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.
California Coastal Commission (CCC)California Department of Fish and Wildlife, South Coast Region 5 (CDFW)California Department of Parks and RecreationCalifornia Department of Transportation, District 7 (DOT)California Highway PatrolCalifornia Native American Heritage Commission (NAHC)California Regional Water Quality Control Board, Los Angeles Region 4 (RWQCB)Caltrans, Division of AeronauticsDepartment of Toxic Substances ControlDepartment of Water ResourcesOffice of Historic PreservationResources Agency
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