HomeMy WebLinkAboutLake Oroville Community Update - Lake Oroville Spillways Construction Update - June 6, 2018 Menchaca, Clarissa
f=r°omDWR Oroville Spillways <oroville@o water.ca.gov>
Sent: Wednesday,June 6, 2018 3:17 PM
To: Menchaca, Clarissa
Subject: Lake Oroville Spillways Construction Update
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Lake Or' oville Community Update
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June 6, 2018
In case you missed it, check out this article in the Enterprise-Record, "(Literal) eagle eyes on
the Oroville Dam spill)Aay,” about a bald eagile pair that set up a new home near the Lake
Oroville spillway,
Labe Oroville Spillways Construction Update
Today the Department of Water Resources (DWR) provided an update on construction-related
activities for the Lake Oroville Spillways Emertd,ency Recovery Project.
Construction on the Main Spillway
• Controlled bllasting demolition of the original 730 feet of upper chute is complete.
Crews are preparing the foundation for placement of structural concrete slabs and
walls.
• In the middle chute, foundation prep is 34 percent complete and crews are preparing
for the installation of sub-drains and slab anchors in advance of placing permanent
structural concrete slabs and walls later this summer.
• Work continues on the energy dissipaters, or dentates, at the bottom of the main
spillway. The d'entates are being hydro-blasted to prepare for the placement of a new
layer of structural concrete reinforced with epoxy-coated steel dowels.
• DWR is again using November 1 as a milestone to complete major construction work
and placement of all concrete on the main spillway. additional work, including dry
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finishing and curingi, of concrete, joint sealing, connecting, drainage systems, backfilling
side walls, and site clean-up on the main spillway will continue after November 1 ,
Construction on the Emergency Spillway
• Construction of the northern half of the roller-compacted concrete splashpad is 80
percent complete.
• Crews are 40 percent complete with foundation prep at the southern half of the
splashpad site in advance of RCC placement.
• Work at the emergency spillway site is not dependent on the November I milestone
and will continue throughout 2018.
Additional Updates
• The free access program for day use, and boat launching at the Lake Oroville State
Recreation Area continues tomorrow and Friday, June 7 and 8. Additional free access
days, include July 5-6, August 2-3 and September 6-7. Free access applies to day use
and boat launching only.
• Lake levels are currently at 818 feet. DWR anticipates some water to pass through the
gates 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.
• DWR met with the U.S. Army Corps of Engineers last week to begin coordinating the
update of the 2018-2019 flood control season operations plan for Lake Oroville. The
plani, will guide reservoir operations through the upcoming flood control season and will
follow a similar approach to the 2017-2018 operations plan.
• The independent Board of Consultants met with DWR for the 18th time on May 29 and
30.
• Crews continue work to resurface a structural concrete slab that was placed last year
that had a poor surface finish and did not meet DWR's quality control standards. When
commenting on the work to remove the top layer of concrete on this slab, the
independent Board of Consultants stated, "the removal of the erosion resistant
concrete has turned out to, be much more difficult than expected...this information
provides empirical evidence that the chute concrete has superior erosion resistant
properties."
To view photos and video of the Lake Oroville Spillways construction, visit DWR's Oroville
Spillway photo gallery and YouTube channel.
For more information, follow us on Twitter or Faceboo read our news releases or visit our
Oroville Spillway Incident webpage.
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Sacramento, CA 95814
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