Jans Herald No.1 Reservoir Report
Nearby: Koskan Laudenslager No. 1
Last Updated: December 13, 2025
Jans Herald No.1 is a privately owned earth dam located in Mellette, South Dakota, along the TRIB BUTTE CREEK OFFSTREAM.
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Summary
Constructed in 1966 by the Natural Resources Conservation Service, this dam stands at a height of 25 feet and has a length of 600 feet. With a storage capacity of 63 acre-feet, it serves as a crucial water resource in the region, holding a normal storage level of 41 acre-feet.
Despite being categorized as a low hazard potential structure, Jans Herald No.1 is regulated by the South Dakota Department of Environment and Natural Resources. It is subject to state permitting, inspection, and enforcement, ensuring its compliance with safety standards and operational efficiency. The dam's condition assessment is currently listed as "Not Rated", highlighting the need for further evaluation to ensure its long-term reliability and resilience in the face of changing climate conditions.
As water resource and climate enthusiasts, it is essential to recognize the importance of maintaining and monitoring structures like Jans Herald No.1. By staying informed about its critical role in water management and potential risks associated with its operation, we can contribute to the sustainable stewardship of our valuable water resources. Continued oversight and investment in infrastructure like Jans Herald No.1 are crucial for safeguarding against the challenges posed by a changing climate and ensuring water security for future generations.
Year Completed |
1966 |
Dam Length |
600 |
Dam Height |
25 |
River Or Stream |
TRIB BUTTE CREEK OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
63 |
Hazard Potential |
Low |
Nid Height |
25 |
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.
Jans Herald No.1