Flood control channel/Public Right-of-Way/Linear Park
The proposed project would include:
Removal of the existing culvert inlet, the open, lined channel between the inlet and 9th Street, and the 9th Street bridge;
Construction of a new culvert approximately 440 feet long extending from the confluence with Reservoir Canyon Drain to the upstream (east) side of the 9th Street bridge. The new box culvert would be 7.7 feet wide by 7.7-feet high for a 400-foot length from the confluence with Reservoir Canyon Drain to 40 feet downstream (west) of the 9th Street bridge. A 50-foot long transition from a 7.7-foot wide by 7.7 foot high box culvert to a 14-foot wide by 7.7-foot high box culvert would extend the culvert under the 9th Street bridge. A 45-foot open channel concrete apron would be constructed as a new inlet for the culvert, upstream (east) of the 9th Street bridge. This would be an open channel, with vertical walls at the bridge transitioning to a trapezoidal channel; construction of a concrete apron extending 45 feet upstream (east) of the 9th Street bridge; and construction of a new, free-span bridge at 9th Street.
Aesthetics, Air Quality, Cultural Resources, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Public Services, Transportation, Wetland/Riparian, Wildlife
California Department of Conservation (DOC), California Department of Parks and Recreation, California Department of Transportation, District 8 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California State Lands Commission (SLC), Department of Fish and Wildlife, Region 6, Department of Water Resources, Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Division of Water Quality, California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB)
Reviewing Agency Comments
California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB)
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