Summary
Mahaffey is a privately owned Earth dam completed in 1948 on the TR CHEYENNE river. With a height of 26 feet and a length of 550 feet, this dam has a storage capacity of 126 acre-feet, providing essential water resource management for the surrounding area. Despite being classified as having low hazard potential, the dam is regulated by the South Dakota Department of Agriculture and Natural Resources, with regular inspections and enforcement to ensure its safety and compliance.
Although T. Mahaffey has not been rated for its condition as of yet, it is subject to inspection and maintenance protocols to uphold its structural integrity. The dam's primary purpose and associated structures are not specified, but its storage capacity and discharge capabilities play a crucial role in flood control and water supply management. Even though it has not undergone significant modifications since its completion, T. Mahaffey remains a key component in the water infrastructure of the St. Paul District, providing valuable support to the local community and ecosystem.
With a history dating back to the mid-20th century, T. Mahaffey stands as a testament to the importance of water resource management and climate resilience in the region. As climate change continues to impact water availability and quality, the role of dams like T. Mahaffey in regulating and storing water becomes increasingly vital. By adhering to state regulations and undertaking regular inspections, T. Mahaffey ensures the safety of its surrounding area and contributes to sustainable water resource management practices in South Dakota.
Year Completed |
1948 |
Dam Length |
550 |
Dam Height |
26 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Drainage Area |
1 |
Nid Storage |
126 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cheyenne R Near Plainview Sd
|
0cfs |
Moreau R Near Faith Sd
|
14cfs |
Belle Fourche River Near Elm Springs
|
17900cfs |
Elk Cr Near Elm Springs Sd
|
0cfs |
Cheyenne River Near Wasta
|
190cfs |
Belle Fourche R Near Sturgis Sd
|
34cfs |
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.
T. Mahaffey