Collins Dam Reservoir Report
Nearby: W. Holmes No.3 W. Holmes No.2
Last Updated: December 6, 2025
Collins Dam, located in Ziebach, South Dakota, is a privately owned structure that was completed in 2000 by USDA NRCS.
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Summary
This earth dam stands at a height of 32 feet and spans 440 feet along TR. Cottonwood Creek. With a maximum storage capacity of 41 acre-feet and a normal storage capacity of 34 acre-feet, Collins Dam plays a crucial role in regulating water flow and providing irrigation to the surrounding area.
Despite its low hazard potential, Collins Dam is subject to state regulation, inspection, and enforcement by DANR in South Dakota. The spillway, with a width of 40 feet, is uncontrolled, allowing for excess water to flow out in the event of heavy rainfall or flooding. The risk assessment for this dam is rated as moderate, highlighting the importance of ongoing monitoring and maintenance to ensure its structural integrity and continued functionality in the face of changing climate conditions.
With its strategic location and design, Collins Dam serves as a vital water resource infrastructure in South Dakota, contributing to the management of water resources in the region. As climate change impacts water availability and variability, the maintenance and upkeep of dams like Collins become increasingly essential in safeguarding communities against potential risks and ensuring sustainable water management practices for the future.
Year Completed |
2000 |
Dam Length |
440 |
Dam Height |
32 |
River Or Stream |
TR. COTTONWOOD CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
32 |
Nid Storage |
41 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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.
Collins Dam