The U.S. Bureau of Reclamation will boost water releases from Folsom and Nimbus dams into the American River in response to heavy rainfall delivered by Friday's storm.
Flows will ramp up slowly, starting at 8 p.m. Friday, from 1,800 cubic feet per second to 5,000 by 10 p.m.
The river level is expected to increase by about 2 feet, inundating many shoreline areas that are now exposed. People recreating along the river in the Sacramento metro area are advised to be aware and cautious of this change in water levels and flow velocities.
Flows will be reduced again on Monday to 2,000 cubic feet per second so crews can safely remove in-stream structures associated with Nimbus Hatchery. Afterward, flows will be ramped back up to 5,000 cfs.
Depending on local storm runoff conditions, flows may be further increased late Monday or Tuesday.
Daily information on expected flows in the American River are available on the Department of Water Resources California Data Exchange Center website or from the U.S. Army Corps of Engineers' website.