USMCA Mitigation of Contaminated Transboundary Flows Project


SCH Number
Lead Agency
United States Environmental Protection Agency (EPA)
Document Title
USMCA Mitigation of Contaminated Transboundary Flows Project
Document Type
EIS - Draft EIS
Present Land Use
Utility and Multi-Species Conservation Open Space land uses
Document Description
The U.S. Environmental Protection Agency (EPA) and International Boundary and Water Commission, U.S. Section (USIBWC), have prepared a Draft Programmatic Environmental Impact Statement (Draft PEIS) for the proposed United States–Mexico–Canada Agreement (USMCA) Mitigation of Contaminated Transboundary Flows Project (the Proposed Action). The Proposed Action involves the planning, design, and construction of infrastructure to reduce transboundary flows from Tijuana that routinely convey pollutants, sewage, and/or trash into the U.S. EPA and USIBWC have evaluated the Proposed Action, including alternatives, located in the Tijuana River area in southern San Diego County, California in the U.S. and in the Tijuana region in Mexico. EPA and USIBWC have identified in the Draft PEIS a No-Action Alternative and two alternatives for implementing the Proposed Action: Alternative 1 (Core Projects) and Alternative 2 (Core and Supplemental Projects). A preferred alternative has not been identified at this time. The Proposed Action is expected to have beneficial impacts to public safety and water quality in the Tijuana River watershed and adjacent coastal areas. The Proposed Action covers a large geographic area and would impact a broad range of resource areas.

Contact Information

Elizabeth Borowiec
Agency Name
United States Environmental Protection Agency (EPA)
Job Title
Water Division, Infrastructure Section (W-3-3)
Contact Types
Lead/Public Agency


San Diego
San Diego
Southern California
Cross Streets
Dairy Mart Road and West Tia Juana Street
Total Acres
approx. 354
Parcel #
7601076000, 6650400100, 6650104100, 6650104600, 6640110700, 6640105800, 6630105400...
State Highways
Naval Outlying Landing Field Imp
Willow Elementary, Sunset Elementary, Our Lady of Mt. Carmel...
Tijuana River

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Coastal Commission (CCC), California Department of Fish and Wildlife, Marin Region 7 (CDFW), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Resources Recycling and Recovery, California Department of State Parks, Division of Boating and Waterways, California Department of Transportation, District 11 (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 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, San Diego Region 9 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance
Development Types
Industrial (Sq. Ft. 535515, Acres 12.3, Employees 100), Waste Treatment:Sewer (Two wastewater treatment plants in U.S. (40-60 MGD, 35-60 MGD))(MGD 120)
Local Actions
review Draft PEIS
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Coastal Zone, Cultural Resources, Cumulative Effects, Drainage/Absorption, Economics/Jobs, Energy, Fiscal Impacts, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire, climate, odor, energy, public health and safety, environmental justice


Notice of Completion [NOC] Transmittal form

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