Sd Noname 173 Reservoir Report
Nearby: Sd Noname 174 Sd Noname 138
Last Updated: December 6, 2025
Sd Noname 173 is a privately owned dam in Pennington, South Dakota, with a state-regulated status by the South Dakota Department of Environment and Natural Resources.
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Summary
Built in 1957, this earth dam stands at a height of 25 feet and has a storage capacity of 55 acre-feet, serving the primary purpose of water resource management for the TR-CHEYENNE river or stream. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment.
Managed by the Natural Resources Conservation Service, Sd Noname 173 has not been modified over the years and does not have an Emergency Action Plan (EAP) in place. Despite the lack of recent inspections and comprehensive risk assessment measures, the dam continues to operate within regulated guidelines. Located within the St. Paul District of the US Army Corps of Engineers jurisdiction, Sd Noname 173 plays a crucial role in water storage and discharge, contributing to the overall water resource management efforts in the region. Enthusiasts interested in climate resilience and water resource sustainability would find the details of Sd Noname 173's infrastructure and operational status intriguing and informative.
Year Completed |
1957 |
Dam Length |
440 |
Dam Height |
25 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
55 |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
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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.
Sd Noname 173