Mill Picayune Watershed Site P-6 Reservoir Report
Last Updated: December 14, 2025
Mill Picayune Watershed Site P-6, located in Woodbine, Iowa, is a local government-owned dam designed by the USDA NRCS and completed in 1985.
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Summary
This earth dam stands at a height of 45 feet and spans 545 feet, with a storage capacity of 465 acre-feet. Serving multiple purposes including fire protection, stock and small fish pond, flood risk reduction, and others, this dam plays a crucial role in managing water resources in the area.
With a drainage area of 2.2 square miles and a surface area of 7.1 acres, the Mill Picayune Watershed Site P-6 helps regulate the flow of the TR-Picayune Creek. While categorized as having a low hazard potential and a moderate risk assessment rating, the dam is state-regulated and subject to inspection, permitting, and enforcement by the Iowa DNR. Despite not being rated for condition assessment, this dam remains a key infrastructure for water resource management in the region.
Overall, Mill Picayune Watershed Site P-6 serves as a vital component of the local water management system, providing benefits such as flood control and water storage for various purposes. With its strategic location and design, this dam contributes to climate resilience and sustainable water resource management in the Shelby County area of Iowa.
Year Completed |
1985 |
Dam Length |
545 |
Dam Height |
45 |
River Or Stream |
TR-PICAYUNE CR. |
Primary Dam Type |
Earth |
Surface Area |
7.1 |
Drainage Area |
2.2 |
Nid Storage |
465 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
45 |
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-6