Lost Lake West
Lost Lake West is an earth dam located in Alpine County, California, built in 1925. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Lost Lake West
The primary purpose of Lost Lake West 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 Carson Water Subconservancy District (public utility). It impounds the Lost Creek.
The dam stands 21 feet tall and stretches 200 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 140 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1925, 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 07/30/2025.
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Location
| State | California |
| County | Alpine |
| River/Stream | Lost Creek |
| Coordinates | 38.64880, -119.94790 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 200 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 140 acre-ft |
| Max Storage | 140 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Carson Water Subconservancy District |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/30/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00633 |
| Federal ID | CA00633 |
| More Info | State Dam Safety Program |