Evans Dam Reservoir Report
Nearby: Ebeline Lake Dam Evans Lake Dam
Last Updated: December 11, 2025
Evans Dam, located in Fairmont, Missouri, on the TR-Little Wyaconda River, is a privately owned earth dam primarily used for grade stabilization.
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Summary
Completed in 1994, the dam stands at a height of 32 feet and has a hydraulic height of 31 feet. With a storage capacity of 28 acre-feet and a drainage area of 377.6 square miles, Evans Dam plays a crucial role in controlling water flow and preventing erosion in the area.
Despite being privately owned, Evans Dam is not regulated or inspected by the state, with a low hazard potential and a moderate risk assessment rating of 3. The dam features an uncontrolled spillway type with a width of 10 feet, and no outlet gates. While its condition assessment is currently not rated, the dam serves as a vital infrastructure for managing water resources in the region. With its stone core and soil foundation, the dam continues to provide essential grade stabilization benefits to the surrounding community.
Evans Dam's strategic location and design make it a key asset for water resource and climate enthusiasts in Clark County, Missouri. Its construction has significantly contributed to the management of water flow and erosion control in the area, showcasing the importance of private infrastructure in environmental conservation efforts. As a low-hazard structure with a moderate risk assessment, Evans Dam stands as a testament to effective water management practices and the vital role of privately owned dams in protecting and preserving our natural resources.
Year Completed |
1994 |
Dam Length |
198 |
Dam Height |
32 |
River Or Stream |
TR-LITTLE WYACONDA RIVER |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
31 |
Drainage Area |
377.6 |
Nid Storage |
28 |
Structural Height |
34 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Fox River At Wayland
|
8cfs |
Des Moines River At St. Francisville
|
1620cfs |
Wyaconda River Above Canton
|
13cfs |
Des Moines River At Keosauqua
|
1800cfs |
Bear Creek Near Marcelline
|
5cfs |
South Fabius River Near Taylor
|
12cfs |
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.
Evans Dam