Waterbnot Ratedy Dam Reservoir Report
Nearby: Herrick Lake Steffen Dam
Last Updated: December 13, 2025
Waterbnot Ratedy Dam, located in Gregory, South Dakota, is a privately owned structure that plays a crucial role in regulating the flow of the Tributary Ponca Creek.
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Summary
Built in 1976, this Earth type dam stands at a height of 60 feet and has a length of 1100 feet, with a storage capacity of 900 acre-feet. Despite being marked as "Not Rated" in terms of condition assessment, the hazard potential of the dam is classified as low, providing a sense of security to the surrounding community.
Managed by the South Dakota Department of Agriculture and Natural Resources, Waterbnot Ratedy Dam is subject to state regulation, inspection, and enforcement. The dam has been designed to withstand maximum discharges and is equipped with outlet gates for controlled water release. Although the dam has not been updated or modified in recent years, it continues to serve its primary purpose effectively, ensuring water resource management and flood control in the area.
With its strategic location and vital role in water management, Waterbnot Ratedy Dam stands as a testament to human ingenuity in harnessing natural resources for the benefit of society. The dam's low hazard potential, coupled with state oversight and regular inspections, instills confidence in its ability to withstand potential risks and protect the local community from adverse impacts of climate change. For water resource and climate enthusiasts, Waterbnot Ratedy Dam serves as a noteworthy example of infrastructure designed to adapt to changing environmental conditions and serve the needs of both people and the environment.
Year Completed |
1976 |
Dam Length |
1100 |
Dam Height |
60 |
River Or Stream |
TRIB. PONCA CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
60 |
Nid Storage |
900 |
Hazard Potential |
Low |
Nid Height |
60 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Niobrara River At Mariaville
|
1650cfs |
Platte Creek Near Platte
|
3cfs |
Keya Paha R At Wewela Sd
|
54cfs |
Long Pine Creek Near Riverview
|
191cfs |
Keya Paha R Near Keyapaha Sd
|
33cfs |
White R Near Oacoma Sd
|
105cfs |
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.
Waterbnot Ratedy Dam