Antelope Flat (Crook) Reservoir Report
Nearby: Bear Creek (Crook) Kluchman Creek Dam
Last Updated: December 6, 2025
Antelope Flat (Crook) is a privately owned irrigation dam located in Crook, Oregon, specifically in the city of Prineville.
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Summary
Completed in 1965, this earth dam stands at a height of 33 feet and has a maximum storage capacity of 2000 acre-feet, with a normal storage level of 1793 acre-feet. The dam serves the primary purpose of irrigation, with its reservoir covering a surface area of 171.6 acres and draining a 7.3 square mile watershed that includes Bear & Faught Creeks and two tributaries.
Managed by the Oregon Water Resources Department, Antelope Flat (Crook) is subject to state regulation, inspection, and enforcement to ensure its safety and compliance with standards. Despite its low hazard potential and a lack of current condition assessment rating, the dam is equipped with needle outlet gates for water release. The last inspection was conducted in August 2017, with inspections scheduled every 6 years. Although the dam does not have an Emergency Action Plan in place, it remains a vital resource for agricultural irrigation in the region.
For water resource and climate enthusiasts, Antelope Flat (Crook) offers a fascinating example of infrastructure designed to support agricultural practices in the arid landscapes of Oregon. The dam's role in storing water for irrigation purposes underscores the importance of sustainable water management in the face of changing climate conditions. Its location within the Portland District and its association with Congressman Greg Walden (R) highlight the complex interplay between water resource management, regulatory oversight, and political representation in the region. As discussions around water security and climate resilience continue to grow, Antelope Flat (Crook) serves as a tangible reminder of the critical role that dams play in ensuring reliable water supplies for communities and ecosystems alike.
Year Completed |
1965 |
Dam Length |
640 |
Dam Height |
33 |
River Or Stream |
BEAR & FAUGHT CREEKS & 2 TRIBS |
Primary Dam Type |
Earth |
Surface Area |
171.6 |
Hydraulic Height |
31 |
Drainage Area |
7.3 |
Nid Storage |
2000 |
Structural Height |
36.5 |
Outlet Gates |
Needle |
Hazard Potential |
Low |
Nid Height |
37 |
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.
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Antelope Flat (Crook)