Davis Subwatershed 7-1580 Reservoir Report
Last Updated: December 13, 2025
Davis Subwatershed 7-1580, located in Woodbury, Iowa, is a vital water resource managed by the local government with regulatory oversight from the Iowa Department of Natural Resources.
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Summary
The dam, completed in 1958 by the USDA NRCS, serves multiple purposes including fire protection, stock, and small fish pond, as well as flood risk reduction for the surrounding area. With a low hazard potential and a moderate risk assessment, the dam has a storage capacity of 26 acre-feet and covers a surface area of 0.8 acres.
Situated along the Cottonwood Hollow river, the earth dam stands at a height of 36 feet and spans 350 feet in length. It is designed to withstand the hydraulic pressures of the water flow, with a spillway type classified as uncontrolled. Despite not being rated for condition assessment, the dam is inspected, permitted, and enforced by state regulatory agencies, ensuring its structural integrity and functionality for the community of Turin and the surrounding area.
With multiple layers of oversight and management, Davis Subwatershed 7-1580 plays a crucial role in water resource management and climate resilience in the region. The dam's design and construction by the Natural Resources Conservation Service reflect a commitment to sustainable water infrastructure for the protection and benefit of local ecosystems and communities. As water resource and climate enthusiasts, understanding and advocating for the effective stewardship of dams like Davis Subwatershed 7-1580 is essential for ensuring a resilient and sustainable water future.
Year Completed |
1958 |
Dam Length |
350 |
Dam Height |
36 |
River Or Stream |
COTTONWOOD HOLLOW |
Primary Dam Type |
Earth |
Surface Area |
0.8 |
Drainage Area |
0.15 |
Nid Storage |
26 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Little Sioux River Near Turin
|
1040cfs |
Missouri River At Decatur
|
15500cfs |
Little Sioux River At Correctionville
|
327cfs |
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.
Davis Subwatershed 7-1580