Peno Grazing Association Reservoir Report
Nearby: Veryl Schroeder 1 Sd Noname 178
Last Updated: December 6, 2025
The Peno Grazing Association in Pennington, South Dakota, is a privately owned dam structure that was completed in 1952.
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Summary
This earth dam, with a height of 25 feet and a length of 700 feet, serves the primary purpose of water resource management for the TR-CHEYENNE river or stream. Managed by the Natural Resources Conservation Service, the dam has a storage capacity of 210 acre-feet, with a normal storage level of 146 acre-feet and a maximum discharge capacity of 3000 cubic feet per second.
Despite being classified as having a low hazard potential, the condition of the Peno Grazing Association dam is currently not rated. The dam is regulated by the South Dakota Department of Environment and Natural Resources, with state permitting, inspection, and enforcement procedures in place. While the dam has not been assigned an Emergency Action Plan (EAP) or undergone recent risk assessments, it remains a crucial infrastructure for water supply and climate management in the region. Enthusiasts interested in water resources and climate change in South Dakota may find the Peno Grazing Association dam a fascinating case study of private ownership and state regulation in water infrastructure.
Year Completed |
1952 |
Dam Length |
700 |
Dam Height |
25 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
210 |
Hazard Potential |
Low |
Nid Height |
25 |
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.
Peno Grazing Association