Resize or Replace Culverts

Resize or Replace Culverts

The California Department of Transportation proposes to resize or replace, and/or extend 21 culverts on SR 36 East of Westwood in Lassen County. The purpose of the project is to enhance motorist safety and increase maintenance efficiency. At 10 of the 21 locations, the culverts will be extended to the Clear Recovery Zone (CRZ) limits. The remaining culverts will require flared end section treatments. There are 6 culverts to be replaced as they were determined to be in poor condition and three 12-inch diameter culverts will be replaced with 24 inch culverts to meet current maintenance standards. Five box culverts will be replaced with equivalent sized arch pipes. Unimproved 8-foot shoulders will be constructed to a length of 30 feet on either side of the culverts and fill slopes will extend to the inlets and outlets. Cinders, brush and other debris will be cleaned out of the existing ditches as necessary to improve drainage. The project area covers 5.95 acres at the 21 culverts and three staging areas. A total of 1.51 acres will be directly and permanently impacted with cut and fill. The remaining 4.44 acres may experience temporary disturbance activity that will be caused by equipment movement and similar disruption while accessing the cut and fill, widening over the replaced culverts, and accessing culverts and ditches to be cleared. Natural vegetation in the project vicinity includes wetland meadows Sheldon's sedge, native grasses.

Lassen