Mill Picayune Watershed Site N-14-2 Reservoir Report
Last Updated: December 14, 2025
Located in Woodbine, Iowa, the Mill Picayune Watershed Site N-14-2 is a vital earth dam constructed in 1975 for fire protection, stock, and small fish pond purposes.
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Summary
Managed by the USDA NRCS, this site plays a crucial role in flood risk reduction in the area. With a dam height of 43 feet and a storage capacity of 43 acre-feet, this structure sits on TR-Mill Creek, within the Rock Island District.
The dam, with a length of 300 feet and a surface area of 3 acres, serves as a low hazard potential structure with a moderate risk assessment score of 3. While the condition of the dam is currently not rated, it is regulated and inspected by the Iowa DNR. The site, with a drainage area of 0.2 square miles, plays a key role in water resource management in Shelby County, Iowa.
For water resource and climate enthusiasts, the Mill Picayune Watershed Site N-14-2 offers a fascinating example of how local government, in collaboration with federal agencies like the USDA NRCS, works towards sustainable water management practices. With its strategic location on TR-Mill Creek and its multifaceted purposes, this earth dam stands as a testament to the importance of infrastructure in mitigating flood risks and supporting various ecological functions in the region.
Year Completed |
1975 |
Dam Length |
300 |
Dam Height |
43 |
River Or Stream |
TR-MILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
0.2 |
Nid Storage |
43 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
43 |
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 |
Maple River At Mapleton
|
323cfs |
West Nishnabotna River At Hancock
|
154cfs |
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 N-14-2