Big Dobe South
Big Dobe South is an earth dam located in Modoc County, California, built in 1912. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Big Dobe South
The primary purpose of Big Dobe South 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 Ronald Schluter (private). It impounds the Tr Rattlesnake Cr.
The dam stands 11 feet tall and stretches 2,640 feet across, creates a reservoir covering 800 acres, has a maximum storage capacity of 3,860 acre-feet, and collects water from a drainage area of 28 square miles. Completed in 1912, 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 | Tr Rattlesnake Cr |
| Coordinates | 41.62480, -120.56560 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 2,640 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 3,860 acre-ft |
| Max Storage | 3,860 acre-ft |
| Surface Area | 800 acres |
| Drainage Area | 28 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Ronald Schluter |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/28/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00468 |
| Federal ID | CA00468 |
| More Info | State Dam Safety Program |