The proposed restoration project will replace an existing 11-foot (ft) wide by 7-ft tall by 44-ft long bridge with a concrete floor with an approximate 24-ft wide by 9-ft tall by 60-ft long box culvert at Logan Hill Rd milepost 1.03 in Lewis County, WA. This barrier structure, which carries flows from Berwick Creek, is 0% passable due to a slope of >4%. The "Prioritized Chehalis Barriers - May 2020" layer in the Chehalis Fish Passage Barrier Prioritization (CFPBP) mapper identifies the existing barrier as a Priority 1 barrier. Replacement of this culvert is expected to restore immediate seasonal access to 5.57 linear miles of habitat for the Southwest Washington (SWW) Distinct Population Segment of winter steelhead trout and 6.76 linear miles of habitat for the SWW Evolutionarily Significant Unit of coho salmon. Unimpeded access to this habitat for steelhead and coho will be restored upstream of this site once downstream seasonal barriers are removed. According to the CFPBP mapper total accessible habitat above this culvert once all downstream and upstream barriers are removed will be 6.48 linear miles for steelhead and 7.67 linear miles for coho. Additional construction will include 621 ft of realignment/regrade of streambed material within the channel to provide fish passage during all flows.  Channel regrade activities were limited to the minimum distance required to meet stream simulation design. Large woody debris will maintain the thalweg and passage during low flows.