Nance Dam Reservoir Report
Last Updated: December 6, 2025
Nance Dam, located in DeKalb, Missouri, is a privately owned structure primarily serving as a Fish and Wildlife Pond.
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Summary
Completed in 1968, this Earth dam stands at a height of 26 feet and stretches 500 feet in length, providing a storage capacity of 135 acre-feet. With a normal storage level of 85 acre-feet, the dam covers a surface area of 9 acres and drains an area of 273 acres from the TR-GRINDSTONE CREEK.
Despite being categorized as having a low hazard potential, Nance Dam is considered to have moderate risk, with a risk assessment rating of 3. While the dam is currently in a condition not rated, it is important to note that no state regulatory agency oversees its operation, inspection, or enforcement. Additionally, there is no Emergency Action Plan (EAP) in place for the dam, highlighting the need for proactive risk management measures to ensure the safety and integrity of the structure for the surrounding community and environment.
With its picturesque location and important role in providing habitat for fish and wildlife, Nance Dam is a notable feature in the region. However, the lack of state oversight, condition assessment, and emergency preparedness underscore the importance of continued monitoring and maintenance to mitigate potential risks and safeguard the water resources and surrounding ecosystems that depend on the dam.
Year Completed |
1968 |
Dam Length |
500 |
Dam Height |
26 |
River Or Stream |
TR-GRINDSTONE CREEK |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
26 |
Drainage Area |
273 |
Nid Storage |
135 |
Structural Height |
26 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
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.
Nance Dam