Mokelumne Hill
Mokelumne Hill is an earth dam located in Calaveras County, California, built in 1973. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Mokelumne Hill
The primary purpose of Mokelumne Hill is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Mokelumne Hill Sanitary District (public utility). It impounds the Tr Mokelumne Rv.
The dam stands 52 feet tall and stretches 490 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 52 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1973, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 04/08/2025.
At 52 feet, this dam is taller than 93% of dams nationwide.
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Location
| State | California |
| County | Calaveras |
| River/Stream | Tr Mokelumne Rv |
| Coordinates | 38.30530, -120.71600 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 52 ft |
| Dam Height | 52 ft |
| Dam Length | 490 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 52 acre-ft |
| Max Storage | 52 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Mokelumne Hill Sanitary District |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/08/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01111 |
| Federal ID | CA01111 |
| More Info | State Dam Safety Program |