Mill Picayune Watershed Site M-16-6 Reservoir Report
Last Updated: December 13, 2025
Located in Woodbine, Iowa, the Mill Picayune Watershed Site M-16-6 is a local government-owned earth dam constructed in 1989 by the USDA NRCS.
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Summary
This dam serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a maximum storage capacity of 530 acre-feet and a normal storage of 132 acre-feet, this dam covers a surface area of 16.3 acres and has a drainage area of 2.4 square miles.
The Mill Picayune Watershed Site M-16-6 has a low hazard potential with a moderate risk rating and is regulated by the Iowa Department of Natural Resources. The dam, standing at a height of 44 feet and a length of 700 feet, features an uncontrolled spillway type. Despite not being rated for its condition assessment, this dam plays a crucial role in water resource management and emergency preparedness in the region. With its strategic location on TR-Mill Creek, this watershed site is a vital component of the local ecosystem and climate resilience efforts in Shelby County, Iowa.
For water resource and climate enthusiasts, the Mill Picayune Watershed Site M-16-6 offers a fascinating case study in dam infrastructure management and environmental stewardship. With its multifaceted purposes and regulated status, this earth dam exemplifies the intersection of human engineering with natural ecosystems. As efforts continue to enhance risk management measures and emergency preparedness at this site, it serves as a reminder of the importance of sustainable water resource practices in the face of a changing climate.
Year Completed |
1989 |
Dam Length |
700 |
Dam Height |
44 |
River Or Stream |
TR- MILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
16.3 |
Drainage Area |
2.4 |
Nid Storage |
530 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
44 |
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 M-16-6