Sd Noname 138 Reservoir Report
Nearby: Sd Noname 174 Selvin Johnson
Last Updated: December 6, 2025
Sd Noname 138 is a privately owned earth dam located in Pennington, South Dakota, along the TR-CHEYENNE river.
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Summary
Built in 1957, this dam stands at a height of 20 feet and has a storage capacity of 80 acre-feet, with a normal storage level of 55 acre-feet. Despite its age, Sd Noname 138 is classified as having a low hazard potential and its condition has not been rated.
The dam falls under the jurisdiction of the South Dakota Department of Environment and Natural Resources (DENR), which regulates, inspects, and enforces laws related to its operation. The design of Sd Noname 138 was carried out by the Natural Resources Conservation Service. Although there have been no recent inspections or assessments of its condition, the dam has not been identified as posing an immediate risk, and no Emergency Action Plan (EAP) has been prepared.
Water resource and climate enthusiasts will be interested to know that Sd Noname 138 plays a role in water management and flood control in the region. With its location in a potentially high-risk area, it is important for authorities to regularly monitor and assess the condition of this dam to ensure its safety and the protection of downstream communities.
Year Completed |
1957 |
Dam Length |
400 |
Dam Height |
20 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
80 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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 138