Langtry
Langtry is an earth dam located in Lake County, California, built in 1992. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Langtry
The primary purpose of Langtry 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 Langtry Farms, Llc (private). It impounds the Tr Cassidy Creek.
The dam stands 50 feet tall and stretches 450 feet across, creates a reservoir covering 34 acres, has a maximum storage capacity of 525 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1992, the structure is 34 years 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 10/13/2025.
At 50 feet, this dam is taller than 93% of dams nationwide.
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Location
| State | California |
| County | Lake |
| River/Stream | Tr Cassidy Creek |
| Coordinates | 38.71530, -122.53280 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 450 ft |
| Year Completed | 1992 (34 years old) |
Storage & Hydraulics
| NID Storage | 525 acre-ft |
| Max Storage | 525 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Langtry Farms, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/13/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA01350 |
| Federal ID | CA01350 |
| More Info | State Dam Safety Program |