Lake Oroville Operations Update April 6


Lake Oroville main spillway March 29 2018

Drone view of the main spillway at Lake Oroville, March 29, 2018. (DWR)

OROVILLE – This is an update to DWR’s April 4 announcement: Current and forecasted storms in the Feather River basin this weekend may require using Lake Oroville’s flood control outlet spillway (also known as the main spillway) this weekend or next week.

After last year’s spillway incident, the Department created the 2017/18 Lake Oroville Winter Operations Plan to ensure public safety in the event of major storm events. This plan triggers more aggressive outflow from Hyatt Powerplant and potential use of the main spillway should the reservoir’s elevation reach 830 feet during the month of April. The current forecasts show the potential for inflows to raise the reservoir near the 830-foot trigger elevation by the middle of next week.

In anticipation of the incoming weather, DWR has increased outflows from the reservoir.

Because the forecasts are dynamic, they could change in magnitude and timing.

The following provides the most current approximate information:

  • Lake Elevation: 792.55 feet
  • Inflow: 12,700 cfs
  • Spillway Outflows: 0
  • Hyatt Powerplant Outflow: 13,000 cfs
  • Feather River Flows: 13,750 cfs

 DWR will provide daily updates around noon until after this storm system has passed.


For more information, follow us on Twitter or Facebook, read our news releases, visit our Oroville Spillway Incident webpage, or visit the California Data Exchange Center for real-time Lake Oroville reservoir data.


Erin Mellon, Assistant Director, Department of Water Resources, Public Affairs

(916) 704-5529 |