Krogman Harold No.1 Reservoir Report
Nearby: Adrian #2 Krogman Harold No.3
Last Updated: December 8, 2025
Krogman Harold No.1 is a privately owned dam located in Mellette, South Dakota.
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Summary
Built in 1968, this earth dam stands at a height of 27 feet and has a length of 255 feet. It serves as a critical structure on the TR Little White Offstream river, providing storage for water resources in the region. With a normal storage capacity of 18 acre-feet, the dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment.
Managed by the Natural Resources Conservation Service, Krogman Harold No.1 is regulated by the South Dakota Department of Environment and Natural Resources. The dam has state jurisdiction and is subject to permitting, inspection, and enforcement by the regulatory agency. While no associated structures or spillways are listed, the dam has a maximum discharge capacity of 165 cubic feet per second. Despite not having a current condition assessment, the dam's hazard potential is considered low, highlighting its importance for water resource management and climate resilience efforts in the area.
In the event of an emergency, the dam's emergency action plan status, inundation maps, and risk assessment details are not provided. However, with its strategic location and vital role in water storage, Krogman Harold No.1 stands as a key infrastructure for the St. Paul District and the broader water resource management efforts in South Dakota. As water resource and climate enthusiasts, understanding the significance of dams like Krogman Harold No.1 is crucial for ensuring sustainable water management practices and climate adaptation strategies in the face of changing environmental conditions.
Year Completed |
1968 |
Dam Length |
255 |
Dam Height |
27 |
River Or Stream |
TR LITTLE WHITE OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
27 |
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.
Krogman Harold No.1