Gothier No.2 Subwatershed M-10840 Reservoir Report
Last Updated: December 13, 2025
Gothier No.2 Subwatershed M-10840, located in Woodbury County, Iowa, is a vital water resource managed by the local government.
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Summary
This earth dam, designed by USDA NRCS and completed in 1964, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a maximum storage capacity of 50 acre-feet and a normal storage of 22 acre-feet, this dam covers a surface area of 2.9 acres and has a drainage area of 0.19 square miles, making it a crucial asset for water management in the region.
The dam, situated on the TR-Little Sioux River, has a height of 35 feet and a length of 285 feet, with an uncontrolled spillway type. Despite being deemed low in hazard potential and having a moderate risk assessment score of 3, the dam's condition assessment remains unrated. The Iowa Department of Natural Resources plays a key role in regulating, inspecting, and enforcing state jurisdiction over this dam, ensuring its safe and effective operation for the community of OTO. As a significant element in the region's water infrastructure, Gothier No.2 Subwatershed M-10840 highlights the importance of sustainable water resource management in mitigating climate-related risks and ensuring water availability for various needs.
Year Completed |
1964 |
Dam Length |
285 |
Dam Height |
35 |
River Or Stream |
TR-LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
2.9 |
Drainage Area |
0.19 |
Nid Storage |
50 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
15100cfs |
Little Sioux River Near Turin
|
1040cfs |
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.
Gothier No.2 Subwatershed M-10840