Byre Dam Reservoir Report
Nearby: Dorman Dam Lee Anderson
Last Updated: December 12, 2025
Byre Dam, located in Lyman, South Dakota, on Grouse Creek, stands as a pivotal structure managed by the local government to regulate water resources in the region.
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Summary
Completed in 1940, this earth dam stands at a height of 27 feet with a length of 1040 feet, offering a storage capacity of 2288 acre-feet. The dam is designed to handle a maximum discharge of 9500 cubic feet per second, ensuring effective flood control measures for the surrounding area.
With a significant hazard potential, Byre Dam undergoes regular inspections to ensure its structural integrity and safety. The dam is regulated, permitted, inspected, and enforced by the South Dakota Department of Agriculture and Natural Resources to meet state standards and guidelines. Despite being classified as "Not Rated" in terms of its condition assessment, efforts are made to maintain the dam and ensure its functionality in emergency situations. Byre Dam plays a crucial role in managing water resources and mitigating flood risks in the region, highlighting its importance for water resource and climate enthusiasts.
Year Completed |
1940 |
Dam Length |
1040 |
Dam Height |
27 |
River Or Stream |
GROUSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Drainage Area |
37 |
Nid Storage |
2288 |
Hazard Potential |
Significant |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
White R Near Oacoma Sd
|
105cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
White River Near White River
|
42cfs |
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.
Byre Dam