Herman #11 Reservoir Report
Nearby: Herman #12 Osborne Number 3
Last Updated: December 13, 2025
Herman #11 is a private earth dam located in Jones, South Dakota, along the TR-Bad River.
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Summary
Constructed in 1960 by the Natural Resources Conservation Service, this dam stands at a height of 24 feet and has a storage capacity of 161 acre-feet. With a low hazard potential and a condition assessment of "Not Rated," Herman #11 plays a crucial role in water resource management in the region.
Despite its age, Herman #11 remains state-regulated, with inspections, permitting, and enforcement overseen by the South Dakota Department of Environment and Natural Resources. The dam's purpose and associated structures are not specified, but its importance in flood control and water storage cannot be understated. With a maximum discharge capacity of 2,268 cubic feet per second, Herman #11 serves as a key infrastructure for managing water resources in the area.
As climate change continues to impact water availability and extreme weather events, structures like Herman #11 become increasingly vital for maintaining water security and mitigating flood risks. The dam's location in Fort Pierre, South Dakota, underscores its importance in protecting communities and ecosystems along the TR-Bad River. With ongoing monitoring and management, Herman #11 stands as a testament to the crucial role of dams in adapting to a changing climate and safeguarding water resources for future generations.
Year Completed |
1960 |
Dam Length |
789 |
Dam Height |
24 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
24 |
Nid Storage |
161 |
Hazard Potential |
Low |
Nid Height |
24 |
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 #11