SCH Number 2022040286

Title: Swamp Rodent Culverts
Description: The California Department of Transportation (Caltrans) proposes to replace two culverts along a portion of SR 178 near Onyx. Existing 18” diameter corrugated metal culverts will be replaced with 24” diameter plastic (HDPE) culverts. The new culvert at PM 72.7 will be extended approximately 10 feet at the inlet and 3 feet at the outlet. The new culvert at PM 72.79 will be extended approximately 1 foot at the inlet and 2 feet at the outlet. Metal flared end sections (FES) will be installed at the inlets. The outlets will not have FES installed. Existing culverts will be used as a water diversion while the new culverts are being placed. The new culverts will be approximately 6 to 12 inches from the existing culverts. Excavated material will be placed over culverts on side slopes. New culverts will be covered by concrete slurry to within 4 to 6 inches of the roadway surface; the final coverage will be minor concrete.

2 documents in project

Type	Lead/Public Agency	Received	Title
NOD	California Department of Transportation, District 9 (DOT)	5/19/2022	Swamp Rodent Culverts
MND	California Department of Transportation, District 9 (DOT)	4/13/2022	Swamp Rodent Culverts