Lost Lake Dam Reservoir Report
Nearby: Wolk Lake Dam Langosch Lake Dam
Last Updated: December 19, 2025
Lost Lake Dam, located in St.
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Summary
Peters, Missouri, is a privately owned structure that serves as a recreational destination along TR Dardenne Creek. Built in 1961, this earth dam stands at a height of 37 feet and spans 865 feet in length, with a storage capacity of 265 acre-feet. Despite its moderate hazard potential, the dam is considered to be in satisfactory condition and is inspected every five years to ensure its safety.
Managed by the DAM AND RESERVOIR SAFETY PROGRAM in Missouri, Lost Lake Dam has a low hazard potential and is primarily used for recreational purposes. The dam features an uncontrolled spillway with a width of 45 feet, and has a maximum discharge capacity of 1100 cubic feet per second. With a surface area of 23 acres and a drainage area of 648 square miles, this dam plays a crucial role in water resource management in the region.
The dam's risk assessment is classified as moderate, with no emergency action plan in place as of the last assessment in 2007. Despite this, Lost Lake Dam continues to provide valuable recreational opportunities while ensuring the safety and security of the surrounding community. For water resource and climate enthusiasts, Lost Lake Dam represents a fascinating case study of how private ownership and state regulation intersect to manage and maintain critical infrastructure in a changing climate.
Year Completed |
1961 |
Dam Length |
865 |
Dam Height |
37 |
River Or Stream |
TR DARDENNE CREEK |
Surface Area |
23 |
Drainage Area |
648 |
Nid Storage |
265 |
Structural Height |
37 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
37 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Lost Lake Dam