Williams Valley
Williams Valley is an earth dam located in Mendocino County, California, built in 1965. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Williams Valley
The primary purpose of Williams Valley 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 Roger A. And Michelle M. Burch (private). It impounds the Tr Short Creek.
The dam stands 47 feet tall and stretches 243 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 200 acre-feet, and collects water from a drainage area of 1 square miles. 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 06/24/2025.
At 47 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | California |
| County | Mendocino |
| River/Stream | Tr Short Creek |
| Coordinates | 39.83720, -123.18440 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 47 ft |
| Dam Height | 47 ft |
| Dam Length | 243 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 200 acre-ft |
| Max Storage | 200 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Roger A. and Michelle M. Burch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/24/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00973 |
| Federal ID | CA00973 |
| More Info | State Dam Safety Program |