Waubonsie Cr. Watershed Site 36-1 Reservoir Report
Last Updated: December 5, 2025
Located in Mills, Iowa, Waubonsie Cr.
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Summary
Watershed Site 36-1 is a local government-owned structure designed by USDA NRCS with a primary purpose of fire protection, stock, or small fish pond, as well as flood risk reduction. Completed in 1983, this earth dam stands at a height of 45 feet with a length of 875 feet, offering a storage capacity of 310 acre-feet and serving a drainage area of 0.66 square miles along the TR- Waubonsie Cr. river or stream.
With a hazard potential rated as low and a risk assessment of moderate (3), Waubonsie Cr. Watershed Site 36-1 is regulated by the Iowa DNR, with state permitting, inspection, and enforcement in place. The dam's condition assessment is currently marked as not rated, with no designated emergency action plan or inundation maps prepared. Despite its low hazard potential, this structure plays a crucial role in mitigating flood risks and providing essential water resources for the surrounding area.
For water resource and climate enthusiasts, Waubonsie Cr. Watershed Site 36-1 offers a fascinating insight into local government efforts in water management and conservation. As part of the Omaha District, this structure showcases the collaboration between federal and state agencies in ensuring the safety and sustainability of water resources in Iowa. With its strategic location and purposeful design, this dam stands as a testament to the importance of proactive risk management and environmental stewardship in the face of changing climate patterns and water dynamics.
Year Completed |
1983 |
Dam Length |
875 |
Dam Height |
45 |
River Or Stream |
TR- WAUBONSIE CR. |
Primary Dam Type |
Earth |
Surface Area |
12.3 |
Drainage Area |
0.66 |
Nid Storage |
310 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
45 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Nishnabotna River At Randolph
|
512cfs |
Weeping Water Creek At Union
|
20cfs |
Missouri River At Nebraska City
|
24100cfs |
Missouri River At Omaha
|
18800cfs |
East Nishnabotna River At Red Oak
|
305cfs |
Nishnabotna River Above Hamburg
|
1190cfs |
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.
Waubonsie Cr. Watershed Site 36-1
US 34;US 275 Mills County