HomeMy WebLinkAboutLake Oroville Community Update - Lake Oroville Spillways Construction Update - May 23, 2018 Menchaca, Clarissa
From: DWR Oroville Spillways <oroville@water.ca,gov>
Sent: Wednesday, May 23, 2018 1:26 PM
To: Menchaca, Clarissa
Subject: Lake Oroville Spillways Construction Update
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May 23, 2018
Lake Oroville Spillways Construction Update
Today the Department of Water Resources (DWR) provided an update on construction-
related activities for the Lake Oroville Spillways Emergency Recovery Project.
Construction on the Main Spillway
• Crews continue to demolish the uppermost 730 feet of the original main spillway
chute and have begun using controlled blasting in the center portion of the upper
chute.
• In the middle chute, crews completed demolition of the temporary roller-compacted
concrete walls, and are now preparing for construction of sub-drains, slab anchors,
and structural concrete slabs and walls.
• Work continues on the energy dissipators, or dentates, at the bottom of the main
spillway. The dentates are being hydro-blasted and rebuilt with reinforced structural
concrete and epoxy-coated steel dowels.
• Crews have begun resurfacing one of the structural concrete slabs that did not
meet DWR's quality control standards on the main spillway last year. The slab has
a poor surface finish and the top layer is being removed and replaced with
structural concrete.
Construction on the Emergency Spillway
• Placement of RCC on the northern half of the splashpad is 78 percent complete.
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• Crews continue to clean and prepare the southern half of the splashpad for RCC
placement.
• Placement of the cap or grade beam on the underground secant pile cutoff wall is
complete. The cap will tie the secant piles together and will be secured to the RCC
splashpad.
Additional Updates
• The free access program for day use and boat launching at the Lake Oroville State
Recreation Area kicked off last week on May 17 and 18. The public can enjoy
additional free access days on June 7-8, July 5-6, August 2-3 and September 6-7.
Free access applies to day use and boat launching only.
• DWR and State Parks also announced yesterday that a trail and access road on
the northern shore of the Thermalito Diversion pool will be open to the public for the
Memorial Day weekend.
• Lake levels are currently at 821 feet. As we shared last month, DWR anticipates
some water to pass through the gates onto the main spillway until the lake level
drops below 813 feet. Crews have put in place a water containment system to
collect any water that passes through, which will have no impact on construction.
• The independent Board of Consultants will meet with DWR for the 18th time next
week, on May 29 and 3a. BOC Memo #17 has been posted to the Lake Oroville
spillways webpage.
To view photos and video of the Lake Oroville Spillways construction, visit DWR's Oroville
Spillway hoto gallery and YouTube channel.
For more information, follow us on Twitter or 1=acebook read our news releases or visit
our Oroville Spillway Incident webpa_ae.
Thi's e-mail is part of I ongoing effort • provide •u with finnely information
regarding the Lake Oroville Spillways Recovery. We want to provide a transparent process,
and ensure community Members are well WOM7ed. We also want to hear froin you, so please
• omments and questions.
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California Department of Water Resources
1416 9th St.
Sacramento, CA 95814
Call our general information line at 1-800-248-7026
or email us at oroville(d)water.ca.Aov
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