Three Mile Creek Watershed Site 65 Reservoir Report
Last Updated: December 12, 2025
Three Mile Creek Watershed Site 65 is a vital water resource in Iowa, owned and regulated by the local government with oversight from the Iowa DNR.
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Summary
This site, designed by USDA NRCS, serves multiple purposes including fire protection, stock management, and small fish pond usage. The earth dam, completed in 1968, stands at a height of 30 feet and has a storage capacity of 72 acre-feet, providing flood risk reduction for the surrounding area.
Located in Adair County, Iowa, Three Mile Creek Watershed Site 65 plays a crucial role in managing water resources in the region. With a low hazard potential and a moderate risk assessment rating, this site is not only a key element in the local ecosystem but also a valuable asset for the community. Despite being uncontrolled, the spillway type of this dam ensures that excess water can be safely discharged when necessary, contributing to the overall safety and efficiency of the structure.
This site, with its earth dam and soil foundation, highlights the importance of proper water management practices in maintaining a sustainable environment. As climate change continues to impact water resources, the role of structures like Three Mile Creek Watershed Site 65 becomes increasingly significant in protecting communities from potential hazards and ensuring the continued availability of water for various uses.
Year Completed |
1968 |
Dam Length |
517 |
Dam Height |
30 |
River Or Stream |
TR-THREE MILE CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Drainage Area |
0.18 |
Nid Storage |
72 |
Hazard Potential |
Low |
Foundations |
Soil |
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.
Three Mile Creek Watershed Site 65