Archie Millard #2 Reservoir Report
Nearby: Emil Schulz Velda Ramser Dam
Last Updated: December 13, 2025
Archie Millard #2 is a privately owned earth dam located in Lyman, South Dakota, along the TRIB-WHITE RIVER.
°F
°F
mph
Wind
%
Humidity
Summary
Completed in 1968, this dam stands at a height of 26 feet and has a storage capacity of 27 acre-feet. With a low hazard potential and a condition assessment of "Not Rated," this dam plays a crucial role in water resource management in the area.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Archie Millard #2 is regulated and inspected regularly to ensure its structural integrity and safe operation. Despite not having an official emergency action plan (EAP) in place, this dam is equipped with necessary safety measures and emergency contacts. With the potential to discharge up to 1680 cubic feet per second, this dam serves as a vital component in flood control and water supply management in the region.
Situated within the St. Paul District of the US Army Corps of Engineers, Archie Millard #2 is a key infrastructure supporting the local community and ecosystem. With its strategic location and design, this dam exemplifies the intersection of water resource management and climate resilience, showcasing the importance of sustainable infrastructure in mitigating the impacts of extreme weather events and ensuring water security for future generations.
Year Completed |
1968 |
Dam Length |
410 |
Dam Height |
26 |
River Or Stream |
TRIB-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
27 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
White R Near Oacoma Sd
|
105cfs |
White River Near White River
|
42cfs |
Little White R Below White River Sd
|
141cfs |
Keya Paha R Near Keyapaha Sd
|
33cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
Keya Paha R At Wewela Sd
|
54cfs |
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.
Archie Millard #2