Weller No.1 Reservoir Report
Nearby: Sd Noname 172 Sd Noname 171
Last Updated: December 6, 2025
Weller No.1, located in Jackson, South Dakota, is a privately owned earth dam completed in 1948 to regulate the flow of the TR-Bad River.
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Summary
With a height of 17 feet and a length of 1400 feet, this dam has a storage capacity of 160 acre-feet, providing essential water resource management in the area. The dam is under the regulatory oversight of the South Dakota Department of Environment and Natural Resources, ensuring that it meets state permitting, inspection, and enforcement standards.
Managed by the Natural Resources Conservation Service, Weller No.1 has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. While lacking specific details on emergency action plans and risk assessments, the dam plays a crucial role in mitigating flood risks and providing water storage for the surrounding area. With a maximum discharge capacity of 8150 cubic feet per second, Weller No.1 serves as a vital infrastructure for maintaining water resources in South Dakota.
Despite its age, Weller No.1 continues to be a reliable structure for water resource management in the region. As climate change impacts water availability and patterns, the importance of well-maintained dams like Weller No.1 becomes even more critical. The collaboration between private owners, state regulators, and federal agencies ensures that this earth dam remains effective in its primary purpose of regulating the flow of the TR-Bad River and safeguarding the local community from potential water-related hazards.
Year Completed |
1948 |
Dam Length |
1400 |
Dam Height |
17 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
17 |
Nid Storage |
160 |
Hazard Potential |
Low |
Nid Height |
17 |
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.
Weller No.1