Carpenter Wilson
Carpenter Wilson is an earth dam located in Modoc County, California, built in 1948. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Carpenter Wilson
Carpenter Wilson is a dam in Modoc, California. The dam is owned by Ronald And Sydne Lagrande (private). It impounds the Cooley Gulch.
The dam stands 21 feet tall and stretches 985 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 93 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1948, the structure is well-established, with more than 75 years of service.
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 04/22/2025.
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Location
| State | California |
| County | Modoc |
| River/Stream | Cooley Gulch |
| Coordinates | 41.42160, -120.87330 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 985 ft |
| Year Completed | 1948 (78 years old) |
Storage & Hydraulics
| NID Storage | 93 acre-ft |
| Max Storage | 93 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Ronald and Sydne LaGrande |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/22/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00491 |
| Federal ID | CA00491 |
| More Info | State Dam Safety Program |