Berry Dam Reservoir Report
Nearby: Corn Creek Dam Anderson #1
Last Updated: December 7, 2025
Berry Dam, located in Mellette, South Dakota, is a state-regulated earth dam on Langston Creek with a height of 50 feet and a length of 200 feet.
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Summary
Completed in 1985, this dam has a storage capacity of 250 acre-feet and a maximum discharge of 1500 cubic feet per second. The dam serves a significant hazard potential and its condition assessment is currently rated as "Not Rated."
Owned by the state of South Dakota, Berry Dam falls under the jurisdiction of the South Dakota Department of Environment and Natural Resources (DENR). While the dam is not rated for its condition, it is regularly inspected, permitted, and enforced by the state agency, ensuring its safety and compliance with regulations. The dam has not been modified in recent years and does not have an Emergency Action Plan (EAP) in place, indicating a need for preparedness measures in case of emergencies.
As an essential water resource structure in the region, Berry Dam plays a crucial role in water management and flood control on Langston Creek. With its significant hazard potential and state-regulated status, it is important for water resource and climate enthusiasts to stay informed about the condition and management of this dam to ensure the safety of the surrounding community and environment.
Year Completed |
1985 |
Dam Length |
200 |
Dam Height |
50 |
River Or Stream |
LANGSTON CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
50 |
Nid Storage |
250 |
Hazard Potential |
Significant |
Nid Height |
50 |
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.
Berry Dam