Herman #12 Reservoir Report
Nearby: Osborne Number 3 Herman #11
Last Updated: December 13, 2025
Herman #12 is a privately owned dam located in Fort Pierre, South Dakota, along the TR-Bad River.
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Summary
Built in 1959, this earth dam stands at a height of 29 feet and has a storage capacity of 53 acre-feet. Despite its low hazard potential, the dam is regulated by the South Dakota Department of Environment and Natural Resources, with regular inspections and enforcement measures in place to ensure its safety and compliance with state regulations.
Managed by the Natural Resources Conservation Service, Herman #12 plays a crucial role in water resource management in the area, providing irrigation and flood control benefits to the surrounding region. With a maximum discharge capacity of 882 cubic feet per second, this dam serves as a vital infrastructure for maintaining stable water levels and protecting downstream areas during periods of heavy rainfall or snowmelt. While the dam's condition assessment is currently labeled as "Not Rated," ongoing measures are in place to monitor and maintain its structural integrity.
Overall, Herman #12 stands as a testament to the importance of sustainable water resource management in the face of changing climate patterns. As a key component of the local water infrastructure, this dam highlights the need for proactive monitoring and maintenance to ensure the safety and efficiency of water resource systems in the region. With its low hazard potential and state-regulated status, Herman #12 serves as a crucial asset for water management in South Dakota, contributing to the resilience of the local ecosystem and community.
Year Completed |
1959 |
Dam Length |
369 |
Dam Height |
29 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Nid Storage |
53 |
Hazard Potential |
Low |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bad R Near Fort Pierre Sd
|
7cfs |
White River Near White River
|
42cfs |
Little White R Below White River Sd
|
141cfs |
Black Pipe Creek Nr Belvidere
|
2cfs |
White R Near Oacoma Sd
|
105cfs |
White R Near Kadoka Sd
|
73cfs |
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.
Herman #12