Coyote Flat
Coyote Flat is an earth dam located in Lassen County, California, built in 1928. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Coyote Flat
Coyote Flat is a dam in Lassen, California. The dam is owned by Nobmann Dixie Valley Ranch, Llc (private). It impounds the Coyote Creek.
The dam stands 52 feet tall and stretches 205 feet across, creates a reservoir covering 293 acres, has a maximum storage capacity of 5,250 acre-feet, and collects water from a drainage area of 30 square miles. Completed in 1928, the structure is well-established, with more than 75 years of service.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 09/24/2025.
At 52 feet, this dam is taller than 93% of dams nationwide.
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Location
| State | California |
| County | Lassen |
| River/Stream | Coyote Creek |
| Coordinates | 40.90950, -120.98700 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 52 ft |
| Dam Height | 52 ft |
| Dam Length | 205 ft |
| Year Completed | 1928 (98 years old) |
Storage & Hydraulics
| NID Storage | 5,250 acre-ft |
| Max Storage | 5,250 acre-ft |
| Surface Area | 293 acres |
| Drainage Area | 30 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Nobmann Dixie Valley Ranch, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/24/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00513 |
| Federal ID | CA00513 |
| More Info | State Dam Safety Program |