George Tnot Ratedner Reservoir Report
Nearby: Ed Berens Dam Leo Berens
Last Updated: December 13, 2025
George Tnot Ratedner, a privately owned dam located in Walworth, South Dakota, stands as a vital structure regulated by the state's Department of Environment and Natural Resources.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1950, this earth dam spans 400 feet in length and reaches a height of 32 feet, holding a storage capacity of 400 acre-feet. Situated on the TR MISSIONot RatedI river, this low-hazard dam plays a crucial role in regulating water flow and storage in the region.
Despite its age, George Tnot Ratedner has a condition assessment of "Not Rated" and a low hazard potential. The dam's inspection, permitting, and enforcement are all managed by the state, ensuring its continued safety and functionality. Owned by a private entity, this dam serves as an essential piece of infrastructure in the area, contributing to water resource management and climate resilience efforts.
Managed by the St. Paul District of the US Army Corps of Engineers, George Tnot Ratedner lacks certain features such as spillways or locks, yet continues to provide valuable water storage and flow regulation services. Its strategic location and design make it a key asset in South Dakota's water infrastructure landscape, reflecting the importance of maintaining and monitoring dams for sustainable water resource management in the face of changing climates.
Year Completed |
1950 |
Dam Length |
400 |
Dam Height |
32 |
River Or Stream |
TR MISSONot RatedI |
Primary Dam Type |
Earth |
Hydraulic Height |
32 |
Nid Storage |
400 |
Hazard Potential |
Low |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Oak Cr Near Wakpala Sd
|
10cfs |
Grand R At Little Eagle Sd
|
47cfs |
Moreau R Near Whitehorse Sd
|
35cfs |
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.
George Tnot Ratedner