A And C
A And C is an earth dam located in Modoc County, California, built in 1923. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About A And C
The primary purpose of A And C 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 Carey Ranches (private). It impounds the Sfk Will Creek.
The dam stands 13 feet tall and stretches 1,200 feet across, creates a reservoir covering 210 acres, has a maximum storage capacity of 800 acre-feet, and collects water from a drainage area of 120 square miles. Completed in 1923, the structure is over a century 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 05/28/2025.
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Location
| State | California |
| County | Modoc |
| River/Stream | Sfk Will Creek |
| Coordinates | 41.78050, -120.79810 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1923 (103 years old) |
Storage & Hydraulics
| NID Storage | 800 acre-ft |
| Max Storage | 800 acre-ft |
| Surface Area | 210 acres |
| Drainage Area | 120 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Carey Ranches |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/28/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00915 |
| Federal ID | CA00915 |
| More Info | State Dam Safety Program |