Union Creek Watershed Dt Dam #6 Reservoir Report
Last Updated: December 13, 2025
Union Creek Watershed Dt Dam #6, located in Union, South Dakota, is a locally owned earth dam constructed in 1978 by the USDA NRCS.
°F
°F
mph
Wind
%
Humidity
Summary
This dam, with a height of 39 feet and a length of 594 feet, serves the primary purpose of controlling water flow in the TRIB. W. UNION CREEK stream. With a maximum storage capacity of 90 acre-feet and a normal storage capacity of 68 acre-feet, the dam plays a crucial role in managing water resources in the area.
Managed by the DENR in South Dakota, Union Creek Watershed Dt Dam #6 has a low hazard potential and is currently in a condition that is not rated. Despite not being assessed recently, the dam's emergency action plan status and risk management measures remain unspecified. The dam's location in the SESE,32-94-49 area and its design by the Natural Resources Conservation Service highlight its importance in ensuring water resource sustainability in the region. Water resource and climate enthusiasts will find Union Creek Watershed Dt Dam #6 a fascinating structure contributing to the ecological balance of the Union Creek watershed.
While the dam has not been modified in recent years and lacks detailed inspection and emergency preparedness information, its role in regulating water flow and storage in the region cannot be overstated. With a history dating back to over four decades, Union Creek Watershed Dt Dam #6 stands as a testament to the collaborative efforts of local government agencies and the USDA NRCS in managing water resources effectively. As climate change impacts water availability and quality, dams like Union Creek Watershed Dt Dam #6 play a crucial role in ensuring sustainable water management practices for the future.
Year Completed |
1978 |
Dam Length |
594 |
Dam Height |
39 |
River Or Stream |
TRIB. W. UNION CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
39 |
Drainage Area |
1 |
Nid Storage |
90 |
Hazard Potential |
Low |
Nid Height |
39 |
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 |
Rock River Near Rock Valley
|
321cfs |
Missouri River At Sioux City
|
15100cfs |
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 #6