Lost Lake East
Lost Lake East 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 East
The primary purpose of Lost Lake East 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 15 feet tall and stretches 240 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 230 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 | 38.64610, -119.94750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 240 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 230 acre-ft |
| Max Storage | 230 acre-ft |
| Surface Area | 20 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 | CA00632 |
| Federal ID | CA00632 |
| More Info | State Dam Safety Program |