Simmons Lake Dam Reservoir Report
Last Updated: December 16, 2025
Simmons Lake Dam, located in Caldwell, Missouri, was completed in 1977 and serves primarily for flood risk reduction.
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Summary
This privately-owned dam stands at a height of 30 feet and has a storage capacity of 883 acre-feet, with a normal storage of 440 acre-feet. Situated on Tub Creek, this earth dam with a buttress core spans over 55 acres of surface area and protects a drainage area of 716 square miles. Despite its high hazard potential, the dam's condition assessment is currently listed as "Not Rated."
The dam does not fall under state jurisdiction or regulation, with no state permitting, inspection, or enforcement required. While it is not owned or funded by any federal agency, Simmons Lake Dam plays a critical role in managing flood risks in the area. Although the dam has not been assigned a Dam Safety Action Classification (DSAC) or undergone a risk assessment, it is crucial for the community to stay informed and prepared for any potential emergencies through an Emergency Action Plan (EAP), which is currently not rated or updated. With its key purposes of flood risk reduction, irrigation, and recreation, Simmons Lake Dam remains a vital infrastructure for the local environment and community.
Year Completed |
1977 |
Dam Height |
30 |
River Or Stream |
TUB CREEK |
Primary Dam Type |
Earth |
Surface Area |
55 |
Drainage Area |
716 |
Nid Storage |
883 |
Structural Height |
30 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
30 |
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.
Simmons Lake Dam