Mill Picayune Watershed Site 13-1 Reservoir Report
Last Updated: December 13, 2025
Mill Picayune Watershed Site 13-1, located in Woodbine, Iowa, is a vital water resource managed by the local government.
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Summary
This earth dam, completed in 1975, serves multiple purposes including fire protection, stock, and small fish pond maintenance, as well as flood risk reduction. With a dam height of 47 feet and a storage capacity of 67 acre-feet, this structure plays a crucial role in managing water flow in the TR-Mill Creek.
Maintained by the USDA NRCS and regulated by the Iowa DNR, this site is designed to withstand low hazard potential with a moderate risk assessment rating. The dam, with a length of 440 feet, holds a normal storage capacity of 53 acre-feet and covers a surface area of 3 acres. Despite not being rated for condition assessment, the site is inspected, permitted, and enforced by state agencies, ensuring its operational integrity and safety for the surrounding community.
With its strategic location and purposeful design, Mill Picayune Watershed Site 13-1 stands as a testament to effective water resource management and climate resilience efforts in Shelby County, Iowa. This site not only serves practical functions but also exemplifies the collaboration between local and state agencies in safeguarding water resources and mitigating flood risks for the region. As climate enthusiasts and water resource advocates, this site serves as a beacon of sustainable water infrastructure development and management in the face of environmental challenges.
Year Completed |
1975 |
Dam Length |
440 |
Dam Height |
47 |
River Or Stream |
TR-MILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
0.16 |
Nid Storage |
67 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
47 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Boyer River At Logan
|
417cfs |
Soldier River At Pisgah
|
112cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Maple River At Mapleton
|
323cfs |
West Nishnabotna River At Hancock
|
154cfs |
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.
Mill Picayune Watershed Site 13-1