Oakley Eide No.1 Reservoir Report
Nearby: Randall Rc&D #176 Oakley Eide No.2
Last Updated: December 13, 2025
Oakley Eide No.1 is a privately owned earth dam located in Gregory, South Dakota, along the Whetstone Creek offstream.
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Summary
Constructed in 1969, this dam stands at a height of 35 feet with a hydraulic height of 31 feet and a length of 352 feet. It has a storage capacity of 76 acre-feet, with a maximum discharge rate of 2117 cubic feet per second. The dam is regulated and inspected by the South Dakota Department of Environment and Natural Resources, ensuring its safety and compliance with state regulations.
Managed by the Natural Resources Conservation Service, Oakley Eide No.1 has a low hazard potential and is currently considered to be in "Not Rated" condition. Although the dam has not been assessed for its emergency action plan or risk management measures, it meets state permitting, inspection, and enforcement requirements. With its strategic location and crucial role in water resource management, Oakley Eide No.1 serves as an important structure in mitigating flood risks and ensuring water supply reliability in the region.
Overall, Oakley Eide No.1 is a vital component of the water infrastructure in Gregory, South Dakota, providing essential flood protection and water storage capabilities. As a well-maintained and regulated dam, it plays a key role in safeguarding the local community and ecosystems against potential hazards and risks associated with water resource management and climate variability. With its low hazard potential and adherence to state regulatory standards, Oakley Eide No.1 stands as a testament to effective water resource management practices in the region.
Year Completed |
1969 |
Dam Length |
352 |
Dam Height |
35 |
River Or Stream |
WHETSTONE CREEK OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
31 |
Nid Storage |
76 |
Hazard Potential |
Low |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Platte Creek Near Platte
|
3cfs |
Keya Paha R At Wewela Sd
|
54cfs |
Niobrara River At Mariaville
|
1650cfs |
White R Near Oacoma Sd
|
105cfs |
Long Pine Creek Near Riverview
|
191cfs |
Keya Paha R Near Keyapaha Sd
|
33cfs |
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.
Oakley Eide No.1