Hoffman Dam Reservoir Report
Nearby: Snavely No. 2 Jim Schuyler
Last Updated: December 13, 2025
Hoffman Dam, located in Tripp, South Dakota, is a privately owned structure designed by Konechne Eng.
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Summary
It was completed in 2007 and stands at a height of 14 feet with a length of 530 feet. The dam has a low hazard potential and a moderate risk assessment rating of 3. It has a storage capacity of 116 acre-feet and serves the primary purpose of water resource management for the TR White River.
This earth dam with a soil foundation is regulated by the South Dakota Department of Environment and Natural Resources (DENR), which oversees its permitting, inspection, and enforcement processes. The dam features an uncontrolled spillway with a width of 80 feet and is situated within the St. Paul District of the US Army Corps of Engineers. Despite not having a condition assessment rating, the dam is considered to be in good standing and has not been rated for emergency action preparedness.
Water resource and climate enthusiasts interested in the Hoffman Dam can appreciate its role in managing water resources for the Tripp area. With its moderate risk assessment and low hazard potential, the dam provides essential storage for the TR White River while adhering to state regulatory standards. As a relatively new structure, Hoffman Dam stands as a testament to effective engineering design and construction practices in ensuring water security for the local community.
Year Completed |
2007 |
Dam Length |
530 |
Dam Height |
14 |
River Or Stream |
TR WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Drainage Area |
1 |
Nid Storage |
116 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
White R Near Oacoma Sd
|
105cfs |
Keya Paha R Near Keyapaha Sd
|
33cfs |
Keya Paha R At Wewela Sd
|
54cfs |
White River Near White River
|
42cfs |
Platte Creek Near Platte
|
3cfs |
Little White R Below White River Sd
|
141cfs |
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.
Hoffman Dam