Little Beaver Subwatershed M-10001 Reservoir Report
Last Updated: December 14, 2025
The Little Beaver Subwatershed M-10001 is a significant earth dam located in Woodbury, Iowa, near the Missouri River.
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Summary
Built in 1957, this dam serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a maximum storage capacity of 130 acre-feet and a normal storage of 26 acre-feet, this dam covers a surface area of 2.9 acres and has a drainage area of 0.67 square miles.
Managed by the local government and designed by the USDA NRCS, the Little Beaver Subwatershed M-10001 is regulated by the Iowa DNR and has a low hazard potential. The dam has not been rated for its condition assessment, but it meets moderate risk guidelines. Despite its uncontrolled spillway type and lack of outlet gates, this dam plays a crucial role in water resource management in the region. Enthusiasts of water resources and climate will find the details of this dam fascinating and essential for understanding the impact of infrastructure on the environment.
Year Completed |
1957 |
Dam Length |
400 |
Dam Height |
38 |
River Or Stream |
TR-WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.9 |
Drainage Area |
0.67 |
Nid Storage |
130 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Little Sioux River At Correctionville
|
327cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Missouri River At Decatur
|
14900cfs |
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.
Little Beaver Subwatershed M-10001