Lost Lake Dam Reservoir Report
Last Updated: December 19, 2025
Lost Lake Dam, located in Turner, Missouri, is a privately owned structure built in 1971 for fire protection, stock, and small fish pond purposes.
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Summary
Sitting on the TR to James River, this earth-type dam stands at a height of 35 feet with a structural height of 40 feet and a length of 400 feet, providing a storage capacity of 58 acre-feet. Despite its relatively small surface area of 5 acres, Lost Lake Dam plays a crucial role in regulating water flow in the region, with a maximum discharge capacity of 290 cubic feet per second.
Maintained and regulated by the DAM AND RESERVOIR SAFETY PROG of the state, Lost Lake Dam has a high hazard potential due to its location and design. Although its condition has not been rated, regular inspections are conducted to ensure its safety and integrity. The dam's emergency action plan was last revised in 2012, highlighting the importance of preparedness in case of unforeseen events. The risk assessment for Lost Lake Dam indicates a moderate level of risk, emphasizing the need for continued monitoring and management measures to mitigate potential hazards.
Lost Lake Dam stands as a vital structure in the water resource management system of Webster County, Missouri. With its primary purpose of providing essential services and its strategic location along the river, this dam serves as a key component in ensuring water availability for fire protection and agricultural needs in the area. As climate change continues to impact water resources, the maintenance and monitoring of dams like Lost Lake Dam become increasingly important in safeguarding both human and environmental wellbeing in the region.
Year Completed |
1971 |
Dam Length |
400 |
Dam Height |
35 |
River Or Stream |
TR TO JAMES RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
250 |
Nid Storage |
58 |
Structural Height |
40 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
40 |
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