Antelope Flat (Crook) dam
Antelope Flat (Crook)
Antelope Flat (Crook) is a privately owned irrigation dam located in Crook, Oregon, specifically in the city of Prineville. 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.
Dam data reference
Condition Assessment
- Satisfactory
- No 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.
- 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.
- 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.
Hazard Potential Classification
- High
- Dams 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, environmental 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.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Antelope Flat (Crook) -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Bridge Cr Abv Coyote Canyon Nr Mitchell | 2 cfs | → |
| Crooked River Blw Osborne Canyon | 94 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Antelope Flat (Crook).
Boat launches
- Antelope Flat Reservoir
- Prineville Reservoir Resort
- Jasper Point
- Roberts Bay East
- Prineville Reservoir State Park
- County Ramp
Campgrounds
- Antelope Flat Reservoir Campground And Day Use
- Antelope Reservoir Campground
- Antelope Reservoir
- Double Cabin Campground
- Wiley Flat Campground
- Wiley Flat
Track Antelope Flat (Crook) in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Antelope Flat (Crook)
Where does the data for Antelope Flat (Crook) come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Antelope Flat (Crook).