Twelve Mile Creek Watershed Site 35-2 Reservoir Report
Last Updated: December 12, 2025
Located in Union County, Iowa, Twelve Mile Creek Watershed Site 35-2 is a crucial water resource managed by the local government and designed by the USDA NRCS.
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Summary
This earth dam, completed in 1986, serves multiple purposes including fire protection, stock pond, small fish pond, and flood risk reduction. With a dam height of 30 feet and a storage capacity of 182 acre-feet, the site covers a drainage area of 0.58 square miles and has a surface area of 6.7 acres.
Managed by the Iowa DNR, this site has a low hazard potential and is currently rated as not assessed for its condition. However, it poses a moderate risk, with emergency action planning and risk management measures yet to be specified. As part of the Twelve Mile Creek watershed, this site plays a crucial role in managing water resources in the region and mitigating flood risks. With its strategic location and purpose, this site exemplifies the importance of sustainable water resource management in the face of climate change challenges.
Overall, Twelve Mile Creek Watershed Site 35-2 stands as a testament to the collaborative efforts between local government, federal agencies, and designers to protect and manage water resources effectively. Its role in fire protection, stock pond management, and flood risk reduction highlights the site's versatility and importance in ensuring water security for the surrounding area. As climate change continues to impact water resources, sites like Twelve Mile Creek Watershed Site 35-2 become essential in promoting sustainable water management practices and safeguarding communities against natural disasters.
Year Completed |
1986 |
Dam Length |
470 |
Dam Height |
30 |
River Or Stream |
TR-TWELVE MILE CREEK |
Primary Dam Type |
Earth |
Surface Area |
6.7 |
Drainage Area |
0.58 |
Nid Storage |
182 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Thompson River At Davis City
|
22cfs |
East Fork 102 River At Bedford
|
1cfs |
Raccoon River At Van Meter
|
1640cfs |
North River Near Norwalk
|
48cfs |
South River Near Ackworth
|
18cfs |
Middle River Near Indianola
|
48cfs |
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.
Twelve Mile Creek Watershed Site 35-2
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