Adrian #1 Reservoir Report
Nearby: Krogman #5 Deiss Dam
Last Updated: December 8, 2025
Adrian #1 is a privately owned dam located in Mellette, South Dakota.
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Summary
Constructed in 1945, this Earth-type dam stands at 29 feet high and spans 695 feet in length, providing a storage capacity of 38 acre-feet. Situated on TR Pine Creek offstream, this structure is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and is subject to state permitting, inspection, and enforcement requirements. Despite its low hazard potential and current "Not Rated" condition assessment, the dam has not been evaluated for emergency action planning or risk assessment.
Managed by a private owner, Adrian #1 plays a crucial role in water resource management in the region, with a normal storage capacity of 33 acre-feet and a maximum discharge of 169 cubic feet per second. The dam's location in a predominantly agricultural area underscores its importance in irrigation and flood control. Although the dam has not been modified since its construction, its compliance with state regulations and inspection requirements ensures its ongoing safety and functionality.
As a part of the St. Paul District of the US Army Corps of Engineers, Adrian #1 is a significant structure in the area, serving its primary purpose of water storage and management effectively. With its vintage construction and state-regulated oversight, this dam stands as a testament to the importance of maintaining and monitoring critical infrastructure for water resources and climate resilience.
Year Completed |
1945 |
Dam Length |
695 |
Dam Height |
29 |
River Or Stream |
TR PINE CREEK OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Nid Storage |
38 |
Hazard Potential |
Low |
Nid Height |
29 |
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.
Adrian #1