Summary
Built in 1958 by the Natural Resources Conservation Service, the dam stands at 32 feet high and spans 459 feet in length, with a storage capacity of 42 acre-feet. Despite its low hazard potential and current "Not Rated" condition assessment, the dam is regulated, inspected, and enforced by the South Dakota Department of Environment and Natural Resources to ensure its safety and compliance with state regulations.
Owned and operated by a private entity, Herman #9 serves various purposes within the local water resource management system, although specifics on its primary purpose are not provided. The dam has a maximum discharge capacity of 1050 cubic feet per second and is equipped with an outlet gate system. While the dam's emergency action plan status and risk assessment details are unspecified, its low hazard potential suggests that it poses minimal threat to downstream communities in the event of a breach or failure.
Located in Jones County, South Dakota, Herman #9 plays a crucial role in water management along the TR-BAD River, contributing to flood control, irrigation, and water supply in the region. With its historical significance dating back to the late 1950s, the dam continues to be a part of the local infrastructure maintained and monitored by state regulatory agencies to ensure public safety and environmental protection in the face of changing climate conditions and water resource challenges.
Year Completed |
1958 |
Dam Length |
459 |
Dam Height |
32 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
32 |
Nid Storage |
42 |
Hazard Potential |
Low |
Nid Height |
32 |
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 #9