Prince & Sons Number 1 Reservoir Report
Last Updated: December 6, 2025
Prince & Sons Number 1 is a privately owned dam located in Fort Pierre, South Dakota, along the Tributary of Lance Creek.
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Summary
Built in 1960 by the Natural Resources Conservation Service, this earth dam stands at a height of 27 feet and has a length of 440 feet, providing a storage capacity of 23 acre-feet. The dam serves as a crucial water resource management structure in the region, with a low hazard potential and a condition assessment that is currently not rated.
Managed by the South Dakota Department of Environment and Natural Resources, Prince & Sons Number 1 is subject to state regulations, permitting, inspection, and enforcement to ensure its safe operation. Although the dam has not been recently inspected, it is designed to meet state standards and is equipped with necessary safety features. With a maximum discharge capacity of 735 cubic feet per second, the dam plays a vital role in controlling water flow and mitigating flood risks in the area.
This dam's strategic location and design highlight its significance in water resource management and climate resilience efforts in South Dakota. As water resource and climate enthusiasts continue to monitor and assess the condition of Prince & Sons Number 1, its role in safeguarding the surrounding community against potential hazards and ensuring sustainable water management practices remains critical.
Year Completed |
1960 |
Dam Length |
440 |
Dam Height |
27 |
River Or Stream |
TRIB. LANCE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
23 |
Hazard Potential |
Low |
Nid Height |
27 |
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.
Prince & Sons Number 1