Bollinger Canyon Road Culvert Repair Project

Bollinger Canyon Road Culvert Repair Project

The Town of Moraga proposes to repair and reconstruct two culverts located in the Las Trampas Creek watershed along Bollinger Canyon Rd, between Joseph Dr and St. Mary's Rd. The purpose is to maintain existing storm drain conveyance and to stabilize an area adjacent to a storm drain outfall that has severely eroded. A section of Pipe 1 in poor condition would be replaced to maintain conveyance of storm water flows through the culvert. At Pipe 2, the outfall and adjacent slope will be armored with rock riprap and slope protection to stabilize the eroded area near the outfall. The stabilization solution for Pipe 2 requires fill of approximately 15 to 20 cy to stabilize the slope and culvert outfall. Not all of this fill would extend below the Ordinary High Water Mark (OHWM); the project footprint below the OHWM is approximately 175 sf. The project will also require the removal of approximately 8 trees.

Moraga

Contra Costa

California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), California State Lands Commission (SLC), Department of Water Resources, Office of Emergency Services, California, Resources Agency

Other (storm drain culvert repair)

infrastructure

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Economics/Jobs, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire