Clinton Dam Reservoir Report
Nearby: Creti Dam Yellowsmoke Park Dam
Last Updated: December 14, 2025
Clinton Dam in Denison, Iowa, is a privately owned structure designed by NRCS with a primary purpose of flood risk reduction.
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Summary
Completed in 2008, this earth dam stands at a height of 22 feet and spans 552 feet in length, providing a storage capacity of 82 acre-feet. Situated on the Trib East Boyer River, the dam serves to mitigate flooding in the area, with a hazard potential rated as low and a moderate risk assessment.
Managed by the Iowa Department of Natural Resources, Clinton Dam is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and functionality. While the dam currently holds a condition assessment of "Not Rated" and lacks detailed emergency action plans, it plays a crucial role in protecting the surrounding Crawford County community from potential flood events. Water resource and climate enthusiasts can appreciate the vital role that Clinton Dam plays in managing water flow and reducing flood risks in the region.
Year Completed |
2008 |
Dam Length |
552 |
Dam Height |
22 |
River Or Stream |
Trib East Boyer River |
Primary Dam Type |
Earth |
Surface Area |
5.6 |
Drainage Area |
0.43 |
Nid Storage |
82 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
North Raccoon River Near Sac City
|
312cfs |
Little Sioux River Near Turin
|
1040cfs |
Soldier River At Pisgah
|
112cfs |
Boyer River At Logan
|
417cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
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.
Clinton Dam