Main Spillway

Upper Section

Main Spillway

Upper Section

Structural rebar panels

8,519,000 pounds of

reinforced steel

Main Spillway

Middle Section

Middle Section

Roller Compacted Concrete

(RCC)

Every 5 minutes a dump truck

dropped 21 cubic yards of RCC

Main Spillway

Lower Section

138,000cubic yards of

Structural concrete

5.5 sidewalk from Sac to

LA

Main Spillway

Lower Section

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The November 1, 2017 milestone was accomplished.

The flood control spillway is able to handle 100,000 cubic

feet per second for the upcoming

winter season.

Conceptual Construction - Cut-off wall completion January 2018

17

Conceptual Construction -Emergency Spillway Buttress completion December 2018

18

Emergency Spillway

Cut-off Wall

Emergency Spillway

Cutoff Wall

Emergency Spillway

Cutoff Wall

Secant Pile Placed

Emergency Spillway

Controlled blasting

Holes are bored to remove rock for the new RCC

splashpadthrough

Dec. 2017

Questions?

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For More Information1-800-248-7026

twitter.com/@CA_DWR

facebook.com/CADWR

www.youtube.com/user/calwater

Lake Oroville Spillways Incident webpage: water.ca.gov/oroville-spillway