Anderson Creek

Anderson Creek

The project will replace 87 feet of a 6-foot diameter Corrugated Metal Pipe (CMP) with an 8-foot by 6-foot Reinforced Concrete Box (RCB) culvert on Route 254 at post mile 1.82 in Humboldt County. Due to activities upstream the culvert gets clogged with debris resulting in a backwater effect during high water flows. The entire culvert is approximately 213 feet long and consists of an 87-foot long by 6-foot diameter CMP and an 8-foot by 6-foot by 126-foot long RCB culvert. The new RCB will follow the original alignment, grade, and elevation of the existing CMP and will be constructed to conform where the existing CMP ends. The debris rack at the inlet of the RCB will remain in place but will be lengthened and modified to improve functionality. The inlet of the RCB will remain in place and Rock Slope Protection (RSP) will be placed on the north and south slopes of the creek near the inlet to repair damaged slopes. A headwall with deflector will be constructed at the outlet to direct the flow from the culvert to the river. The project is expected to have a beneficial effect on fish species by allowing fish to pass to the upper reaches of Anderson Creek.

Humboldt