Sunrise Subwatershed Site 6-1 Reservoir Report
Last Updated: December 14, 2025
Sunrise Subwatershed Site 6-1 in Woodbury County, Iowa, is a vital water management structure owned by the local government and regulated by the Iowa Department of Natural Resources.
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Summary
Built in 1973 by the USDA NRCS, this earth dam serves multiple purposes, including fire protection, stock watering, and flood risk reduction. With a height of 47 feet and a storage capacity of 110 acre-feet, this dam plays a crucial role in managing water resources in the area.
Located near OTO along the TR-Little Sioux River, this dam covers a surface area of 5.1 acres and has a drainage area of 0.64 square miles. Despite having a low hazard potential, the dam's risk assessment is moderate, indicating the importance of ongoing monitoring and maintenance. With a condition assessment that is currently not rated, there is a need for regular inspections and risk management measures to ensure the dam's continued effectiveness in protecting the surrounding community and environment.
As an essential piece of infrastructure in the region, Sunrise Subwatershed Site 6-1 provides valuable benefits in terms of water resource management and climate resilience. With its strategic location and multi-purpose design, this dam stands as a testament to the collaborative efforts of various agencies and stakeholders in safeguarding the local area against potential water-related hazards.
Year Completed |
1973 |
Dam Length |
418 |
Dam Height |
47 |
River Or Stream |
TR-LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
5.1 |
Drainage Area |
0.64 |
Nid Storage |
110 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
47 |
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.
Sunrise Subwatershed Site 6-1