Horse Lake
Horse Lake is an earth dam located in Lassen County, California, built in 1912. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Horse Lake
The primary purpose of Horse Lake 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 Snow Storm Ranch (private). It impounds the Snowstorm Creek.
The dam stands 12 feet tall and stretches 1,200 feet across, creates a reservoir covering 34 acres, has a maximum storage capacity of 75 acre-feet, and collects water from a drainage area of 16 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 11/05/2025.
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Location
| State | California |
| County | Lassen |
| River/Stream | Snowstorm Creek |
| Coordinates | 40.68060, -120.38910 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 75 acre-ft |
| Max Storage | 75 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 16 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Snow Storm Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/05/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00521 |
| Federal ID | CA00521 |
| More Info | State Dam Safety Program |