Inundation Maps
Pursuant to Section 6161 of the California Water Code, inundation maps that include flood wave arrival time, maximum depth, deflood time, and usually peak velocity for dams and their appurtenant structures have been approved by the Division of Safety of Dams. The following approved maps include the flood wave arrival time, maximum depth, and, when included, peak velocity. Additional dam inundation maps with flood wave arrival time, maximum depth, and, when included, peak velocity will be publicly available once approved by DSOD.
Inundation map specific Frequently Asked Questions can be found at the General FAQs page.
| Dam Name | Dam Number | Reservoir Name | County | Inundation Map |
| Oroville | 1-48 | Lake Oroville | Butte | |
| Castaic | 1-58 | Castaic Lake | Los Angeles | |
| Pyramid | 1-66 | Pyramid Lake | Los Angeles | |
| Antioch Res | 3 | Antioch Municipal | Contra Costa | |
| San Vicente | 8-9 | San Vicente | San Diego | |
| O'Shaughnessy | 9-5 | Hetch Hetchy | Tuolumne | |
| Newell | 23-2 | Loch Lomond | Santa Cruz | |
| Alpine | 33-0 | Alpine Lake | Marin | |
| Palos Verdes | 35-4 | Palos Verdes | Los Angeles | |
| Diemer Reservoir | 35-10 | Diemer Reservoir | Orange | |
| Diemer Ozone Contact Basin | 35-22 | Diemer Ozone | Orange | |
| Red Mountain Reservoir | 37 | Red Mountain | San Diego | |
| Chet Harritt | 56-9 | Lake Jennings | San Diego | |
| McSwain | 58-4 | Lake McSwain | Mariposa | |
| Seven Oaks | 87-16 | Seven Oaks | San Bernardino | |
| Higuera | 629 | Higuera | Santa Clara | |
| Lake Wohlford | 834-0 | Lake Wohlford | San Diego | |
| Railroad Canyon | 818-0 | Canyon Lake | Riverside | |
| San Antonio | 1008-2 | Lake San Antonio | Monterey | |
| Los Vaqueros | 1019-3 | Los Vaqueros | Contra Costa | |
| Palisades Reservoir | 1022-2 | Palisades | Orange | |
| Hinkle | 1031-2 | Hinkle | Placer | |
| Walnut Canyon | 1037-0 | Walnut Canyon | Orange | |
| Box Canyon | 1056 | Lake Siskiyou | Siskiyou | |
| Vail | 2028 | Vail Lake | Riverside | |
| Crystal Lake | 2465 | Crystal Lake | El Dorado |
Materials:
Flow Chart: Owner process to make inundation maps
Flow Chart: DSOD and Cal OES Review
Emergency Regulations
Water code: Inundation Maps and Emergency Planning
Dam Owner: Emergency Intervention Toolbox
Federal Guidelines for Inundation Mapping
ASDSO brochure: Dam Owner Responsibility and Liability
ASDSO brochure: Procuring the Services of a Professional Engineer
ASDSO brochure: Emergency Action Planning
Cal OES: Dam Safety Emergency Planning
Related Pages
- Lake Perris Trail Opens as Reservoir Nears Full Capacity
- California Department of Water Resources Division of Safety of Dams Updates Information on California Dams
- March 21 Lake Oroville Spillways Construction Update
- Lake Oroville Construction Updates April 18
- Retrofits to Perris Dam Reduces Seismic Risk
Contact Us
General Information
Phone: (916) 227-4644 Email: damsafety@water.ca.gov
View additional information on the DSOD contact sheet.
Mailing Address:
Division of Safety of Dams
P.O. Box 942836
Sacramento, CA 94236-0001
Street Address:
Division of Safety of Dams
2200 X Street, Suite 200
Sacramento, CA 95818