Pere Pearson 1 Reservoir Report
Nearby: Palmer Pearson No.2 Kroetch Dam
Last Updated: December 5, 2025
Pere Pearson 1 is a privately owned earth dam located in Haakon, South Dakota, along the TR-Cheyenne River.
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Summary
This dam, completed in 1955, stands at 20 feet high and has a storage capacity of 128 acre-feet. With a maximum discharge rate of 1500 cubic feet per second, it plays a crucial role in regulating water flow and ensuring water security in the region.
Managed by the Natural Resources Conservation Service, Pere Pearson 1 is classified as having a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. While the dam is state-regulated and meets various oversight requirements such as permitting, inspection, and enforcement, there are no associated structures or emergency action plans in place as of the latest data update in May 2021.
For water resource and climate enthusiasts, Pere Pearson 1 presents an intriguing case study in dam infrastructure and management. Its location along the Cheyenne River, combined with its historical significance and operational characteristics, make it a focal point for understanding water resource dynamics and the interconnectedness of human actions with natural systems. Further research and monitoring of Pere Pearson 1 could provide valuable insights into sustainable water management practices and resilience in the face of changing climate conditions.
Year Completed |
1955 |
Dam Length |
500 |
Dam Height |
20 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
128 |
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.
Pere Pearson 1