The proposed project would connect the First Los Angeles Aqueduct (LAA1) (concrete conduit) and Second Los Angeles Aqueduct (LAA2) (riveted steel pipeline) through installation of approximately 183 feet of 60-inch diameter pipe. The material to be used for the pipe is still to be determined. The LAA Crossover Project includes:
• The installation of an isolation structure on the LAA1 downstream of the LAA Crossover connection. This structure will include two sets of slide gates and reinforcement of the LAA1 required for installation of the slide gates.
• The installation of two 60-inch diameter butterfly valves on the Crossover pipeline to prevent back flow into the LAA1 when the LAA2 is in service.
• Installation of a new crossover pipe below grade with a new mechanical platform constructed atop the replacement segment of the LAA1.
• Installation of a new connection structure to allow for the connection of the LAA Crossover pipeline to the LAA1 concrete channel.
• The installation of a LAA Crossover connection to LAA2 downstream of the LAA1-LAA2 intersection.
• Installation of a galvanic cathodic protection system for corrosion control.
California Air Resources Board (ARB), 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 Transportation, District 9 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Lahontan Victorville Region 6 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Office of Historic Preservation, Sierra Nevada Conservancy, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Divison of Financial Assistance
Water Facilities (Pipe Connection with Valve between Existing Aqueduct Facilities)(Type Pipe, MGD 225)
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation
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