Sunrise Subwatershed Site 6a-1 Reservoir Report
Last Updated: December 15, 2025
Sunrise Subwatershed Site 6a-1, located in Woodbury County, Iowa, is a vital water resource managed by the local government with assistance from the USDA NRCS.
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Summary
This earth dam, completed in 1973, serves multiple purposes including fire protection, stock watering, small fish pond management, and flood risk reduction. With a height of 52 feet and a storage capacity of 120 acre-feet, this dam plays a crucial role in regulating water flow in the TR-Little Sioux River.
The dam's low hazard potential and moderate risk assessment make it a valuable asset for water management in the region. While its condition is currently not rated, the Iowa Department of Natural Resources oversees its regulation, inspection, and enforcement to ensure its safety and functionality. Despite its uncontrolled spillway and lack of outlet gates, this structure has been serving the community effectively for nearly five decades, highlighting its importance in maintaining water quality and quantity for both human and ecological needs in the area.
Overall, Sunrise Subwatershed Site 6a-1 stands as a testament to the collaborative efforts between local government agencies and federal partners in managing water resources effectively. With its strategic location, multi-purpose design, and low hazard potential, this dam plays a critical role in enhancing water security, flood resilience, and ecosystem sustainability in the region. Its continued oversight and maintenance underscore the commitment to safeguarding this valuable water infrastructure for future generations of climate and water resource enthusiasts.
Year Completed |
1973 |
Dam Length |
591 |
Dam Height |
52 |
River Or Stream |
TR-LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
5.9 |
Drainage Area |
0.48 |
Nid Storage |
120 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
52 |
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
|
14800cfs |
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 6a-1