East Park Reservoir
As of August 10, 2026, East Park Reservoir is holding 48,204 acre-ft of water — 116% of normal storage for this date. Storage data refreshed throughout the day.
East Park Reservoir
East Park Reservoir is a man-made body of water situated in the foothills of the Northern California Coast Range. It was built by the Bureau of Reclamation in 1967 to store water from Stony Creek, a tributary of the Sacramento River, for agricultural purposes. The reservoir has a capacity of 150,000 acre-feet and covers an area of 11,500 acres. It provides irrigation water to over 36,000 acres of farmland in Colusa and Glenn Counties. The reservoir is also a popular recreational area, attracting campers, anglers, and boaters. The hydrology of the reservoir is primarily dependent on the snowpack in the mountains to the west and the surface flow of Stony Creek. The reservoir is managed by the Bureau of Reclamation, who oversee the water supply and recreation activities.
Daily levels at East Park Reservoir
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 East Park Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Nf Cache C A Hough Spring Nr Clearlake Oaks Ca | 31 cfs | → |
| Nf Cache C Nr Clearlake Oaks Ca | 275 cfs | → |
| Sacramento R A Colusa Ca | 8,960 cfs | → |
| Bear C Ab Holsten Chimney Cyn Nr Rumsey Ca | 20 cfs | → |
| Cache C Nr Lower Lake Ca | 261 cfs | → |
| Ef Russian R Nr Calpella Ca | 48 cfs | → |
About East Park Reservoir
What is the water level at East Park Reservoir right now?
As of August 10, 2026, East Park Reservoir is holding 48,204 acre-ft, about 116% of normal for this date. Pool elevation and the year-over-year trend are shown above.
Is East Park Reservoir high or low right now?
Compare the percent-of-normal figure on this page: above 100% means storage is higher than the historical average for the date (a wet year), below 100% means lower (a dry year or drought). The daily-levels chart shows the current trend.
Where does the data for East Park Reservoir 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.
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