Gustaue Aman Reservoir Report
Nearby: Krumm Dam Standing Rock Tribe
Last Updated: December 13, 2025
Gustaue Aman is a privately owned dam located in Corson, South Dakota along the TR-OAK CREEK.
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Summary
Built in 1938, this earth dam stands at 14 feet high and stretches 500 feet in length, with a storage capacity of 95 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and is subject to state permitting, inspection, and enforcement protocols.
The dam's primary purpose and associated structures are unspecified, but it is classified as a significant hazard with a condition assessment of "Not Rated." Despite its age, Gustaue Aman has a maximum discharge capacity of 2080 cubic feet per second and falls under the jurisdiction of the St. Paul District of the US Army Corps of Engineers. The dam's emergency action plan and risk management measures are currently not available, suggesting room for improvement in emergency preparedness.
With its historical significance and vital role in water resource management, Gustaue Aman serves as a notable example of early dam infrastructure in South Dakota. As water resource and climate enthusiasts continue to monitor and assess the condition of dams like Gustaue Aman, ensuring their safety and resilience for the future remains a critical priority in sustainable water management practices.
Year Completed |
1938 |
Dam Length |
500 |
Dam Height |
14 |
River Or Stream |
TR-OAK CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
95 |
Hazard Potential |
Significant |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Grand R At Little Eagle Sd
|
47cfs |
Oak Cr Near Wakpala Sd
|
10cfs |
Cedar Creek Nr Raleigh
|
20cfs |
Cannonball River Nr Raleigh
|
40cfs |
Cannonball River At Breien
|
96cfs |
Beaver Creek Bl Linton
|
39cfs |
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.
Gustaue Aman