Mill Picayune Watershed Site P-90-1 Reservoir Report
Last Updated: December 14, 2025
Located in Woodbine, Iowa, the Mill Picayune Watershed Site P-90-1 is a dam managed by the local government with oversight from the Iowa Department of Natural Resources.
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Summary
Built in 1984 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock watering, and flood risk reduction for the area. With a height of 53 feet and a length of 600 feet, the dam has a storage capacity of 208 acre-feet and covers a surface area of 9 acres.
The dam is situated on the TR- Picayune Creek in Shelby County, Iowa, within the Rock Island District. With a low hazard potential and a moderate risk assessment rating, the Mill Picayune Watershed Site P-90-1 is not currently rated for its condition but is regularly inspected and maintained by the local authorities. While its primary purpose is for fire protection and water storage, the dam also contributes to flood risk reduction in the area, showcasing its importance in managing water resources and protecting the community from potential hazards.
As a key infrastructure for water management in the region, the Mill Picayune Watershed Site P-90-1 plays a vital role in ensuring water availability for various uses while minimizing flood risks. With its earth dam structure and regulated state jurisdiction, the site stands as a testament to the collaborative efforts between local government and regulatory agencies to safeguard water resources and enhance climate resilience in the face of changing environmental conditions.
Year Completed |
1984 |
Dam Length |
600 |
Dam Height |
53 |
River Or Stream |
TR- PICAYUNE CR. |
Primary Dam Type |
Earth |
Surface Area |
9 |
Drainage Area |
0.33 |
Nid Storage |
208 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
53 |
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-90-1