Lower Coho Creek Fish Passage Project

Estimated project cost range: $585,000 - $785,000 *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document. The work consists of supplying all labor, tools, equipment, and materials, not included any materials previously purchased and provided for the project, necessary to remove and construct a new structure on Wahanna Road, and includes, but is not limited to, the following work elements (see details in Description of Project Section): i Fish Salvage and Work Isolation i Site preparation and Subgrade Footing Placement (incl natural substrate) i Install Channel Spanning Structure,Utilities Relocation, and Road Resurfacing i Site rehabilitation, large wood placement, and native planting i New utility water main and sewer installation** Complete all work to be done under the contract no later than September 15st, 2023. The project is a collaboration between the Necanicum Watershed Council and the City of Seaside. Funds have been secured from the Oregon Watershed Enhancement Board, City of Seaside, Oregon Department of Fish and Wildlife, and Pacific Lamprey Conservation Initiative to leverage the successful completion of this project. The Lower Coho Creek Fish Passage goal is to restore full volitional access to 1.4 miles of spawning and rearing habitat needs of local fish populations through the removal of two undersized culverts and associated berm structures currently supporting City of Seaside utilities. This project represents the final barrier for this system to re-establish habitat connectivty to a tributary of Neawanna Estuary in the Necanicum River watershed. The is positioned in critical transition area adjacent to head of tide and funtioning marsh plain habitat. The project proposes to replace the existing undersized culverts crossing under Wahanna Road with a 19' open bottom, multiplate arch with natural stream simulation substrate that meets state and federal fish passage criteria.

Division 35 -

Waterway and Marine Construction, Common Work Results for Waterway and Marine Construction, Waterway and Marine Construction and Equipment, Marine Construction and Equipment.