Ossum Wash Repair Project

Ossum Wash Repair Project

Victor Valley Wastewater Reclamation Authority (VVWRA) owns two existing gravity trunk sewer pipelines (36-in Reinforced Concrete Pipe [RCP] and 42-in Vitrified Clay Pipe [VCP]) that cross Ossum Wash. These large diameter sewer pipelines transport around 1-MG of the City of Victorville’s daily sewage. After recent heavy rain events, the existing grade above these pipelines has eroded substantially. VVWRA is concerned that future rain events might expose the two pipelines, making them susceptible to a pipe break and sewage spill from bedload or debris travelling down the wash during a rain event. The two existing pipelines are estimated to have approximately 4 feet of cover remaining above them. VVWRA is proposing to construct emergency improvements to the wash to mitigate the risk of pipe exposure and damage. To address the critical erosion issues within the wash described above, VVWRA hired Dudek to design emergency improvements to protect the sewer lines. The proposed improvements include the following: • Installing grouted riprap on the channel side slope along the easterly side of the existing grouted riprap channel. • Installing an extension of the grouted riprap channel from the downstream end of the existing grouted riprap to the northerly extent of the VVWRA pipeline easement. • Installing loose riprap lined channel downstream of the proposed grouted riprap.

Victorville

San Bernardino

Southern California

California Department of Conservation (DOC), California Department of Fish and Wildlife, Inland Deserts Region 6 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 8 (DOT), California Department of Transportation, Division of Aeronautics (DOT), California Department of Transportation, Division of Transportation Planning (DOT), California Department of Water Resources (DWR), California Fish and Game Commission (CDFGC), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Lahontan Victorville Region 6 (RWQCB), California State Lands Commission (SLC), Central Valley Flood Protection Board, Colorado River Board, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Drinking Water, District 13, State Water Resources Control Board, Division of Drinking Water, District 27, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Divison of Financial Assistance

Other (Wash Repair)

Site Plan

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Economics/Jobs, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire