Lake Shannon At Concrete reservoir
Lake Shannon At Concrete
Lake Shannon is a reservoir located in Concrete, Washington, and was created in 1921 by the construction of a hydroelectric dam on the Baker River. The lake was named after James Shannon, one of the influential founders of the Seattle City Light company. Lake Shannon is fed by the Baker River and has a surface area of 179 acres. The lake's water level is controlled by the Baker River Hydroelectric Project, which also provides power to the region. The snowpack in the surrounding mountains, including the North Cascades, provides water to the Baker River, which eventually flows into Lake Shannon. The lake is used for recreational activities such as fishing, boating, and swimming. The area surrounding Lake Shannon also has several agricultural uses, including dairy farming and hay production.
Daily levels at Lake Shannon At Concrete
Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.
Lake or reservoir water surface elevation above NAVD 1988, ft
ft · code 62615
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 Lake Shannon At Concrete -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Skagit River Near Concrete | 11,800 cfs | → |
| Sauk River Near Sauk | 2,850 cfs | → |
| Skagit River At Marblemount | 5,750 cfs | → |
| Cascade River At Marblemount | 866 cfs | → |
| Bacon Creek Below Oakes Creek Near Marblemount | 297 cfs | → |
| Skookum Creek Above Diversion Near Wickersham | 34 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Shannon At Concrete.
Boat launches
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Campgrounds
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River runs
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About Lake Shannon At Concrete
Where does the data for Lake Shannon At Concrete 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.