Seven Oaks Dam reservoir
Seven Oaks Dam
The Seven Oaks Dam is a concrete gravity dam located in San Bernardino County, California. Built in 1999, it stands at 550 feet tall and spans 2,200 feet across the Santa Ana River. The dam was constructed to protect the cities of San Bernardino and Riverside from severe flooding. The hydrology of the region is heavily influenced by snowpack, which is the primary source of surface water for the Santa Ana River. The dam captures water from the river during wet seasons and releases it during dry seasons to support agricultural and recreational activities downstream. The dam has a capacity of 182,000 acre-feet and can hold up to 6.4 billion gallons of water. The area around the Seven Oaks Dam has become a popular destination for hiking, fishing, and other outdoor activities.
Daily levels at Seven Oaks Dam
Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.
Storage
acre-ft · code 2
Pool Elevation
ft · code 1
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 Seven Oaks Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Sar Supp Gage Nr Mentone Ca | 29 cfs | → |
| Santa Ana R Nr Mentone (River Only) Ca | 25 cfs | → |
| Plunge C Nr East Highlands Ca | 3 cfs | → |
| City C Nr Highland Ca | 1 cfs | → |
| Sand Canyon C Nr Highland Ca | 1 cfs | → |
| E Twin C Nr Arrowhead Springs Ca | 1 cfs | → |
About Seven Oaks Dam
Where does the data for Seven Oaks 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.