San Ramon Canyon Storm Drain Tunnel Project

3 Documents in Project


SCH Number
Lead Agency
City of Rancho Palos Verdes
Document Title
San Ramon Canyon Storm Drain Tunnel Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Open Space. Surrounding land use: Residential
Document Description
The project includes a new mid-canyon storm drain inlet structure and tunnel alignment north of W. 25th Street, that would gravity flow through a tunnel to a cut and covered section of buried pipe located south of W. 25th Street, and transition into a second tunnel to a new outlet structure at the base of the bluff. Total new storm drain alignment is approximately 4,200 lineal feet. The existing LA City storm drain will remain in place and serve as backup. A dirt filled gravity-type buttress and associated terrace drains would be constructed within approximately 900 feet of the canyon to support the storm drain inlet structure and stabilize the Tarapaca Landslide. The landslide is currently undercutting the canyon wall.

Contact Information

Alan Braatvedt
Agency Name
City of Rancho Palos Verdes
Contact Types
Lead/Public Agency


Rancho Palos Verdes
Los Angeles
Cross Streets
West 25th Street at Palos Verdes Drive East
Pacific Ocean to the south

Notice of Completion

Review Period Start
Review Period End
Development Types
Other (Storm Drain)
Local Actions
Coastal Permit, Public Works
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Coastal Zone, Cultural Resources, Cumulative Effects, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Public Services, Recreation, Transportation, Vegetation, Wetland/Riparian, Wildfire, Storm Drain
Reviewing Agencies
California Coastal Commission (CCC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 7 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, Los Angeles Region 4 (RWQCB), Caltrans, Division of Aeronautics, Department of Toxic Substances Control, Department of Water Resources, Office of Historic Preservation, Resources Agency

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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