Jordan Dam 2 Reservoir Report
Nearby: Lower Jordan Dam Merlin Mader Dam 1
Last Updated: December 6, 2025
Jordan Dam 2, located in Sioux County, Nebraska, is a privately owned earth dam built in 1941 for irrigation purposes on Antelope Creek.
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Summary
Standing at 33 feet high with a hydraulic height of 25 feet, the dam has a storage capacity of 1580 acre-feet, serving the surrounding area with its normal storage capacity of 818 acre-feet. Despite its low hazard potential, the dam is in poor condition as of the last inspection in July 2018, with a scheduled inspection frequency of every 5 years.
Managed by the Nebraska Department of Natural Resources, Jordan Dam 2 is regulated, permitted, inspected, and enforced by the state. The dam is located in a rural area, 17 miles from Ardmore, South Dakota, and falls under the jurisdiction of the Omaha District of the US Army Corps of Engineers. While the dam does not have any associated structures or outlet gates, it plays a crucial role in providing irrigation water for agricultural needs in the region.
Despite its age and current condition assessment, Jordan Dam 2 remains a vital component of the local water resource infrastructure, ensuring water supply for irrigation purposes in the area. With its historical significance dating back to the early 1940s, the dam continues to serve its primary purpose effectively, highlighting the importance of proper maintenance and periodic inspections to ensure its long-term functionality and safety for the community.
Year Completed |
1941 |
Dam Length |
2225 |
Dam Height |
33 |
River Or Stream |
ANTELOPE CREEK |
Primary Dam Type |
Earth |
Surface Area |
157 |
Hydraulic Height |
25 |
Drainage Area |
1 |
Nid Storage |
1580 |
Structural Height |
33 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
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.
Jordan Dam 2