PLU: Stormwater Sump 154 and Outfall Structure
Z: Single Family (R-1)
GP: Parks & Recreation
The Sump of 154 Low-Flow Outlet Replacement Project consists of excavating to a depth of 3 ft to remove the existing buried 135 ft long 12 inch diameter low-flow outlet pipe and replace it with a new 12 inch diameter, high-density polyethylene (HDPE) pipe on the same general alignment. All HDPE joints would be fusion welded to provide a monolithic, non-corrodible pipe. A new flapgate would be installed on the discharge end of the low-flow outlet pipe. The Project also includes installation of a 6 inch diameter polyvinyl chloride (PVC) side drain to connect the large flip bucket with the low-flow outlet strucure. The purpose of the side drain is to facilitate circulation of standing water in the large flip bucket, and thus reduce mosquito breeding. The 6 inch side drain would be installed between the western wall of the conscrete flip bucket discharge structure and the headwall of the low-flow discharge structure. No work will occur within the existing Rock Slope Protection (RSP) adjacent to the discharge structures, and now new RSP will be added.
Residential (Units 1000), Other (stormwater outfall replacement)
Cultural Resources, Geology/Soils, Wetland/Riparian, Wildlife
California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 3 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), Department of Water Resources, Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Divison of Financial Assistance, Central Valley Flood Protection Board
Reviewing Agency Comments
Central Valley Flood Protection Board
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