HomeMy WebLinkAboutLake Oroville Community Update - Lake Oroville Construction Updates Menchaca, Clarissa
From: DWR Oroville Spillways <oroville@water.ca.gov>
Sent: Wednesday, February 21, 2018 1:15 PM
To: Menchaca, Clarissa
Subject: Lake Oroville Spillways Construction Updates
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February 21, 2018
Lake Oroville Spillways Construction Updates
Today the Department of Water Resources (DWR) provided an update on construction
activities for the Lake Oroville Spillways Emergency Recovery Project.
Construction at the Emergency Spillway
• The underground secant pile wall is 95 percent complete and is targeted for completion
in March of 2018. The secant pile wall is being constructed 730 feet downhill of the
emergency spillway at depths of 35 to 65 feet.
• Foundation preparation continues for the roller-compacted concrete (RCC) splashpad.
Crews are expected to begin placing RCC next week. The RCC splashpad, in
conjunction with the secant pile wall, will armor the existing terrain to significantly
reduce the type of uphill erosion that occurred during February 2017 if the emergency
spillway is ever used again.
• Work at the emergency spillway also include construction of an RCC buttress at the
base of the emergency spillway, which will begin later in 2018.
Construction on the Main Spillway
Phase Two of construction on the main spillway is expected to begin in May, but exact timing
depends on weather. This year's work includes:
• Removal of the original 730 feet of the upper chute leading to the radial gates and
replacement with steel-reinforced structural concrete.
• Placement of a 2.5-foot layer of steel-reinforced structural concrete over the RCC
middle chute.
• Removal of the RCC walls in the middle chute and replacement with structural
concrete walls.
• Hydro-blasting and resurfacing of the energy dissipaters at the base of the main
spillway.
Oversight Update
• DWR will meet with the Independent Board of Consultants (BOC) for the 15th time
tomorrow and Friday, Feb. 22 and 23. The BOC is also reviewing the Independent
Forensic Team's final report released last month.
To view photos and video of the Lake Oroville Spillways construction, visit DWR's Oroville
Spillway photo gallerX and YouTube channel.
For more information, follow us on Twitter or Facebook, read our news releases or visit our
Oroville Spillway Incident webpage.
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