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 (determined to be a complete fish barrier by WDFW) 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. The project's expected benefits include: improving fish access to the East Fork basin for adult salmon (some make it through the existing culverts but only under duress), provide access to out-of-basin juveniles to 2.1 historically tidal stream miles, create or dramatically improve 2.8 acres of tidal habitat, and improve water quality and temperature in lower East Fork by tidal flushing.Future phases of work (Phase 2 and 3 are at the 30% design level) will correct three confirmed partial fish barriers upstream, strengthen the tidal signal and prism in upper portions of the tidal stream, replace an undersized tidal culvert with a bridge, and reconnect select portions of tidal floodplain.