Background

The 45th Avenue SW and California Avenue SW culverts, located along Fauntleroy Creek in West Seattle, are extremely deteriorated and in poor structural condition. The culverts have deformed pipes, roots intruding into the pipe, and are missing portions of pipe. These conditions increase the risk of backups and need for emergency maintenance response. Repairing these culverts is not a viable strategy for these culverts due to their age and condition. 

The culverts at 45th Avenue SW and California Avenue SW also prevent fish passage in Fauntleroy Creek. New culverts would be sized based on Washington Department of Fish and Wildlife’s (WDFW) Stream Crossing Guidelines to meet fish passage criteria which is anticipated to result in upsizing the current culvert when it is replaced.