Stnot Ratedgis #4 Reservoir Report

Last Updated: December 5, 2025

Stnot Ratedgis #4 is a gravity dam located in South Dakota, specifically in Meade County near the city of STNot RatedGIS.


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Summary

Built in 1929, this dam stands at a height of 37 feet and has a length of 200 feet. It serves the primary purpose of controlling water flow on Alkali Creek, with a maximum discharge capacity of 185 cubic feet per second.

Managed by the local government and regulated by the South Dakota Department of Agriculture and Natural Resources, Stnot Ratedgis #4 is considered to have a significant hazard potential. Despite being in operation for several decades, the dam's condition assessment currently remains "Not Rated," indicating a need for further evaluation and potential upgrades to ensure its structural integrity and safety. The last inspection of the dam took place in July 1986.

With its vital role in managing water resources and mitigating flood risks in the area, Stnot Ratedgis #4 serves as a critical infrastructure for the community. As climate change continues to impact water availability and extreme weather events, the maintenance and monitoring of dams like Stnot Ratedgis #4 become increasingly essential for safeguarding both the environment and the local population against potential hazards and ensuring sustainable water resource management for the future.

Year Completed

1929

Dam Length

200

Dam Height

37

River Or Stream

ALKALI CREEK

Primary Dam Type

Gravity

Hydraulic Height

37

Drainage Area

2

Nid Storage

54

Hazard Potential

Significant

Nid Height

37
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.