Montezuma Pipeline/Mid-City Pipeline Phase 2 SDP (PTS No. 406277)

Montezuma Pipeline/Mid-City Pipeline Phase 2 SDP (PTS No. 406277)

A Site Development Permit for the installation of approx. 1.16 miles of new water pipelines which consists of 5,680 linear feet of new 66" diameter Cement Lined and Coated Steel transmission main and 422 LF of 8-inch PVC distribution main. The 66-inch transmission main will urn from the Alvarado Water Treatment Plant (AWTP), located at the intersections of Lake Murray Blvd. and Kiowa Dr., to the intersection of 68th and El Cajon Blvd. The northern terminus of the pipeline will be connected to Existing Valve Vault No. 3 located where the Earl Thomas Reservoir Outlet Pipeline intersects the Clear Wells Interconnect Pipeline at the AWTP. The south terminus will be connected to the Mid-City Pipeline Phase 1 project water lines which start on el Cajon Blvd. between 68th and 69th Streets. The project also includes replacement of a remote control panel and antenna mast for the Murray 2nd Pipeline, as well as installation of insert flow meters for the Murray 2nd Pipeline and the Mid-City Pipeline. The majority of the project alignment will be constructed using open trenching. The pipeline will be tunneled and no trenching will be required at three locations: 1) crossing I-8; 2) under the San Diego County Water Authority 108-inch main on Lake Murray Blvd.; and 3) under the San Diego Water Authority 48-inch main on El Cajon Blvd. For the I-8 crossing, the tunnel launching pit will be located in the Denny's parking lot at 6970 Alvarado Road on the south side of I-8, and the receiving pit will be on the north side of I-8 in the City of La Mesa within the Lake Murray Blvd. public right of way. Both tunneling pits will be sited in existing development areas that do not contain sensitive biological resources. There will be excavations in unpaved areas at the connection with Valve Vault No. 3 at the AWTP and at the Murray 2nd Pipeline. Existing Valve Vault No. 3 is on the City owned land adjacent to Lake Murray Blvd. The excavation for the Murray 21nd Pipeline is partially within a Multiple Habitat Preservation Area. It is on City owned property near the Del Cero Baptist Church at the intersection of Pennsylvania Lane and Delaware Ave. Related work will include traffic control, best management practices for erosion control and storm drain inlet protection, ADA curb ramp installation, pipe abandonment, and resurfacing and restoration of disturbed areas to their original condition. Existing below grade water line will be abandoned along portions of Mohawk Street, 72nd Street, and a public alley north of Mohawk Street.

La Mesa, San Diego

San Diego

California Air Resources Board (ARB), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 11 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, San Diego Region 9 (RWQCB), California State Lands Commission (SLC), Department of Water Resources, Resources Agency, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Divison of Financial Assistance

Other (Water pipeline installation & replacement)

Site Plan

Biological Resources, Cultural Resources, Hazards & Hazardous Materials, Land Use/Planning