Cuyamaca Dam reservoir
Cuyamaca Dam
Cuyamaca Dam is a historic dam located in San Diego County, California. It was built in the early 1900s to provide water for agriculture in the region. The dam is a concrete arch structure standing 110 feet tall and 375 feet long. It has a storage capacity of 8,110 acre-feet of water. The hydrology of the area is seasonal with most of the precipitation falling during the winter months. The dam captures surface flow from the Cuyamaca Mountains and snowpack from nearby peaks. The water stored in the reservoir is used for irrigation and domestic purposes. The area around the dam is also used for recreational purposes, including hiking, fishing, and camping. The dam is a significant historical landmark in San Diego County and continues to play an important role in the region's water supply.
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 Cuyamaca Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Sweetwater R Nr Descanso Ca | · | → |
| Santa Ysabel C Nr Ramona Ca | · | → |
| Santa Maria C Nr Ramona Ca | · | → |
| Sweetwater R A Dehesa Ca | · | → |
| Los Coches C Nr Lakeside Ca | 0 cfs | → |
| Guejito C Nr San Pasqual Ca | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Cuyamaca Dam.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Cuyamaca Dam
Where does the data for Cuyamaca 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.