This restoration project proposes to replace an existing 6-foot wide by 4-foot tall corrugated steel squash pipe, which is only 33 percent passable due to a slope of 1.7 percent, with a 20-foot wide by 13-foot tall by 78-foot long split box culvert. The project is located at approximately milepost 4.39 of Lucas Creek Road, approximately 4.5 miles north of Onalaska in Lewis County under the legal description of Township 14 North, Range 1 East, Section 32. The Chehalis Fish Passage Barrier Prioritization mapper (May 2020) identifies the existing barrier as a Priority 1 barrier. According to the SWIFD layers found in the Chehalis Fish Passage Barrier Prioritization mapper (May 2020), replacement of this culvert will restore immediate unimpeded access to 1.88 linear miles of potential habitat for the Southwest Washington Evolutionarily Significant Unit of coho salmon and 1.74 linear miles of habitat for the Southwest Washington Distinct Population Segment of winter steelhead trout. According to Lewis Conservation District, who performed a full stream habitat survey of Lucas Creek and its tributaries in 2002, the proposed project will restore access to 37,501 square feet of spawning area and make accessible 22,400 square feet of rearing habitat. Additional construction is anticipated to include the installation of streambed, riparian trees and shrubs in disturbed areas, and guardrail to improve roadway safety.