Elkhorn No.2 Subwatershed Site 1-3 Reservoir Report
Last Updated: December 15, 2025
Located in Plymouth County, Iowa, the Elkhorn No.2 Subwatershed Site 1-3 is a local government-owned dam designed by the USDA NRCS for fire protection, stock, and small fish pond purposes.
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Summary
Completed in 1984, this earth dam stands at 36 feet high with a length of 660 feet, providing a storage capacity of 146 acre-feet. The dam serves to reduce flood risks and is regulated by the Iowa DNR, with state permitting, inspection, and enforcement in place to ensure its safety and functionality.
Situated on the TR-W. FK. LITTLE SIOUX RIVER, the Elkhorn No.2 Subwatershed Site 1-3 has a low hazard potential and a moderate risk assessment rating. With a surface area of 6.1 acres and a drainage area of 0.91 square miles, this dam plays a crucial role in water resource management and climate resilience in the region. While not currently rated for condition assessment, the dam's design and construction by the Natural Resources Conservation Service reflect a commitment to sustainable water infrastructure for the community of MOVILLE.
As a key feature in the local water management system, the Elkhorn No.2 Subwatershed Site 1-3 contributes to the overall ecosystem health and water security in Plymouth County. With its multiple purposes and regulated status, this dam underscores the importance of proactive maintenance and risk management in safeguarding water resources and adapting to changing climate conditions.
Year Completed |
1984 |
Dam Length |
660 |
Dam Height |
36 |
River Or Stream |
TR-W. FK. LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
6.1 |
Drainage Area |
0.91 |
Nid Storage |
146 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
Floyd River At James
|
187cfs |
Perry Creek Near Milnerville
|
25cfs |
Missouri River At Sioux City
|
13700cfs |
West Fork Ditch At Hornick
|
80cfs |
Floyd River At Alton
|
36cfs |
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.
Elkhorn No.2 Subwatershed Site 1-3