Maine Prairie 3 is a buttress dam located in Solano County, California, built in 1965. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 11 ft11 ft tall and 120 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Maine Prairie 3
Maine Prairie 3 is a dam in Solano, California. The dam is owned by Maine Prairie Water District (public utility). It impounds the Ulatis Creek.
The dam stands 11 feet tall and stretches 120 feet across, creates a reservoir covering 23 acres, and has a maximum storage capacity of 96 acre-feet. Completed in 1965, the structure is well into its service life at over 50 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. The most recent inspection on record was 09/23/2025.
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Location
| State | California |
| County | Solano |
| River/Stream | Ulatis Creek |
| Coordinates | 38.32890, -121.81370 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 120 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 96 acre-ft |
| Max Storage | 96 acre-ft |
| Surface Area | 23 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Maine Prairie Water District |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/23/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00874 |
| Federal ID | CA00874 |
| More Info | State Dam Safety Program |