Mill Picayune Watershed Site P-64-1 Reservoir Report
Last Updated: December 15, 2025
The Mill Picayune Watershed Site P-64-1 in Woodbine, Iowa, is a crucial infrastructure designed by the USDA NRCS to serve multiple purposes including fire protection, stock, and small fish pond management, and flood risk reduction.
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Summary
Completed in 1986, this earth dam stands at a height of 48 feet and spans a length of 582 feet, with a storage capacity of 143 acre-feet. Situated along the TR-Picayune Creek, this site is state-regulated by the Iowa DNR and has a low hazard potential.
With a surface area of 5.2 acres and a drainage area of 0.31 square miles, the Mill Picayune Watershed Site is a significant component of the local water resource management system. Despite being uncontrolled, the spillway of this dam ensures the safety of the surrounding areas during heavy rainfall events. The risk assessment for this site is moderate, with a need for ongoing risk management measures to maintain its functionality and safety standards.
The location of the Mill Picayune Watershed Site P-64-1, its design by the USDA NRCS, and its role in water resource management make it a valuable asset for the Woodbine community in Iowa. As climate change continues to impact water resources, this dam plays a crucial role in mitigating flood risks and providing essential water management services for the region.
Year Completed |
1986 |
Dam Length |
582 |
Dam Height |
48 |
River Or Stream |
TR- PICAYUNE CR. |
Primary Dam Type |
Earth |
Surface Area |
5.2 |
Drainage Area |
0.31 |
Nid Storage |
143 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
48 |
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 |
West Nishnabotna River At Hancock
|
154cfs |
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-64-1