Cummings Reservoir No. 1
Cummings Reservoir No. 1 is an earth dam located in Modoc County, California, built in 1912. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Cummings Reservoir No. 1
The primary purpose of Cummings Reservoir No. 1 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 Likely Land & Livestock Co., Inc. (private). It impounds the Wfk Rock Creek.
The dam stands 11 feet tall and stretches 1,300 feet across, creates a reservoir covering 80 acres, has a maximum storage capacity of 400 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1912, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 06/25/2024.
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Location
| State | California |
| County | Modoc |
| River/Stream | Wfk Rock Creek |
| Coordinates | 41.51370, -120.64900 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 1,300 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 400 acre-ft |
| Max Storage | 400 acre-ft |
| Surface Area | 80 acres |
| Drainage Area | 6 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Likely Land & Livestock Co., Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/25/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00479 |
| Federal ID | CA00479 |
| More Info | State Dam Safety Program |