Mill Picayune Watershed Site P-47-2 Reservoir Report
Last Updated: December 15, 2025
Located in Woodbine, Iowa, the Mill Picayune Watershed Site P-47-2 is a vital structure owned by the local government and regulated by the Iowa Department of Natural Resources.
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Summary
Designed by the USDA NRCS, this earth dam was completed in 1975 and serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a height of 36 feet and a storage capacity of 142 acre-feet, this structure plays a crucial role in managing water resources in the area.
The dam sits on TR-Picayune Creek and covers a drainage area of 0.19 square miles, providing a surface area of 5 acres. Despite its low hazard potential, the site has a moderate risk rating of 3. While the condition assessment is currently not rated, the dam's risk management measures are not specified. With no associated structures and a lack of recent inspection data, there are opportunities for further evaluation and enhancement of this watershed site to ensure its continued effectiveness in water resource management and climate resilience efforts.
Overall, the Mill Picayune Watershed Site P-47-2 is a significant infrastructure in Shelby County, Iowa, contributing to water conservation, flood control, and emergency preparedness. As climate change intensifies and water resources become increasingly crucial, the maintenance and monitoring of structures like this will be essential for sustainable water management and environmental protection in the region.
Year Completed |
1975 |
Dam Length |
530 |
Dam Height |
36 |
River Or Stream |
TR-PICAYUNE CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
0.19 |
Nid Storage |
142 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Boyer River At Logan
|
417cfs |
Soldier River At Pisgah
|
112cfs |
Little Sioux River Near Turin
|
1040cfs |
West Nishnabotna River At Hancock
|
154cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Maple River At Mapleton
|
323cfs |
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 P-47-2