San Carlos Reservoir At Coolidge Dam Reservoir
As of July 17, 2026, San Carlos Reservoir At Coolidge Dam is holding 210 ac-ft of water — 1% of normal storage for this date. Storage data refreshed throughout the day.
San Carlos Reservoir At Coolidge Dam
San Carlos Reservoir is located at Coolidge Dam in Arizona and was constructed in 1928 by the Bureau of Reclamation for irrigation purposes. It is the largest reservoir in the San Carlos Irrigation Project, covering an area of 19,500 acres and with a capacity of up to 1,315,400 acre-feet of water. The reservoir receives water from the Gila River and seasonal runoff from the surrounding mountain ranges, which is stored for irrigation, power generation, and municipal use. The reservoir also provides recreational opportunities such as fishing, boating, and camping. Additionally, it is a valuable source of water supply for agriculture in the region, with crops such as cotton, wheat, and alfalfa being grown in the surrounding areas. The hydrology of the reservoir is influenced by both surface flow and snowpack providers, including the Sierra Nevada Mountains and the White Mountains.
Daily levels at San Carlos Reservoir At Coolidge Dam
Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.
Reservoir storage, acre-ft
ac-ft · code 00054
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 San Carlos Reservoir At Coolidge Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Gila River Below Coolidge Dam | 1 cfs | → |
| San Carlos River Near Peridot | · | → |
| Gila River At Calva | 6 cfs | → |
| Aravaipa Creek Near Mammoth | · | → |
| Gila River At Kelvin | 42 cfs | → |
| Pinto Cr Blw Haunted Canyon Nr Miami | · | → |
About San Carlos Reservoir At Coolidge Dam
Where does the data for San Carlos Reservoir At Coolidge Dam come from?
Daily storage, pool elevation, and release rates are sourced from USGS, USBR, and USACE monitoring stations. Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
Storage observations are updated daily by the operating agency. The 15-day weather forecast refreshes throughout the day. Snoflo caches and renders the most recent observation -- check the "as of" timestamp on the storage card.
What does the Hazard 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 reservoir, set a threshold, and you'll get a push the moment conditions cross.