Oil Well Dam No.2 Reservoir Report
Nearby: Oil Well Dam No.1 Trout Dam
Last Updated: December 6, 2025
Oil Well Dam No.2, located in Fall River, South Dakota, plays a crucial role in water resource management for the region.
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Summary
Built in 1949, this earth dam stands at a height of 15 feet and has a storage capacity of 360 acre-feet, providing essential water for irrigation and other purposes. The dam, situated on Horsehead Creek Tributary, is regulated by the South Dakota Department of Environment and Natural Resources, ensuring proper inspection, permitting, and enforcement measures are in place to maintain its integrity.
With a low hazard potential and a moderate risk assessment rating, Oil Well Dam No.2 is deemed safe for the surrounding community. Although the dam's condition is currently not rated, regular inspections and emergency action plans are in place to address any unforeseen events. The spillway, with a width of 100 feet, is designed for uncontrolled discharge, ensuring efficient water flow during periods of high precipitation. Overall, Oil Well Dam No.2 serves as a vital infrastructure for water resource management in the area, with measures in place to mitigate any potential risks and ensure the safety of the community and environment.
Year Completed |
1949 |
Dam Length |
1000 |
Dam Height |
15 |
River Or Stream |
HORSEHEAD CREEK TRIB |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
360 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Oil Well Dam No.2