Environmental Addendum/Reevaluation/Revalidation

4 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 7 (DOT)
Document Title
Environmental Addendum/Reevaluation/Revalidation
Document Type
ADM - Addendum
Present Land Use
Public Highway/Infrastructure (Bridge Complex)
Document Description
Environmental Addendum/Reevaluation/Revalidation for minor change in design/scope of work (final design of temporary river diversion to be implemented during construction) and environmental reevaluation limited to the topic of biological resources.Temporary diversion of flow of the San Gabriel River is required to construct the improvements associated with the proposed undertaking. Since the last environmental evaluation, it has been determined that the duration of construction is estimated at 1 year, and that work will be restricted to the dry season, with construction planned from April 15 to October 15. To assure that the proposed undertaking does not reduce the current channel design conveyance capacity or introduce potentially unstable flow conditions during construction, maintenance of 33% of channel design flow [19,800 cubic feet per second (CFS)] will be required from April-May and for the period of September-October. For the summer period (June-August), maintenance of 5% channel design flow (3,000 cfs) is required during temporary river diversion.

Contact Information

Eduardo Aguilar
Agency Name
Caltrans District 7 - Division of Environmental Planning, Los Angeles/Ventura
Job Title
Senior Environmental Planner/Branch Chief
Contact Types
Lead/Public Agency


Long Beach, Los Alamitos, Seal Beach
Los Angeles, Orange
Citywide, Countywide, Nationwide, Southern California, Statewide, Unincorporated
Cross Streets
Interstate 405/Interstate 605 Interchange
Total Acres
Parcel #
State Highways
405, 605, 22, 1
Tincher Prep, Jack L. Weaver, Francis Hopkinson
San Gabriel River

Notice of Completion

State Reviewing Agencies
California Air Resources Board (ARB), California Coastal Commission (CCC), California Department of Conservation (DOC), California Department of Fish and Wildlife, Marin Region 7 (CDFW), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of State Parks, Division of Boating and Waterways, California Department of Transportation, District 7 (DOT), California Department of Transportation, Division of Aeronautics (DOT), California Department of Transportation, Division of Transportation Planning (DOT), California Department of Water Resources (DWR), California Energy Commission, California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Los Angeles Region 4 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Office of Historic Preservation, San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy (RMC), State Water Resources Control Board, Division of Water Quality
Development Types
Transportation:Highway/Freeway (Maintenance, Bridge Scour Mitigation)
Local Actions
Use Permit
Project Issues
Biological Resources, Cultural Resources, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Noise, Recreation, Utilities/Service Systems, Vegetation, Wetland/Riparian


Final Document(s) [Approved_Certified draft environmental documents]

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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