Union Creek Watershed Dt Dam #9 Reservoir Report
Last Updated: December 13, 2025
Union Creek Watershed Dt Dam #9 is a vital earth dam located in Union, South Dakota, designed by USDA NRCS and completed in 1978.
°F
°F
mph
Wind
%
Humidity
Summary
This dam serves to regulate the flow of the TRIB. W. UNION CREEK, providing essential water resource management for the surrounding area. With a height of 37 feet and a storage capacity of 329 acre-feet, this dam plays a crucial role in flood control and water supply for the region.
Managed by the local government and regulated by DENR, Union Creek Watershed Dt Dam #9 is deemed to have low hazard potential and its condition is currently not rated. Despite lacking certain details such as spillway type and inspection frequency, this dam stands as a testament to effective water resource infrastructure in the area. With Dusty Johnson (R) as the Congressional representative for the district, there is a strong support system in place for the maintenance and operation of this important structure.
As climate change continues to impact water resources and infrastructure, Union Creek Watershed Dt Dam #9 stands as a resilient structure, ensuring the safety and security of the community it serves. With its strategic location and design, coupled with state jurisdiction and permitting, this dam exemplifies the importance of sustainable water management practices in the face of a changing climate.
Year Completed |
1978 |
Dam Length |
881 |
Dam Height |
37 |
River Or Stream |
TRIB. W. UNION CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
37 |
Drainage Area |
1 |
Nid Storage |
329 |
Hazard Potential |
Low |
Nid Height |
37 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Sioux River At Akron
|
816cfs |
Vermillion River Nr Vermillion Sd
|
33cfs |
Perry Creek Near Milnerville
|
25cfs |
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
15100cfs |
Rock River Near Rock Valley
|
321cfs |
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.
Union Creek Watershed Dt Dam #9