Western Trunk Line Project


SCH Number
Lead Agency
Los Angeles County
Document Title
Western Trunk Line Project
Document Type
MND - Mitigated Negative Declaration
Project Applicant
Los Angeles Department of Water and Power
Present Land Use
Commercial (C2-1, C2-1V, C2-1VL, and C2-2D); Low and Medium Densily Residential (R1-1, R2-1, R1 P-1); Open Space (OS-1XL); Light Manufacturing (M1-1 and M2-1); and Public Facility (PF-1).

Document Description
The Western Trunk Line Project would involve the replacement of a 23,300-foot portion of the Harbor Trunk Line within Western Avenue, from 59th Place to 121st Street. The proposed project would be located in the City of Los Angeles between 59th Place and 108th Street, and in unincorporated Los Angeles County between 108th Street and 121 st Street. In addition to the proposed trunk line replacement, the proposed project would also replace approximately 4,495 feet of 6-inch and 8-inch diameter water distribution mainline along Western Avenue. The water distribution mainline improvements would include the following: the replacement of 3,750 feet of existing 6-inch mainline with 12-inch line from 77th Street to Manchester Avenue; the replacement of 625 feet of existing 8-inch mainline with 12-inch line from 106th Street to 108th Street; and the installation of approximately 120 feet of 8-inch line to reconnect the existing 8-inch mainline on Western Avenue to the existing 8-inch line on Manchester Avenue. In order to maintain water pressures at specific intersections, the proposed project would also include minor improvements and the replacement of an existing regulator station, located at the intersection of Manchester Avenue and Western Avenue.

Contact Information
Christopher Lopez
Los Angeles Department of Water and Power
111 N. Hope Street, Room 1044
Los Angeles, CA 90012

Phone : (213) 367-3509


33°59'12.24"N 118°18'32.24"W
Los Angeles
Los Angeles
Cross Streets
W. Gage Street, W. Florence Street, W. Manchester Avenue, W. Century Blvd, Imperial Hwy and West
Total Acres
23,300 linear ft
State Highways
Interstate 110 and 105
Union Pacific Railway
Other Location Info
Section: See NOC for full details.

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (Type: Trunk Line Replacement)(Varies Daily MGD)
Local Action
Board Approval
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Forest Land/Fire Hazard Geologic/Seismic Minerals Noise Population/Housing Balance Public Services Recreation/Parks Schools/Universities Sewer Capacity Soil Erosion/Compaction/Grading Solid Waste Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Land Use Cumulative Effects
Reviewing Agencies
California Air Resources Board California Baldwin Hills Conservancy California Department of Conservation California Department of Fish and Wildlife, South Coast Region 5 California Department of Forestry and Fire Protection California Department of Parks and Recreation California Department of Water Resources California Highway Patrol California Native American Heritage Commission California Natural Resources Agency California Public Utilities Commission California Regional Water Quality Control Board, Los Angeles Region 4 Department of Toxic Substances Control Office of Historic Preservation San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy State Water Resources Control Board, Division of Water Quality California Department of Transportation, District 7


Environmental Document
1   PDF 30286 K 2   PDF 477697 K OPR Summary Form   PDF 747 K Western Trunk Line NOI   PDF 871 K
Western Trunk Line NOC   PDF 790 K
State Comments
2020019065_DOT7_Western Trunk Line project - 03143   PDF 362 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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