Cyrus Reservoir Dam
Cyrus Reservoir
Cyrus Reservoir, also known as Keith Cyrus Dam, is a private water resource located in Deschutes, Oregon, along Squaw Creek. Completed in 1968, this earth dam serves primarily for irrigation purposes, with a maximum storage capacity of 80 acre-feet and a normal storage capacity of 113 acre-feet. The reservoir covers a surface area of 7.7 acres and has a drainage area of 0.7 square miles. Despite its low hazard potential, Cyrus Reservoir is regulated, inspected, and enforced by the Oregon Water Resources Department to ensure its safety and compliance with state regulations.
With a dam height of 17 feet and a hydraulic height of 13 feet, Cyrus Reservoir stands at the intersection of water resource management and climate resilience in Oregon. The dam spans 1640 feet and has a structural height of 15 feet, providing essential water storage capacity for irrigation activities. The reservoir's location in a rural area without downstream settlements further emphasizes its importance for sustaining agricultural practices and water supply in the region. Despite not being federally owned, Cyrus Reservoir plays a crucial role in supporting the local economy and ecosystem through its efficient water management.
As water resource and climate enthusiasts continue to monitor and assess the state of water infrastructure across the country, Cyrus Reservoir stands out as a reliable and well-maintained irrigation reservoir in Oregon. With a history of effective operation and a focus on safety and regulatory compliance, this private water resource serves as a model for sustainable water management practices in the region. Its low hazard potential, combined with its significant storage capacity, highlights the essential role that Cyrus Reservoir plays in supporting agricultural activities and ensuring water security in Deschutes County.
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 Cyrus Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Crooked River Blw Osborne Canyon | 121 cfs | → |
| Deschutes River Near Culver | 515 cfs | → |
| Crooked River Below Opal Springs | 1,130 cfs | → |
| Metolius River Near Grandview | 1,240 cfs | → |
| Mckenzie River At Outlet Of Clear Lake | 172 cfs | → |
| Mckenzie River Bl Payne Cr | 176 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Cyrus Reservoir.
Boat launches
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Campgrounds
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River runs
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More reservoirs
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About Cyrus Reservoir
Where does the data for Cyrus Reservoir 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 below 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.
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.