Horman Dam Reservoir Report
Nearby: H.G. Horman Dam No.1 Guidinger Dam
Last Updated: December 5, 2025
Horman Dam, located in Butte, South Dakota, is a private-owned structure that serves as a vital water resource in the region.
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Summary
Built in 1969, this earth-type dam stands at a height of 27 feet and has a storage capacity of 400 acre-feet, with a normal storage level of 225 acre-feet. Situated on the tributary of Indian Creek, the dam plays a crucial role in managing water flow, with a maximum discharge rate of 4160 cubic feet per second.
Although the dam is classified as having a low hazard potential, it is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular state inspections and enforcement measures to ensure its structural integrity and safety. While the condition assessment of the dam is currently marked as "Not Rated," efforts are made to meet emergency preparedness guidelines, although specific dates for emergency action plans and risk assessments are yet to be disclosed. The dam's location and design, along with its operational history, make it an essential component in water resource management for the region's climate and environmental enthusiasts.
Year Completed |
1969 |
Dam Length |
1175 |
Dam Height |
27 |
River Or Stream |
TRIB. INDIAN CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
400 |
Hazard Potential |
Low |
Nid Height |
27 |
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.
Horman Dam
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