Gant Creek Watershed Site D-5 Reservoir Report
Last Updated: December 14, 2025
Located in Plymouth County, Iowa, Gant Creek Watershed Site D-5 is a local government-owned structure designed by USDA NRCS for the primary purpose of fire protection, stock, or small fish pond.
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Summary
Completed in 1967, this earth dam stands at a height of 47 feet and stretches 380 feet in length, with a storage capacity of 59 acre-feet. Situated along the TR-Big Sioux River, this site serves multiple purposes including flood risk reduction, covering a drainage area of 0.22 square miles and a surface area of 3.1 acres.
Managed by the Iowa Department of Natural Resources, Gant Creek Watershed Site D-5 falls under state jurisdiction, with permitting, inspection, and enforcement responsibilities carried out by the state regulatory agency. Despite its low hazard potential, the site has a moderate risk assessment rating of 3, indicating a need for proactive risk management measures. While the condition assessment is currently not rated, the structure has not undergone any modifications in recent years, highlighting its stability and resilience in safeguarding the surrounding environment and community against potential hazards.
With its strategic location and multifaceted functions, Gant Creek Watershed Site D-5 plays a critical role in water resource management and climate resilience efforts in the region. As water enthusiasts and climate advocates continue to monitor and assess the site's performance, its impact on flood control, fire protection, and environmental sustainability remains a focal point for ongoing conservation and improvement initiatives.
Year Completed |
1967 |
Dam Length |
380 |
Dam Height |
47 |
River Or Stream |
TR-BIG SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
3.1 |
Drainage Area |
0.22 |
Nid Storage |
59 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
47 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Sioux River At Akron
|
816cfs |
Perry Creek Near Milnerville
|
25cfs |
Floyd River At James
|
187cfs |
Vermillion River Nr Vermillion Sd
|
33cfs |
Missouri River At Sioux City
|
13700cfs |
Omaha Cr At Homer
|
45cfs |
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.
Gant Creek Watershed Site D-5
State Highway 3 Plymouth County