Lake Herman Mip #2 Reservoir Report
Nearby: Lake Herman Mip #1 Lake Herman Mip #3
Last Updated: December 14, 2025
Lake Herman Mip #2 is a vital water resource located in Lake, South Dakota, with a dam completed in 1980 by the USDA NRCS.
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Summary
This earth dam stands at a height of 21 feet and has a storage capacity of 475 acre-feet, serving the primary purpose of water management in the area. The dam regulates the flow of the TRIB. LAKE HERMAN tributary, ensuring a maximum discharge of 1080 cubic feet per second to prevent flooding and maintain water quality for the surrounding community.
Owned and regulated by the local government, Lake Herman Mip #2 is under the jurisdiction of the DENR in South Dakota. Despite being rated as low hazard potential and not having a current condition assessment, the dam plays a crucial role in water conservation efforts in the region. With a normal storage capacity of 290 acre-feet and a drainage area of 2 square miles, the dam contributes to the overall water management infrastructure in the St. Paul District.
The dam's emergency action plan status, risk assessment, and management measures are currently not rated or documented, suggesting a need for further evaluation and preparedness measures. As climate change continues to impact water resources and infrastructure, the importance of maintaining and assessing structures like Lake Herman Mip #2 becomes increasingly crucial for sustainable water management practices in South Dakota.
Year Completed |
1980 |
Dam Length |
980 |
Dam Height |
21 |
River Or Stream |
TRIB. LAKE HERMAN |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Drainage Area |
2 |
Nid Storage |
475 |
Hazard Potential |
Low |
Nid Height |
21 |
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 #2