Diamond Valley Lake Forebay is an earth dam located in Riverside County, California, built in 1999. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 22 ft22 ft tall and 4,482 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Diamond Valley Lake Forebay
Diamond Valley Lake Forebay is a dam in Riverside, California. The dam is owned by Metropolitan Water District of Southern California (public utility). It impounds the Domenigoni Val Can.
The dam stands 22 feet tall and stretches 4,482 feet across, creates a reservoir covering 31 acres, has a maximum storage capacity of 500 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1999, the structure is 27 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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 02/05/2025.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | California |
| County | Riverside |
| River/Stream | Domenigoni Val Can |
| Coordinates | 33.67600, -117.07040 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 4,482 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 500 acre-ft |
| Max Storage | 500 acre-ft |
| Surface Area | 31 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Metropolitan Water District of Southern California |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/05/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01413 |
| Federal ID | CA01413 |
| More Info | State Dam Safety Program |