Heisler Creek Subwtrshd Sta 29+80 #3d Reservoir Report
Last Updated: December 14, 2025
Heisler Creek Subwatershed Station 29+80 #3d is a dam located in Hornick, Iowa, designed by USDA NRCS and completed in 1960 for fire protection, stock maintenance, and flood risk reduction purposes.
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Summary
The earth dam stands at a height of 40 feet and stretches 492 feet in length, with a storage capacity of 36 acre-feet. Situated on the TR-West Fork Little Sioux River, this structure is state-regulated and inspected, with a low hazard potential and a moderate risk assessment rating.
Owned by the local government and managed by the Iowa DNR, Heisler Creek Subwatershed Station plays a vital role in managing water resources in Woodbury County. The dam has an uncontrolled spillway and a surface area of 2.8 acres, serving a drainage area of 0.2 square miles. Although the dam is not USACE-regulated, it meets state permitting, inspection, and enforcement requirements, ensuring its operational integrity and safety for the surrounding community.
With its strategic location and design, this dam provides essential water management functions while mitigating flood risks and protecting local ecosystems. Its presence contributes to the overall resilience of the area against potential water-related challenges, making it a key asset for sustainable water resource management in the region.
Year Completed |
1960 |
Dam Length |
492 |
Dam Height |
40 |
River Or Stream |
TR-WEST FORK LITTLE SIOUX RIV |
Primary Dam Type |
Earth |
Surface Area |
2.8 |
Drainage Area |
0.2 |
Nid Storage |
36 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Missouri River At Sioux City
|
13700cfs |
Omaha Cr At Homer
|
45cfs |
Floyd River At James
|
187cfs |
Little Sioux River At Correctionville
|
327cfs |
Maple River At Mapleton
|
323cfs |
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.
Heisler Creek Subwtrshd Sta 29+80 #3d