Waubonsie Cr. Watershed Site 9-1 Reservoir Report
Last Updated: December 13, 2025
Waubonsie Creek Watershed Site 9-1, located in Mills County, Iowa, is a critical water resource managed by the local government with oversight from the Iowa Department of Natural Resources.
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Summary
This site, designed by the USDA NRCS and completed in 1976, serves multiple purposes including flood risk reduction, recreation, and other water management activities. The earth dam at the site stands at a height of 47 feet and has a storage capacity of 639 acre-feet, providing essential water storage for the surrounding area.
With a low hazard potential and a moderate risk assessment rating, Waubonsie Creek Watershed Site 9-1 plays a crucial role in managing water resources in the region. The site has not been rated for its current condition but is subject to regular state inspection, permitting, and enforcement to ensure its continued functionality and safety. While the spillway is uncontrolled, the dam itself helps regulate water flow along the TR-Waubonsie Creek, contributing to the overall health and sustainability of the watershed.
Enthusiasts interested in water resource management and climate resilience will find Waubonsie Creek Watershed Site 9-1 a fascinating example of local government collaboration and sustainable infrastructure development. As a key player in flood risk reduction and water storage in the area, this site showcases the importance of effective watershed management and the role of earth dams in enhancing water security and environmental protection. With its strategic location and multi-purpose design, this site stands as a testament to the ongoing efforts to safeguard water resources in Iowa.
Year Completed |
1976 |
Dam Length |
460 |
Dam Height |
47 |
River Or Stream |
TR-WAUBONSIE CREEK |
Primary Dam Type |
Earth |
Surface Area |
22.4 |
Drainage Area |
0.3 |
Nid Storage |
639 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
47 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Nishnabotna River At Randolph
|
420cfs |
Weeping Water Creek At Union
|
20cfs |
Missouri River At Nebraska City
|
25100cfs |
Nishnabotna River Above Hamburg
|
605cfs |
Platte R At Louisville Ne
|
6300cfs |
Missouri River At Omaha
|
17700cfs |
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 9-1
US 34;US 275 Mills County