Dell Oliver Reservoir Report
Nearby: Pasture 8 Johnson Bros.
Last Updated: December 6, 2025
Dell Oliver, located in Perkins, South Dakota, is a privately owned earth dam completed in 1951 with a height of 19 feet and a storage capacity of 57 acre-feet.
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Summary
It is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and has a low hazard potential. The dam is situated on the TR South Grand River within the St. Paul District of the US Army Corps of Engineers.
Despite its age, Dell Oliver has not been rated for its condition assessment. It lacks emergency action plans and does not meet guidelines for inundation maps and risk assessment. With a maximum discharge of 100 cubic feet per second, the dam serves primarily for water storage and flood control purposes in the region.
Water resource and climate enthusiasts may find Dell Oliver's historical significance and regulatory oversight by the state of South Dakota intriguing. The dam's location, design features, and potential for future risk management measures make it a noteworthy structure to monitor in the context of changing climate patterns and water resource management practices.
Year Completed |
1951 |
Dam Length |
250 |
Dam Height |
19 |
River Or Stream |
TR SOUTH GRAND RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
57 |
Hazard Potential |
Low |
Nid Height |
19 |
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.
Dell Oliver