Branham Flat
Branham Flat is an earth dam located in Lassen County, California, built in 1880. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Branham Flat
The primary purpose of Branham Flat 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 Mapes Ranch, Inc. (private). It impounds the Branham Creek.
The dam stands 20 feet tall and stretches 200 feet across, creates a reservoir covering 125 acres, has a maximum storage capacity of 1,200 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1880, 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 06/19/2024.
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Location
| State | California |
| County | Lassen |
| River/Stream | Branham Creek |
| Coordinates | 40.72890, -120.51460 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 200 ft |
| Year Completed | 1880 (146 years old) |
Storage & Hydraulics
| NID Storage | 1,200 acre-ft |
| Max Storage | 1,200 acre-ft |
| Surface Area | 125 acres |
| Drainage Area | 8 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Mapes Ranch, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/19/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00524 |
| Federal ID | CA00524 |
| More Info | State Dam Safety Program |