Westminster East Garden Grove Study

3 Documents in Project


SCH Number
Lead Agency
United States Army, Army Corps of Engineers (USACE)
Document Title
Westminster East Garden Grove Study
Document Type
OTH - Other Document
Present Land Use
The Bolsa Chica Channel [(BCC) (CO2)], with Westminster Channel (CO4) as a principal tributary, drains to Huntington Harbour. The BCC drains the western portion of the study area, with a significant portion of property adjacent to the Seal Beach Naval Weapons Station and the Los Alamitos Armed Forces Training Base. Aside from the military facilities, this portion of the watershed is almost entirely urbanized. Agriculture is still practiced under leases granted by the Navy on portions of their property. The BCC Channel outlets into Huntington Harbour, but unlike EGGW, does not outlet into Outer Bolsa Bay. The sole ocean outlet for both Outer Bolsa Bay and Huntington Harbour is to the north at Anaheim Bay and the Seal Beach National Wildlife Refuge. Tidal influence in the lowermost portion of the BCC and East Garden Grove-Wintersburg Channels extends approximately 2 miles inland.
Document Description
Note: Scoping Notice, Review per lead The purpose of this study is to evaluate residual flood risk within a portion of the Westminster watershed. The study area includes select non-Federal drainage channels within the watershed and the receiving waters of one of the channel systems within the Bolsa Chica Ecological Reserve area. Alternatives for analysis will look at reducing flood hazards and reducing flood impacts in the vicinity of Outer Bolsa Bay, including flooding along the Pacific Coast Highway. There are two main channel systems that collect runoff from portions of urbanized areas in the cities of Anaheim, Stanton, Cypress, Buena Park, Orange, Santa Ana, Garden Grove, Westminster, Fountain Valley, Los Alamitos, Seal Beach, and Huntington Beach. The East Garden Grove-Wintersburg channel [(EGGW) (CO5)], with its principal tributary, the Ocean View Channel [(OV) (CO6)], drains into Outer Bolsa Bay which drains into Huntington Harbour. One retarding basin (Haster) exists at the upstream reach of the EGGW channel. Outer Bolsa Bay is a portion of the Bolsa Bay State Marine Conservation Area (Bolsa Bay SMCA). The East Garden Grove-Wintersburg Channel is adjacent to the Bolsa Chica Basin SMCA which includes the Bolsa Chica Lowlands and Ecological Reserve, and is a major environmental resource in southern California. The Bolsa Bay SMCA's have been designated as an area of national significance; these wetlands host a wide assemblage of resident and migratory waterfowl and marine species, including over 30 state and federally listed sensitive species.

Contact Information

Shawna Herleth-King
Agency Name
U.S. Army Corps of Engineers
Contact Types
Lead/Public Agency


Anaheim, Anaheim, Stanton, Cypress, Buena Park, Orange, Santa Ana, ..., Buena Park, Cypress, Fountain Valley, Garden Grove, Huntington Beach, Los Alamitos, Orange, Santa Ana, Seal Beach, Stanton, Westminster
Cross Streets
Various; Seal Beach Naval Weapons Station, Los Alamitos Armed Forces Training Base
Total Acres
State Highways
Pacific Coast Hwy
CO5, CO6, CO2, CO4, Bolsa Bay, Outer Bolsa Bay

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
Cal Fire, California Air Resources Board (ARB), California Coastal Commission (CCC), California Department of Conservation (DOC), California Department of Parks and Recreation, California Department of Transportation, District 12 (DOT), California Highway Patrol, California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), Department of Fish and Wildlife, Marine Region, Department of Toxic Substances Control, Department of Water Resources, Office of Emergency Services, California, Office of Historic Preservation, Resources Agency, San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy (RMC), State Water Resources Control Board, Division of Drinking Water, California Native American Heritage Commission (NAHC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California State Lands Commission (SLC)
State Reviewing Agency Comments
California Native American Heritage Commission (NAHC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California State Lands Commission (SLC)
Development Types
Other (Flood Risk Management Study)
Local Actions
FRM study
Project Issues
Agriculture and Forestry Resources, Biological Resources

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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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