximately 21 inches.