Pettegrew Pond No.2 Reservoir Report
Last Updated: December 6, 2025
Pettegrew Pond No.2, located in Fall River, South Dakota, is a privately owned earth dam that was completed in 1945.
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Summary
This dam, standing at a height of 13 feet with a length of 700 feet, serves the primary purpose of regulating the flow of the TR Cheyenne river. With a storage capacity of 62 acre-feet, the pond plays a crucial role in managing water resources in the area, especially during periods of high discharge when it can handle up to 280 cubic feet per second.
Managed by the Natural Resources Conservation Service, Pettegrew Pond No.2 is regulated by the South Dakota Department of Environment and Natural Resources, ensuring that it meets state inspection and enforcement standards. Despite being rated as having low hazard potential and not having a current condition assessment, the pond provides essential water storage and flood control benefits to the region. Climate enthusiasts and water resource experts can appreciate the historical significance and ongoing importance of this structure in maintaining a sustainable water supply for local communities.
With its strategic location and vital role in water management, Pettegrew Pond No.2 stands as a testament to the importance of responsible dam construction and maintenance in the face of changing climate patterns. As discussions around climate resilience and water security continue to gain prominence, this pond serves as a tangible example of how infrastructure can adapt to meet the challenges of a changing environment. For enthusiasts passionate about water resources and climate adaptation, Pettegrew Pond No.2 offers a case study in the intersection of human-made structures and natural systems, highlighting the ongoing need for sustainable water management practices in the face of a changing climate.
Year Completed |
1945 |
Dam Length |
700 |
Dam Height |
13 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
62 |
Hazard Potential |
Low |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Horsehead Cr At Oelrichs Sd
|
0cfs |
Hat Cr Near Edgemont Sd
|
0cfs |
Cheyenne R Below Angostura Dam Sd
|
2cfs |
White R Nr Ne-Sd State Line
|
10cfs |
White R Near Oglala Sd
|
101cfs |
Fall R At Hot Springs Sd
|
31cfs |
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.
Pettegrew Pond No.2