Mill Picayune Watershed Site M-24-17 Reservoir Report
Last Updated: December 13, 2025
Located in Shelby, Iowa, the Mill Picayune Watershed Site M-24-17 is a crucial water resource managed by the local government for fire protection, stock, small fish ponds, and flood risk reduction purposes.
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Summary
Constructed in 1984 by the USDA NRCS, this earth dam stands at a height of 44 feet and has a length of 557 feet, providing a storage capacity of 150 acre-feet. The dam's fair condition assessment and significant hazard potential make it a focal point for ongoing monitoring and maintenance efforts.
Managed by the Iowa Department of Natural Resources, this watershed site plays a vital role in protecting the surrounding area from potential flooding events. With a drainage area of 0.35 square miles and a surface area of 5 acres, the dam serves as a critical infrastructure to regulate water flow in the TR- MILL CR. stream. Despite its moderate risk assessment, the dam's fair condition and significant hazard potential highlight the importance of regular inspections and risk management measures to ensure its continued effectiveness and safety for the community.
As part of the Rock Island District, the Mill Picayune Watershed Site M-24-17 is a key component of water resource management in the region. With its uncontrolled spillway type, the dam presents a unique challenge in terms of flood risk reduction and emergency preparedness. By staying vigilant and implementing necessary maintenance and risk management measures, the local government can continue to safeguard the area and ensure the sustainability of this essential water resource for years to come.
Year Completed |
1984 |
Dam Length |
557 |
Dam Height |
44 |
River Or Stream |
TR- MILL CR. |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
0.35 |
Nid Storage |
150 |
Hazard Potential |
Significant |
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 |
Maple River At Mapleton
|
323cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
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-24-17