Steve Perry Dam Reservoir Report
Nearby: Valbnot Ratedg #1 Hendricks Number 4
Last Updated: December 13, 2025
Steve Perry Dam, located in Lyman, South Dakota, is a privately owned structure that plays a crucial role in water resource management in the region.
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Summary
Completed in 1997, this earth dam stands at a height of 26 feet and has a storage capacity of 37 acre-feet, providing essential water storage for the surrounding area. Situated on Williams Creek, the dam is regulated by the South Dakota Department of Environment and Natural Resources to ensure its safety and compliance with state regulations.
With a low hazard potential and a current condition assessment of "Not Rated," Steve Perry Dam serves as a reliable infrastructure for flood control and water supply management. The dam has a maximum discharge capacity of 540 cubic feet per second, further enhancing its role in mitigating potential flooding events in the area. While the dam's emergency action plan and risk assessment details are not currently available, its operational status and inspection frequency ensure its continued functionality and safety for the community.
Managed by private owners and located within the St. Paul District of the US Army Corps of Engineers, Steve Perry Dam demonstrates the collaborative efforts between private entities and government agencies in maintaining essential water infrastructure. As climate change continues to impact water resources, structures like Steve Perry Dam play a vital role in ensuring water security and resilience in the face of evolving environmental challenges.
Year Completed |
1997 |
Dam Length |
200 |
Dam Height |
26 |
River Or Stream |
WILLIAMS CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Drainage Area |
1 |
Nid Storage |
37 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
White River Near White River
|
42cfs |
Little White R Below White River Sd
|
141cfs |
White R Near Oacoma Sd
|
105cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
Little White R Near Rosebud Sd
|
96cfs |
Keya Paha R Near Keyapaha Sd
|
33cfs |
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.
Steve Perry Dam