Twin Lake Dam Reservoir Report
Last Updated: December 11, 2025
Twin Lake Dam in Mercer, Missouri, stands as a vital recreational resource with a primary purpose of offering leisure activities to visitors.
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Summary
Completed in 1981, this earth dam boasts a height of 51 feet and a length of 800 feet, providing storage capacity of 1087 acre-feet. The dam's spillway, with a width of 64 feet, helps regulate water flow, with a maximum discharge capacity of 2610 cubic feet per second.
Although Twin Lake Dam is inspected biennially and deemed to be in satisfactory condition as of December 2007, its hazard potential is classified as 'High'. Despite this, the risk assessment indicates a moderate level of risk, with no specific risk management measures outlined. With its location on TR Pops Branch and within close proximity to Princeton, the dam serves as a significant landmark within the area, offering both recreational opportunities and a vital water resource for the local community. The dam's valuation as a recreational site coupled with its regulatory oversight by the DAM AND RESERVOIR SAFETY PROG underscores its importance in maintaining safety and functionality in the face of potential hazards.
Year Completed |
1981 |
Dam Length |
800 |
Dam Height |
51 |
River Or Stream |
TR POPS BRANCH |
Surface Area |
52 |
Drainage Area |
600 |
Nid Storage |
1087 |
Structural Height |
52 |
Outlet Gates |
Valve |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
52 |
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.
Twin Lake Dam