Halverson Dam Reservoir Report
Nearby: Dejong Bros. 12 Dejongs Bros. 8
Last Updated: December 13, 2025
Halverson Dam, located in Lyman, South Dakota, is a privately owned earth dam completed in 2004 with a height of 17 feet and a storage capacity of 187 acre-feet.
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Summary
The dam, designed by USDA NRCS, regulates the flow of the TR. White River and has a low hazard potential with a moderate risk assessment rating. Despite being not rated for condition assessment, the dam is state-regulated, inspected, and enforced by the South Dakota Department of Agriculture and Natural Resources.
The dam features an uncontrolled spillway with a width of 50 feet and has no outlet gates. It stands as a vital structure in managing water resources in the region, providing flood control and water storage for agricultural and environmental purposes. With a maximum discharge capacity of 675 cubic feet per second, Halverson Dam plays a crucial role in mitigating the risk of flooding and ensuring water security in the area.
Dusty Johnson (R) represents the St. Paul District where the dam is located, emphasizing the importance of proper management and maintenance of this essential infrastructure. As climate change continues to impact water resources, the presence of well-regulated dams like Halverson Dam becomes increasingly crucial in ensuring the resilience and sustainability of water systems in South Dakota.
Year Completed |
2004 |
Dam Length |
325 |
Dam Height |
17 |
River Or Stream |
TR. WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
17 |
Drainage Area |
1 |
Nid Storage |
187 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
White R Near Oacoma Sd
|
105cfs |
White River Near White River
|
42cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
Little White R Below White River Sd
|
141cfs |
Keya Paha R Near Keyapaha Sd
|
33cfs |
Platte Creek Near Platte
|
3cfs |
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.
Halverson Dam