Antelope Reservoir Report
Nearby: Greely Dam Hicks Canyon Dam
Last Updated: December 13, 2025
Antelope is a vital irrigation structure located in Danner, Oregon, serving the Malheur County area.
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Summary
Built in 1923, this earth dam stands at a height of 60 feet and has a storage capacity of 70,000 acre-feet. The dam spans 850 feet and helps control water from the Jack, Antelope, and Jordan Creek rivers for agricultural purposes in the region.
Managed by the Natural Resources Conservation Service, Antelope Dam is regulated by the Oregon Water Resources Department and undergoes regular inspections to ensure its safety and functionality. With a high hazard potential due to its condition assessment of satisfactory, the dam features Needle outlet gates and a spillway type that is not specified. It is crucial for water resource and climate enthusiasts to monitor the condition and maintenance of Antelope Dam to prevent any potential risks or emergencies.
Despite its age, Antelope Dam continues to play a crucial role in irrigation and water management in Malheur County, Oregon. With its strategic location along multiple rivers and streams, the dam provides essential water resources for agriculture and other purposes in the region. As climate change impacts water availability, the importance of maintaining and monitoring structures like Antelope Dam becomes increasingly evident for the sustainable management of water resources in the area.
Year Completed |
1923 |
Dam Length |
850 |
Dam Height |
56 |
River Or Stream |
JACK, ANTELOPE, & JORDAN CREEK |
Primary Dam Type |
Earth |
Surface Area |
2731 |
Hydraulic Height |
54 |
Drainage Area |
52.5 |
Nid Storage |
70000 |
Structural Height |
60 |
Outlet Gates |
Needle |
Hazard Potential |
High |
Nid Height |
60 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Owyhee River Nr Rome Or
|
189cfs |
Ef Owyhee River At Crutcher Crossing
|
47cfs |
Snake River Nr Murphy Id
|
6650cfs |
Owyhee River Below Owyhee Dam Or
|
30cfs |
Dixie Drain Nr Wilder Id
|
52cfs |
Boise River At Caldwell
|
519cfs |
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.
Antelope