DESCRIPTION
The project will implement the first of three restoration phases designed to dramatically improve fish passage to 17 stream miles in the East Fork Deep River system while also reducing the severity, duration, and frequency of flooding to private agricultural land and County roads. This first phase will replace a bank of undersized culverts and tide gates with a 40'-wide, 3-bay box culvert equipped with three muted tidal regulators designed to meet Oregon's Tidal Area Restoration Program guidelines. It will also expand and improve channel edge habitat in the first 0.8 miles of (tidal) East Fork channel and remove two channel constrictions that contribute to flooding. Future phases of work will address partial fish barriers upstream and reconnect select portions of floodplain.
The project will implement the first of three restoration phases designed to dramatically improve fish passage to 17 stream miles in the East Fork Deep River system while also reducing the severity, duration, and frequency of flooding to private agricultural land and County roads. This first phase will replace a bank of undersized culverts and tide gates with a 40'-wide, 3-bay box culvert equipped with three muted tidal regulators (MTRs) designed to meet Oregon's Tidal Area Restoration Program guidelines. The new structure will dramatically increase flow capacity through the dike, reducing rain-driven flooding upstream. The new culvert and MTRs are designed to maintain minimum water depths and maximum water flows inside the structure to maximize fish passage, particularly for juvenile salmon. The project will also expand and improve tidal pool and channel edge habitat in the first 0.8 miles of (tidal) East Fork channel, add targeted large wood habitat structures, and remove two channel constrictions that contribute to flooding. Future phases of work will address partial fish barriers upstream and reconnect select portions of floodplain.
