E. Hoffman No.9 Reservoir Report
Nearby: E. Hoffman No. 2 E. Hoffman No. 4
Last Updated: December 6, 2025
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Summary
Hoffman No.9, located in Meade, South Dakota, is a privately owned earth dam constructed in 1946 on the TR MOREAU River. With a height of 27 feet and a length of 500 feet, it provides a storage capacity of 135 acre-feet and a maximum discharge rate of 4000 cubic feet per second. Despite its low hazard potential, the dam is regulated by the South Dakota Department of Environment and Natural Resources, ensuring that it meets state inspection, permitting, and enforcement requirements.
This dam plays a crucial role in water resource management in the area, offering flood control and water storage benefits. Although its condition assessment is currently listed as "Not Rated," the dam continues to serve its primary purpose effectively. As a part of the St. Paul District under the US Army Corps of Engineers, E. Hoffman No.9 is a key component of the local water infrastructure, contributing to the overall resilience of the region against climate-related challenges.
With its strategic location and functional design, E. Hoffman No.9 stands as a testament to effective water resource management in South Dakota. As climate change intensifies, structures like this become increasingly vital in safeguarding communities against extreme weather events. By maintaining regulatory compliance and ensuring proper maintenance, this dam remains a cornerstone in the region's efforts to adapt to a changing climate and protect its water resources for future generations.
Year Completed |
1946 |
Dam Length |
500 |
Dam Height |
27 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
135 |
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.
E. Hoffman No.9