Summary
Calhoun is a privately owned dam located in Hughes, South Dakota, with a low hazard potential. Built in 1954, this earth dam stands at 13 feet tall and spans 450 feet in length, providing a maximum storage capacity of 59 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular inspections, permitting, and enforcement to ensure its safety and compliance with state regulations.
Managed by the Natural Resources Conservation Service, H.C. Calhoun serves a crucial role in water resource management in the region. With a normal storage capacity of 16 acre-feet and a maximum discharge capability of 900 cubic feet per second, this dam plays a vital role in flood control and water supply for the surrounding area. Despite not being rated for its condition assessment, the dam continues to fulfill its purpose effectively while meeting state jurisdiction requirements and serving as a valuable asset for the community.
Overall, H.C. Calhoun stands as a significant infrastructure for water resource and climate enthusiasts in South Dakota. With its historical significance dating back to the 1950s and its continued operation under state regulation, this dam showcases a balance between human development and environmental stewardship. As a low-hazard structure with a key role in water management, H.C. Calhoun embodies the importance of sustainable infrastructure for addressing the challenges of water resources and climate change in the region.
Year Completed |
1954 |
Dam Length |
450 |
Dam Height |
13 |
River Or Stream |
MISSONot RatedI RIVER TRIB OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
59 |
Hazard Potential |
Low |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bad R Near Fort Pierre Sd
|
7cfs |
White R Near Oacoma Sd
|
105cfs |
White River Near White River
|
42cfs |
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.
H.C. Calhoun