Hidden Dam (Hensley) reservoir
Hidden Dam (Hensley)
Hensley Hidden Dam is located in California and was constructed in the 1920s as part of a hydroelectric power system. The dam is around 167 feet high and can hold up to 90,000 acre-feet of water. The hydrology of Hensley Hidden Dam is vital for the water supply of the surrounding areas, as it provides water for irrigation, municipal use, and recreation. The dam relies on the surface flows from nearby streams, such as the North Fork of the American River, and the snowpack from the Sierra Nevada mountains. The water is used for agricultural purposes in the nearby counties, including Placer and Sacramento. Recreational activities such as boating, fishing, and camping are also popular in the area.
Daily levels at Hidden Dam (Hensley)
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 Hidden Dam (Hensley) -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| San Joaquin R Bl Friant Ca | 520 cfs | → |
| Nf Willow C Nr Sugar Pine Ca | 416 cfs | → |
| Big C Div Nr Fish Camp Ca | 0 cfs | → |
| San Joaquin R Nr Mendota Ca | 149 cfs | → |
| Merced R A Pohono Bridge Nr Yosemite Ca | 2,040 cfs | → |
| Merced R A Happy Isles Bridge Nr Yosemite Ca | 1,730 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hidden Dam (Hensley).
⚓ Boat launches
- Road 29 Madera County
- County Road 29 Madera County
- Madera County
- San Joaquin River Trail, Friant
- Redinger Boating Site
⛺ Campgrounds
- Codorniz Rec Area
- Cordoniz Group Area South
- Cordoniz Group Area North
- Wildcat Primitive Campground
- Cordoniz Campground
- Hidden View Campground
🎣 Fishing spots
More fishing →🛶 Paddle runs
- Confluence With North Fork San Joaquin River To Hells Half Acre
- Confluence With Middle Fork Tuolumne River To Confluence With Tuolumne River
- Headwaters Near The Tuolumne And Mariposa County Lines To Western Boundary Of Yosemite National Park
- Cora Creek To Confluence With San Joaquin River
- Hemlock Crossing To Confluence With Cora Creek
- Rainbow Falls To Confluence With North Fork San Joaquin River
Track Hidden Dam (Hensley) in the Snoflo app
Save this reservoir as a favorite and set push alerts when storage crosses a threshold (e.g. "alert me at 80% of normal").
About Hidden Dam (Hensley)
Where does the data for Hidden Dam (Hensley) 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 above 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Hidden Dam (Hensley).