Regional Water Quality Control Board, Region 1 (North Coast), Santa Rosa
Mendocino County DPW - Hearst Willits Road
NOE - Notice of Exemption
The primary purpose of the Project is to replace two failing culverts with one concrete box culvert and stabilize the banks at the inlet and outlet. The proposed Project would include replacing two existing 48" x 45' perched culverts with one 10' x 6' x 45' concrete box culvert. The new culvert will be countersunk two feet below stream grade and backfilled with existing native streamed material. The new culvert will widen and enhance channel capacity and function. Cast-in-place wing walls will be constructed at the upstream and downstream ends of the new box culvert.
Replacement of failing culverts at the same site and will have substantially the same purpose and capacity, with no expansion of use.
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