Herman #15 Reservoir Report
Nearby: Herman Number 18 Herman Number 17
Last Updated: December 13, 2025
Herman #15 is a privately owned dam located in Fort Pierre, South Dakota, along the TR-Bad River.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1958 by the Natural Resources Conservation Service, this earth dam stands at a height of 41 feet and has a storage capacity of 82 acre-feet. With a maximum discharge of 2100 cubic feet per second, the dam serves a vital role in water resource management in the area.
Despite its low hazard potential, Herman #15 is regulated by the South Dakota Department of Environment and Natural Resources, ensuring that it meets all state permitting, inspection, and enforcement requirements. The dam has not been rated for its condition assessment, but it is regularly monitored to ensure its continued safety and functionality. Emergency preparedness measures such as an Emergency Action Plan (EAP) are not currently in place for the dam.
As a key infrastructure for water storage and flood control along the Bad River, Herman #15 plays a crucial role in the local ecosystem and community resilience. Enthusiasts of water resources and climate management will find this dam to be an interesting case study in private ownership and state regulation of critical water infrastructure.
Year Completed |
1958 |
Dam Length |
469 |
Dam Height |
41 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
41 |
Nid Storage |
82 |
Hazard Potential |
Low |
Nid Height |
41 |
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.
Herman #15