Krogman #4 Reservoir Report
Nearby: Krogman No.1 Deiss No. 1
Last Updated: December 8, 2025
Krogman #4 is a privately owned earth dam located in Mellette, South Dakota, with a primary purpose that remains unspecified.
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Summary
Completed in 1960, this dam stands at a height of 29 feet and has a storage capacity of 185 acre-feet. It spans a length of 550 feet and is regulated by the South Dakota Department of Environment and Natural Resources.
Situated on TR DRY CREEK, Krogman #4 is under the jurisdiction of the St. Paul District of the US Army Corps of Engineers. With a low hazard potential and a condition assessment that is currently not rated, this structure has not been inspected recently, and its emergency action plan status and risk assessment are also unknown. The dam's maximum discharge capacity is reported at 870 cubic feet per second.
Despite lacking certain key data points, Krogman #4 is an intriguing water resource structure that warrants further investigation for climate and water resource enthusiasts. Its role in managing water flow and storage on TR DRY CREEK highlights the importance of understanding and monitoring the condition and safety of such critical infrastructure in the face of evolving climate conditions and water resource management challenges.
Year Completed |
1960 |
Dam Length |
550 |
Dam Height |
29 |
River Or Stream |
TR DRY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Nid Storage |
185 |
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.
Krogman #4