Lost Lake Dam
Lost Lake Dam is an earth dam located in St. Charles County, Missouri, built in 1961. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Lost Lake Dam
The primary purpose of Lost Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is private-owned. It impounds the Tr Dardenne Creek near St Peters.
The dam stands 37 feet tall and stretches 865 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 265 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1961, the structure is well into its service life at over 50 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 04/07/2020.
At 37 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Missouri |
| County | St. Charles |
| Nearest City | St Peters |
| River/Stream | Tr Dardenne Creek |
| Coordinates | 38.72505, -90.89087 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 37 ft |
| Dam Height | 37 ft |
| Dam Length | 865 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 265 acre-ft |
| Max Storage | 265 acre-ft |
| Normal Storage | 235 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,100 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/07/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MO10492 |
| Federal ID | MO10492 |
| More Info | State Dam Safety Program |