DESCRIPTION
January 2015 Update: The Grant was written under the assumption that the existing failing steel culvert woud be replaced, "with a 24 to 30 foot bottomless concrete box (culvert), essentially a short bridge". In further considering the difference in elevation between the existing road surface and the creek and the issues associated with constructability, we are in the process of considering whether a short concrete bridge supported by piles may be a more appropriate alternative for this site.
Jefferson County has completed the eight proposed design elements of this 2014 PSAR/PIDA grant and have produced a ‘shovel ready’ project. To replace the existing fish passage barrier steel culvert, PS&E for an 80 ft span, concrete bridge were produced. Prior to PS&E completion a right-of-way / topographic survey, completed by a licensed surveyor, a cultural resources report/survey, a geotechnical study, which gathered the required information to adequately design the bridge foundation, and a hydraulic analysis were all completed. Removal of the West Uncas Road fish passage barrier is one of the final remaining salmon habitat improvement projects identified on Salmon Creek. Over the last decade, successful partnerships have led to grant-funded projects targeting restoration of listed summer chum habitat within this watershed. The Uncas Road culvert replacement project is expected to 1) Improve watershed continuity 2) Restore summer chum habitat 3) Improve spawning success of important salmon stock and 4) Improve fish access to high quality spawning and rearing habitat upstream of the culvert. Additionally, should the culvert fail, it could cause significant damage to restoration already completed downstream.