Robert Calkinsor Reservoir Report
Last Updated: December 13, 2025
Robert Calkinsor is a privately-owned dam located in Fort Pierre, South Dakota, along the tributary of the Bad River.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1966, this earth dam stands at a height of 22 feet and stretches 525 feet in length, with a storage capacity of 64 acre-feet. Managed by the Natural Resources Conservation Service, this dam is regulated by the South Dakota Department of Environment and Natural Resources, with state permitting, inspection, and enforcement in place.
Despite its low hazard potential and "Not Rated" condition assessment, Robert Calkinsor plays a vital role in water resource management in the region, providing flood control and water storage benefits. The dam has a maximum discharge capacity of 588 cubic feet per second and a normal storage capacity of 35 acre-feet. While the dam's emergency action plan status and risk assessment details are not available, its presence contributes to the overall resilience of the local water infrastructure.
As a key structure in the water management system of Stanley County, South Dakota, Robert Calkinsor offers valuable insights for water resource and climate enthusiasts. With its historical significance and ongoing regulatory oversight, this dam showcases the importance of private ownership in maintaining critical infrastructure for flood control, water storage, and environmental protection in the region.
Year Completed |
1966 |
Dam Length |
525 |
Dam Height |
22 |
River Or Stream |
TRIB. BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
64 |
Hazard Potential |
Low |
Nid Height |
22 |
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.
Robert Calkinsor