George Erk Dam No.1 Reservoir Report
Nearby: Hoover Dam Nestor Kivimaki Dam No.1
Last Updated: December 5, 2025
George Erk Dam No.1, located in Butte, South Dakota, is a private-owned structure that serves as a crucial water resource management system in the region.
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Summary
Completed in 1957, this Earth-type dam stands at a height of 23 feet and has a storage capacity of 55 acre-feet, with a normal storage level of 39 acre-feet. Situated on the tributary South Fork Moreau River, the dam plays a vital role in regulating the flow of water and preventing potential flooding in the area.
Managed and regulated by the South Dakota Department of Environment and Natural Resources (DENR), George Erk Dam No.1 has been classified as having a low hazard potential, indicating a low risk of failure and minimal impact on downstream areas in case of an emergency. Despite its condition being labeled as "Not Rated," the dam is regularly inspected, ensuring its structural integrity and safety. With a maximum discharge capacity of 1890 cubic feet per second, the dam contributes to the overall water management system in the region, highlighting the importance of sustainable water resource practices in mitigating the impacts of climate change.
As a key component of the local water infrastructure, George Erk Dam No.1 represents a critical asset in safeguarding the community against potential water-related hazards. With its strategic location and effective management by the Natural Resources Conservation Service, the dam serves as a testament to the importance of proactive measures in ensuring water resource sustainability amidst changing climate patterns. As water resource and climate enthusiasts, it is essential to recognize the significance of such structures in promoting resilience and adaptation to the challenges posed by a changing climate, highlighting the need for continued investment and stewardship in safeguarding our water resources for future generations.
Year Completed |
1957 |
Dam Length |
548 |
Dam Height |
23 |
River Or Stream |
TRIBUTARY S FORK MOREAU RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
23 |
Nid Storage |
55 |
Hazard Potential |
Low |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
George Erk Dam No.1