Mill Picayune Watershed Site S-10-1 Reservoir Report
Last Updated: December 14, 2025
Located in Woodbine, Iowa, the Mill Picayune Watershed Site S-10-1 is a vital infrastructure for fire protection, stock, and small fish pond purposes, while also serving to reduce flood risks.
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Summary
Constructed in 1962 by the USDA NRCS, this earth dam has a height of 51 feet and a length of 373 feet, with a storage capacity of 104 acre-feet. The dam is situated on the TR-Picayune Creek and covers a surface area of 4.2 acres, serving a drainage area of 0.39 square miles.
Managed by the local government, the Mill Picayune Watershed Site S-10-1 is regulated by the Iowa DNR and undergoes regular inspections to ensure its structural integrity and functionality. With a low hazard potential and a moderate risk assessment, this dam plays a crucial role in water resource management in the region. Despite not being rated for its condition, the dam continues to serve its primary purposes effectively, highlighting its importance in safeguarding the local community and environment.
As a part of the flood risk reduction strategy, the dam features an uncontrolled spillway and is designed to handle moderate discharge levels. While the dam has not been modified in recent years, it remains a key component of the water management infrastructure in the area. With its strategic location and functional design, the Mill Picayune Watershed Site S-10-1 stands as a testament to effective water resource management practices and the commitment to protecting the local ecosystem from potential risks and hazards.
Year Completed |
1962 |
Dam Length |
373 |
Dam Height |
51 |
River Or Stream |
TR-PICAYUNE CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.2 |
Drainage Area |
0.39 |
Nid Storage |
104 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
51 |
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 S-10-1