F. Miller Reservoir Report

Last Updated: December 6, 2025

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Summary

Miller is a private earth dam located in Ziebach, South Dakota, along the TR CHEYENNE river. Built in 1938, this dam stands at a height of 23 feet and has a storage capacity of 142 acre-feet. Despite its age, F. Miller is classified as having a low hazard potential and its condition is currently marked as "Not Rated." The dam is under the regulatory jurisdiction of the South Dakota Department of Environment and Natural Resources (DENR), with state permitting, inspection, and enforcement all in place to ensure its continued safety and compliance.

Managed by a private owner, F. Miller serves as a vital water resource for the surrounding area, providing a normal storage capacity of 50 acre-feet and a maximum discharge rate of 1050 cubic feet per second. While specific purposes for the dam are not listed, its presence along the TR CHEYENNE river contributes to both water management and climate resilience efforts in the region. The dam has not undergone recent modifications and lacks certain emergency preparedness measures, such as an Emergency Action Plan (EAP) or updated inundation maps. However, with its low hazard potential and regulatory oversight in place, F. Miller continues to play a crucial role in water resource management in South Dakota.

Overall, F. Miller stands as an important infrastructure piece in the St. Paul District, providing essential water storage and flood control benefits to the local community. With its historical significance dating back to the late 1930s, this dam serves as a testament to early water management practices in the region. While its condition assessment is pending and certain emergency preparedness measures are lacking, the regulatory oversight from DENR and inspection protocols ensure that F. Miller remains a reliable and safe water resource for both current and future generations of South Dakotans.

Year Completed

1938

Dam Length

280

Dam Height

23

River Or Stream

TR CHEYENNE

Primary Dam Type

Earth

Hydraulic Height

23

Nid Storage

142

Hazard Potential

Low

Nid Height

23
       
Seasonal Comparison

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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.