Drinkwater
Drinkwater is an earth dam located in Los Angeles County, California, built in 1923. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Drinkwater
Drinkwater is a dam in Los Angeles, California. The dam is owned by City Of Los Angeles Department Of Water And Power (local government). It impounds the Offstream.
The dam stands 105 feet tall and stretches 448 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 92 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1923, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 11/19/2025.
At 105 feet, this dam is taller than 98% of all dams in the United States.
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Location
| State | California |
| County | Los Angeles |
| River/Stream | Offstream |
| Coordinates | 34.53020, -118.52340 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 105 ft |
| Dam Height | 105 ft |
| Dam Length | 448 ft |
| Year Completed | 1923 (103 years old) |
Storage & Hydraulics
| NID Storage | 92 acre-ft |
| Max Storage | 92 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | City of Los Angeles Department of Water and Power |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/19/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00077 |
| Federal ID | CA00077 |
| More Info | State Dam Safety Program |