Lake Herman Mip #3 Reservoir Report
Nearby: Lake Herman Mip #2 Lake Herman Mip #1
Last Updated: December 13, 2025
Lake Herman Mip #3, located in Lake, South Dakota, is a vital water resource managed by the local government and designed by the USDA NRCS.
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Summary
This earth dam, completed in 1981, stands at a height of 29 feet and has a capacity of 1435 acre-feet. With a normal storage capacity of 660 acre-feet and a drainage area of 11 square miles, the dam plays a crucial role in regulating water flow in the TRIB. LAKE HERMAN tributary.
Despite being classified as a low hazard potential structure with a "Not Rated" condition assessment, Lake Herman Mip #3 is subject to regular state regulation, inspection, and enforcement by the South Dakota Department of Environment and Natural Resources (DENR). The dam's primary purpose and associated structures are not specified, but its importance in flood control and water management for the local area cannot be understated. With a maximum discharge capacity of 1315 cubic feet per second, this dam serves as a key element in the region's water infrastructure.
Managed by the St. Paul District of the US Army Corps of Engineers, Lake Herman Mip #3 remains a crucial component of the water resource management system in South Dakota. As a designated state-regulated structure, its significance in ensuring water safety and security for the surrounding community is evident. The dam's construction by the Natural Resources Conservation Service highlights the collaborative efforts of various agencies in safeguarding water resources and mitigating the impacts of climate change on the region.
Year Completed |
1981 |
Dam Length |
1343 |
Dam Height |
29 |
River Or Stream |
TRIB. LAKE HERMAN |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Drainage Area |
11 |
Nid Storage |
1435 |
Hazard Potential |
Low |
Nid Height |
29 |
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.
Lake Herman Mip #3