Lyman Number 5 Reservoir Report
Nearby: Lyman Number 4 Lyman Number 3
Last Updated: December 6, 2025
Lyman Number 5 is a privately owned earth dam located in Jones, South Dakota, with a height of 27 feet and a length of 615 feet.
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Summary
Completed in 1962, this dam has a storage capacity of 61 acre-feet and a maximum discharge rate of 2457 cubic feet per second. It is situated on the TR-Bad River and falls under the jurisdiction of the South Dakota Department of Environment and Natural Resources (DENR), which regulates, inspects, and enforces compliance with state permitting requirements.
Despite being rated as having a low hazard potential and not yet assessed for its condition, Lyman Number 5 serves a vital role in water resource management for the region. The dam plays a crucial role in flood control, irrigation, and water supply, contributing to the overall sustainability of the surrounding area. This infrastructure is essential for maintaining the stability of the ecosystem and ensuring the availability of water resources for both human and environmental needs.
Managed by the Natural Resources Conservation Service, Lyman Number 5 is a key component of the water management infrastructure in South Dakota. While its condition is currently not rated, the dam continues to serve its purpose effectively, safeguarding against potential hazards and providing essential services to the local community. With its strategic location on the TR-Bad River, this dam underscores the importance of sustainable water resource management and climate adaptation efforts in the face of changing environmental conditions.
Year Completed |
1962 |
Dam Length |
615 |
Dam Height |
27 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
61 |
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.
Lyman Number 5