This project replaced an undersized culvert on Forest Service Road 40N39 on Kelly Gulch, a tributary to the North Fork Salmon River within the Klamath National Forest in Siskiyou County, with a bottomless arch culvert allowing natural passage of aquatic organisms, water, sediment, and debris. The culvert was one of the only remaining barriers to anadromous fish on the Klamath National Forest Transportation System, benefiting SONCC coho salmon, steelhead trout, and potentially Pacific lamprey.