Delzer No.3 Reservoir Report
Nearby: Delzer No.2 Delzer No.1
Last Updated: December 5, 2025
Delzer No.3 is a privately owned earth dam located in Butte, South Dakota, along the Hildibrand Creek.
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Summary
Built in 1974, this dam stands at a height of 23 feet and has a storage capacity of 305 acre-feet. With a low hazard potential and a condition assessment of 'Not Rated', Delzer No.3 plays a crucial role in water resource management in the area.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Delzer No.3 is regulated, permitted, inspected, and enforced by state authorities. With a normal storage capacity of 244 acre-feet, this dam serves as a vital infrastructure for flood control and water supply purposes. Despite not having a designated primary purpose, its strategic location and design make it a key component in the overall water management system of the region.
Although the dam's risk assessment, emergency action plan, and inundation maps are not currently available, the authorities ensure that Delzer No.3 meets safety guidelines and measures. With a maximum discharge capacity of 872 cubic feet per second, this dam is equipped to handle various hydrological challenges while contributing to the sustainable use of water resources in South Dakota.
Year Completed |
1974 |
Dam Length |
897 |
Dam Height |
23 |
River Or Stream |
HILDIBRAND CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
305 |
Hazard Potential |
Low |
Nid Height |
23 |
Seasonal Comparison
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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.
Delzer No.3