Oroville Dam is the centerpiece and largest water storage
facility of the State Water Project. Located about 70 miles north
of Sacramento at the Feather River confluence, Oroville Dam
creates a reservoir that can hold 3.5 million acre-feet of water.
Features such as a fish barrier dam and pool at Oroville Dam made
the SWP one of the first major water projects built with
environmental protections as a major consideration.
Besides storing water, the dam also protects downstream residents
from the floodprone Feather River—the main feeder of the SWP— and
provides major water recreation facilities such as boating,
fishing and camping.
Water levels in the world’s ponds, lakes and human-managed
reservoirs rise and fall from season to season. But until now,
it has been difficult to parse out exactly how much of that
variation is caused by humans as opposed to natural cycles.
Analysis of new satellite data published March 3 in Nature
shows fully 57 percent of the seasonal variability in Earth’s
surface water storage now occurs in dammed reservoirs and other
water bodies managed by people. … The western United
States, southern Africa and the Middle East rank among regions
with the highest reservoir variability, averaging 6.5 feet to
12.4 feet.
The American Society of Civil Engineers (ASCE) gave America’s
infrastructure a C- grade in its quadrennial assessment issued
March 3. ASCE gave the nation’s flood control infrastructure –
dams and levees – a D grade. This is a highly concerning
assessment, given that climate change is increasingly stressing
dams and levees as increased evaporation from the oceans drives
heavier precipitation events. … Climate scientists at
Stanford University found that between 1988 and 2017, heavier
precipitation accounted for more than one-third of the $200
billion in [flood] damage…
California will face another critically dry year, and residents
will need to adapt quickly to cope with water shortages and a
warmer, drier climate that has helped fuel destructive
wildfires. Officials with the state’s department of water
resources announced on Tuesday they had found that the water
content of the overall snowpack for 2 March amounted to 61% of
the average. The state’s largest reservoirs were storing
between 38% and 68% of their capacity, officials said, meaning
that the state would have a lot less water to carry it through
the rest of the year.
The winter storms that dumped heavy snow and rain
across California early in 2021 are likely not enough to negate
what will be a critically dry year, state water officials
believe. California’s Department of Water Resources on
Tuesday recorded a snow depth of 56 inches and water content of
21 inches at Phillips Station in the Sierra Nevada. The water
content of the overall snowpack was 61% of the average for
March 2 and 54% of the average for April 1, when it is
historically at its maximum.
The Bureau of Reclamation and Department of Water Resources
plan to allocate approximately 5 million acre feet of water
this year – as long as California allows them to effectively
drain the two largest reservoirs in the state, potentially
killing most or nearly all the endangered winter-run Chinook
salmon this year, threatening the state’s resilience to
continued dry conditions, and maybe even violating water
quality standards in the Delta.
The process to recoup over $1 billion in repairs to Oroville
Dam’s spillways after the 2017 crisis is receiving more federal
funds. The Department of Water Resources announced Feb. 1 that
the Federal Emergency Management Agency released an additional
approximately $308 million in requested funds for the Oroville
Dam spillways reconstruction and emergency response. These
funds are in addition to over $260 million that FEMA has
already committed to …
Although the 1971 San Fernando earthquake and the near failure
of the Lower Van Norman Dam have given rise to construction
improvements … the overwhelming majority of California dams
are decades past their design life span. And while earthquakes
still loom as the greatest threat to California’s massive
collection of dams, experts warn that these aging structures
will be challenged further by a new and emerging hazard:
“whiplashing shifts” in extreme weather due to climate change.
California Water Service (Cal Water) has announced temporary
leadership changes for its Oroville District. Evan Markey has
been named Interim District Manager, while previous District
Manager George Barber is serving as Interim Director of Field
Operations for the utility’s northern California region. Tavis
Beynon will continue to serve as the Interim District Manager
for the Chico District.
Tens of thousands of large dams across the globe are reaching
the end of their expected lifespans, leading to a dramatic rise
in failures and collapses, a new UN study finds. These
deteriorating structures pose a serious threat to hundreds of
millions of people living downstream…. In 2017, a
spillway collapsed at the 50-year-old Oroville Dam in
California’s Sierra Nevada foothills. It caused the evacuation
of around 180,000 people. The 770-foot dam is the highest in
the U.S. and, after repairs to the spillway, remains critical
to the state’s water supply.
The California Department of Water Resources has secured $308
million in funding to pay for reconstruction and repair work
that has been done on the Oroville Dam’s spillways. The funds,
released by FEMA, are in addition to the $260 million that the
agency provided for repairs on the lower portion of the dam’s
main spillway. Repair work on the damaged emergency and main
spillways has been ongoing for nearly four years following
February 2017’s spillway crisis. The $308 million announced
Monday was at first rejected but later approved by FEMA
following an appeal from the DWR last year.
The Department of Water Resources (DWR) completed its yearly
post-holiday tradition of recycling Christmas trees into prime
habitat for fish species at Lake Oroville and the Thermalito
Afterbay. DWR’s Oroville Field Division and their local
partners collect the trees and bundle them together as habitat
structures that provide juvenile fish shelter to conceal
themselves from predators. Providing these small fish with safe
refuge areas boosts their chance of survival, thereby
increasing fish populations in Lake Oroville and the Thermalito
Afterbay.
Has California overshot the runway? … There was a time
when our dams and aqueducts that allowed us to change the
course plotted by nature by not letting water be restricted to
water basins by physical barriers were considered a candidate
for of their wonders of the world. When it came to freeways, we
were the envy of the land. That was then and this is now. The
list of aging infrastructure that needs addressing is
staggering.
Known as an engineering expert, water community leader, and
champion of the State Water Project (SWP), former
Department of Water Resources Director William
Gianelli served as DWRs third director from 1967 to 1973
and dedicated more than 30 years to public service in both the
state and federal government. (Gianelli also was one of the
founders of the Water Education Foundation, its second
president and the namesake of the Foundation’s Water Leaders
Program.)
The consolidated Oroville Spillway cases are currently
scheduled to go to trial in April of 2021. A large judgement
for monetary damages could potentially bankrupt the State Water
Project, according to filings by the Department of Water
Resources.
The Department of Water Resources recently published a summary
report of a comprehensive needs assessment of safety at
Oroville Dam. It comes after the reconstruction of the
spillways that were damaged and failed in 2017.
A 19-month study of the safety of the Oroville Dam project has
found no “unacceptable risks.” The Department of Water
Resources released its Comprehensive Needs Assessment on Oct.
30, and notes its findings generally agree with those of an
Independent Review Board and a regular five-year review by the
Federal Energy Regulatory Commission…
A team of experts released their findings Monday, concluding
that no urgent repairs are needed right now on the Oroville
Dam. The report goes on to say that the largest earthen dam in
America is safe to operate. However, the Oroville Dam is not
completely in the clear.
In a review of Feather River fall-run Chinook salmon in
September 2019, I described their status through the 2018 run
and expressed optimism for the 2019 run. My assessment proved
overly optimistic, as the 2019 run numbers came in lower than
expected. The lower-than-expected returns appear to be the
consequence of the 2017 Oroville Dam spillway failures.
The North Complex Fire has burned a large portion of Lake
Oroville’s watershed. This could lead to hazardous water
quality after winter rains run all of that sediment into the
lake and the effects could last decades. However, how water
quality could be affected by the fire is still largely unknown.
A lot of area surrounding Lake Oroville that is sitting within
the Lake Oroville State Recreation Area was burned by the Bear
Fire, also known as the North Complex West Zone. … The
Department of Water Resources continues to monitor the fire and
is actively working with CAL FIRE, local law enforcement, and
California State Parks to ensure employee and public safety.
DWR’s water delivery and other critical operations are ongoing
with essential staff on site.
Less than two years after the most destructive fire in
California history tore through Paradise, the same region was
under siege from a second monster firestorm that quickly grew
to more than 250,000 acres, sweeping through mountain hamlets
and killing at least three people. … Across the state, 28
major wildfires have prompted more than 64,000 people to
evacuate…
The California Department of Water Resources is reporting that
algal blooms continue to be present in the West Branch and the
North Fork of Lake Oroville. Sampling continues weekly…
Nearly 200,000 people were evacuated when the spillways failed
at Oroville Dam in 2017, an infrastructure disaster that cost
around a billion dollars to repair. Three years later
scientists say events that partially led to the incident could
become more frequent. It comes down to how and when snow and
rain fall.
What was extraordinary was the unusually deep snow recorded in
the northern Sierra Nevada mountains before the storm event.
Subsequently, several records were set for how much snowmelt
occurred during the atmospheric river. The melt took place
because of unusually warm and wet conditions, and it increased
water available for runoff by 37 percent over rain alone,
straining the capacity of California’s second-largest
reservoir.
There can be little argument that many of the more than 90,000
dams in this country are in need of immediate attention. The
catastrophic failure of two dams in Michigan last month
following an extraordinary amount of rain in a relatively short
period, highlights a number of issues:
The rough dirt and ragged rocks at the Riverbend Park’s
waterfront will soon be replaced with a smooth beach to restore
the one that was swept away by flooding. Construction began
earlier this week to restore the beach that was washed away by
the severe floods caused by the Oroville Dam Spillway crisis.
The Oroville Dam Spillways Reconstruction Project and
Department of Water Resources State Water Project Deputy
Director Ted Craddock, were recognized by the American Society
of Civil Engineers (ASCE) with the Outstanding Projects and
Leaders (OPAL) awards in Washington, D.C.
In February 2017, damage to the Oroville Dam’s spillways
prompted the evacuation of more than 180,000 people living
downstream along the Feather River. The raging muddy waters
also triggered an emergency decision to relocate millions of
young salmon from the Feather River Hatchery to the Thermalito
Annex Hatchery to be raised and held until river water
conditions improved. … Those fish survived and were later
released to the wild – helping fuel a record class salmon
harvest in the ocean two years later.
Cindy Messer considers one of her greatest professional
accomplishments also the toughest experience in her 23-year
career. Messer was sworn in as chief deputy director of the
California Department of Water Resources the day after the
Oroville Dam crisis began in February 2017… But within
months, her boss retired, and she became acting interim
director for the recovery phase.
The federal government has reversed itself and agreed to
reimburse California for most of the $1.1 billion it cost to
repair Oroville Dam after its spillways failed three years ago.
The state Department of Water Resources said Thursday the
Federal Emergency Management Agency agreed to cover
approximately $300 million in repair costs the agency had
previously denied. … All told, the state now expects to be
reimbursed for approximately $750 million of the $1.1 billion
cost of the crisis…
What started as a small hole on the Oroville Dam main spillway
led to massive erosion and a potentially catastrophic event as
more than 180,000 people were evacuated near Lake Oroville and
downstream along the Feather River in February 2017. It’s been
three years since that hole was first spotted.
Department of Water Resources is preparing Oroville Dam’s
primary spillway for use this winter season. The reconstructed
spillway was completed this spring and used for the first time
in April since the 2017 spillway crisis threatened 188,000
residents downstream.
The Feather River Recovery Alliance has filed a motion to
intervene with the Department of Water Resources’ pending
application to re-license operation of the Oroville Dam. …
The motion requests that the Federal Energy Regulatory
Commission reopen the licensing process that was conducted over
a decade ago, and prior to the community becoming aware of
safety concerns at the Oroville Dam.
Rather than physically move water hundreds of kilometers across
earthquake country between Northern California and San
Bernardino, the plan involves reallocating water virtually,
just as you would electronically transfer funds from one bank
account to another. Once the Chino Basin Program is
operational, in times of drought the southern region can draw
water from the new reserve instead of from the State Water
Project… That will mean water impounded by Oroville Dam can
be released into the Feather River, benefitting endangered
chinook.
The California Department of Water Resources announced an
initial State Water Project allocation of 10% for the 2020
calendar year. According to a DWR announcement, the initial
allocation is based on several factors, such as conservative
dry hydrology, reservoir storage, and releases necessary to
meet water supply and environmental demands.
There were questions about the gates that release the water
from Lake Oroville, even before the spillways broke up in
February 2017. Those questions never really got answered. The
focus was on fixing the obvious damage. We could get around to
talking about the gates after that. Maybe.
Despite increased maintenance of Oroville Dam since the
spillway fell apart in February 2017, members of the
community-led Oroville Dam Ad Hoc Group have expressed concern
about the age and wear of mechanics within the spillway’s main
gates, citing similar failures on dams of the same era.
The American Society of Civil Engineers has recognized the
Oroville Dam rebuild as one of 10 outstanding civil engineering
projects. Two runners-up and a winner will be chosen at the
2020 Outstanding Civil Engineering Achievement gala in
Washington D.C. on March 13.
The latest public relations effort cost California water
ratepayers $29,000 to produce an eight-page color advertising
insert that ran in recent days in six Sacramento Valley
newspapers including The Sacramento Bee. … Critics argue it’s
inappropriate for a state agency to be spending public money on
an advertisement that they say serves little purpose other than
to try to make the government look good.
The state Department of Water Resources and Butte County
announced the settlement Tuesday, more than two years after
spillways at the Oroville Dam crumbled and fell away during
heavy rains. The repairs resulted in heavy truck traffic that
damaged Butte County roads. Butte County sued in August 2018.
This event guided attendees on a virtual exploration of the Sacramento River and its tributaries to learn about the issues associated with a key source for the state’s water supply.
All together, the river and its tributaries supply 35 percent of California’s water and feed into two major projects: the State Water Project and the federal Central Valley Project.
The California Natural Resources Agency is hosting an inaugural
public forum designed to address issues related to the Oroville
Dam, according to a press release from the CNRA.
The California Department of Water Resources still has
unfinished business at Lake Oroville, despite completion of
major construction on the spillways earlier this year following
the 2017 events that triggered more than 180,000 people living
downstream to evacuate.
The deadliest and most destructive
wildfire in California history had a severe impact on the water
system in the town of Paradise. Participants on our Oct. 2-4
Northern California
Tour will hear from Kevin Phillips, general manager of
Paradise Irrigation District, on the scope of the damages, the
obstacles to recovery and the future of the water district.
The Camp Fire destroyed 90 percent of the structures in Paradise,
and 90 percent of the irrigation district’s ratepayer base. The
fire did not destroy the irrigation district’s water storage or
treatment facilities, but it did melt plastic pipes, releasing
contaminants into parts of the system and prompting do-not-drink
advisories to water customers.
When the salmon are healthy, the world is healthy. That means
the waters are clean and fast-running and the bottom gravel is
clean. It means the rivers … are pouring as they should into
our oceans, bringing nutrients and sediments into the salt- and
fresh-water interplay.
Steven and Cindy Bolt couldn’t have been happier. For the first
time since February of 2017 and the Oroville Dam spillway
crisis they could launch their houseboat from the spillway’s
boat ramp. “It’s been our favorite place to come,” said Cindy.
“And it’s been a long time.”
The Lake Oroville Dam spillway boat ramp will officially reopen
to the public (at least, on a partial basis) on Friday — more
than two and a half years after it was closed in the aftermath
of the spillway incident in February 2017.
In the appeal, DWR included updated reimbursement requests
totaling an estimated $1.11 billion to cover costs of the
Oroville spillways emergency response and emergency recovery
efforts. Final costs won’t be known until all project work is
complete, according to DWR officials.
It’s not unusual to spot the national bird flying around Lake
Oroville every summer. What’s unusual this year is the amount
currently calling Lake Oroville home. Environmental scientists
from the Department of Water Resources Oroville Field Division
are keeping an eye on seven nesting pairs of bald eagles, four
of which are successfully raising a total of eight young
eaglets.
It is a telling illustration of the precarious state of United
States dams that the near-collapse in February 2017 of Oroville
Dam, the nation’s tallest, occurred in California, considered
one of the nation’s leading states in dam safety management.
On the last Saturday in June, a road in Butte County was
opened. That in itself isn’t anything unusual. Roads are opened
and closed regularly around here. But it was the significance
of this road that makes it a remarkable occurrence. It was the
road over Oroville Dam.
In 2016 California’s rainy season kicked off right on schedule,
at the beginning of October. … By February there was so much
water filling Northern California’s rivers that Oroville Dam,
the tallest in the country, threatened to break after its
spillway and emergency spillways both failed. It was a wake-up
call. In just a few months California had gone from
five-year-drought to deluge, ending up with the second wettest
year on record for the state.
Oroville Dam is officially back open to the public two years
after it was forced to close due to the failure of the dam’s
main and emergency spillways. People can now walk and bike the
more than one-mile-long road across the dam crest. Public
vehicles will still not be allowed.
There are more concerns over lake levels in Oroville as Butte
County leaders take initiative to explore alternative options
for safety measures. The Department of Water Resources (DWR), a
leg of the State Water Project, manages the Oroville Dam. On
Wednesday, DWR officials remained adamant in saying they have
no plans to release water from the Oroville Dam spillway.
Well, apparently we’re all about to die again. The internet
says so. And while the internet often says we’re all about to
die, and we don’t, for some reason people still unquestionably
believe the next scare to come down the information highway. So
it is with the latest local scare, involving the Oroville Dam
spillway.
Specifically, the Feather River Recovery Alliance is asking
FERC to not reissue a license to the state Department of Water
Resources to operate the Oroville Dam until terms of the
agreement are renegotiated, including a new recreation plan.
The group says it received 6,469 local signatures on the
petition.
It worked. Oroville Dam’s main flood-control spillway reopened
for business Tuesday morning, releasing a gentle sheet of water
into the Feather River for the first time since the 2017 crisis
that sent 188,000 people fleeing for their lives. … It was a
far cry from the scene two years ago, when the massive sinkhole
in the spillway turned water releases into an angry, boiling
mess…
Officials predict they might need to open the gates to move
water that accumulated during the wet winter season from the
reservoir down into the Feather River. … Amy Rechenmacher, an
associate professor of engineering practice at USC, said the
spillway’s use is going to be a big test for the agency and
engineers who worked on the project.
Water may cascade down Oroville Dam’s rebuilt spillway next
week for the first time since a massive crater formed in its
nearly half-mile long surface two years ago — a major milestone
in the saga that triggered the evacuation of 188,000 people and
a $1.1 billion repair job to the country’s tallest dam. A storm
forecast to hit this week is expected to fill Lake Oroville to
the point that state dam operators might need to open the
spillway gates…
An engineer with 20-plus years experience working on dams fears
the Oroville dam could be in trouble again. He says the same
problem which led to the failure of the main spillway in 2017
is still happening. … Now, expert Scott Cahill told News
Radio KFBK, water can be seen seeping from the foot of the dam
and dozens of points along the new spillway.
FEMA said that a wide range of pre-existing problems
contributed to the deterioration of both the upper and lower
sections of the massive concrete spillway. The agency argues
that federal law, regulations and policy restrict payments only
to work needed to fix damage stemming from a declared disaster.
Dozens of computer coding teams from around San Joaquin County
were tasked to create an app in roughly seven hours. The issue:
following the destruction caused by the malfunction of the
Oroville Dam in February 2017 and the evacuation of more than
180,000 people, could there be an app that can track dam
leakage, seismic activity and other structural impacts and
communicate with the appropriate individuals to help deter
another disaster?
Blockbuster claims in a lawsuit that a racist, sexist, corrupt
culture contributed to the near-catastrophic failure of
Oroville Dam two years ago can go forward, a Sacramento judge
ruled Thursday. The decision … sets the stage for what
plaintiffs’ attorneys vow will be a deep dive into claims of a
poisonous work culture that nearly disastrously compromised the
nation’s tallest dam.
California’s state water agency is set to appeal a federal
determination that some of the Oroville Dam’s reconstruction
costs are ineligible for reimbursement. The Federal Emergency
Management Agency last week approved an additional $205 million
for the project, on top of the $128.4 million it sent last
year, according to the state Department of Water Resources. But
FEMA officials told the state they likely won’t fund some
portions of the 2-year, estimated $1.1 billion rebuilding
effort that followed the Oroville Dam’s near-failure in
February 2017.
Millions of Californians could end up with higher water bills
after the Trump administration on Friday announced that federal
emergency officials aren’t going to reimburse the state for
$306 million in repairs to Oroville Dam stemming from the 2017
spillway crisis. The Federal Emergency Management Agency said
federal taxpayers shouldn’t have to pay for problems that
existed prior to a massive hole forming in the dam’s concrete
spillway in February 2017…
The Federal Emergency Management Agency approved $205 million
to reimburse California for the Oroville Dam spillway
reconstruction costs, the state Department of Water Resources
announced Thursday. … However, FEMA has notified DWR that it
doesn’t think some of the reconstruction costs are eligible for
reimbursement,
Water is starting to seep down the rebuilt Oroville Dam
spillway. California Department of Water Resources officials
said Wednesday this is common and will not affect the operation
of the dam’s gates, which are not watertight. … Both
spillways at the 770-foot earthen dam, the nation’s tallest,
collapsed in February 2017, forcing nearly 200,000 people
downstream to evacuate.
This past December, DWR reconnected electricity to the Ronald
B. Robie Thermalito Pumping-Generating Plant in Oroville, a
major step towards returning the plant to full operation. A
fire in November 2012 destroyed the plant’s operating capacity,
requiring closure of the facility and its disconnection from
the state’s electrical grid. …
Lake Oroville, currently at 773-foot elevation, could rise to
780-785 feet by the end of the month based on current
projections. DWR and crews with Kiewit Infrastructure West Co.,
the contractor for the spillways construction project, would
remove equipment from the main spillway if the lake elevation
reached 780 feet.
Major dams in California are five times more likely to flood
this century than the last one due to global warming, a new
study finds, possibly leading to overtopping and catastrophic
failures that threaten costly repairs and evacuations. That
means Californians can expect more disasters like the Oroville
Dam, whose overflow channel failed in 2017 after days of
flooding had filled state reservoirs to 85% of their capacity.
Lawyers representing the state Department of Water Resources
will make their case Friday for striking portions of lawsuits
over the spillway crisis filed by the city of Oroville, several
farms, businesses and other plaintiffs. The state is arguing
that certain “inflammatory and irrelevant” allegations should
be removed from the lawsuits, including allegations about
racist actions, sexual harassment and petty theft by DWR
employees and conspiracy to cover up or destroy documents.
Workers were patching Oroville Dam’s weathered concrete
spillway, nearly four years before a massive crater would tear
it open. Michael Hopkins, an employee at the Department of
Water Resources, alleges he saw something he would never
forget. A legally deaf woman was assigned to drive a truck
down the spillway and listen for hollow sounds in the concrete
as her colleagues performed what’s known as “chain drag
testing,” Hopkins wrote in a declaration filed last week in
Sacramento Superior Court.
Thursday marks two years since the first hole opened up in the
Oroville Dam Spillway, triggering an emergency that forced the
evacuation of nearly 200,000 people. … The new emergency
spillway is covered with roller-compacted concrete that looks
like a giant staircase. It is one of the biggest changes during
the reconstruction of the spillway project.
Several areas of the Oroville Dam and lake are undergoing
extensive renovations and improvements, and the Oroville
Recreation Advisory Committee met Friday to hear reports from
the various member organizations overseeing them.
… Aaron Wright of the California Department of Parks and
Recreation said that several of the recently reopened areas
near the dam have received a good amount of traffic.
The earthquakes hit just days after last year’s
near-catastrophe at Oroville Dam, when the spillway cracked
amid heavy rains and 188,000 people fled in fear of flooding.
The timing of the two small tremors about 75 miles north of
Sacramento was curious, and frightening.
The new year will mark a half-century since a “seismic” shift
in geology unfolded. Eldridge Moores was a key thinker in that
shift. … I [Craig Miller] got another dose of that
enduring youthfulness two years ago, chasing after him as he
led me – at a brisk pace — down to the Yuba River bank.
We were in search of the kind of “incompetent” rock that
contributed to the catastrophic collapse of two spillways at
Oroville Dam.
Dam inspectors overlooked technical details during safety
evaluations that could have identified structural problems with
the Oroville Dam spillway before it broke during heavy rains in
February 2017, according to an assessment ordered by the
Federal Energy Regulatory Commission. FERC assembled an
independent, six-person panel to assess the safety inspections
that are required every five years for the roughly 2,500
hydropower facilities that FERC regulates.
Pedestrian public access to the Lime Saddle Marina will be
unavailable on weekdays through late January as the state
Department of Water Resources works on trail improvements.
Employees of the state Department of Water Resources, with the
help of firefighting crews, were cutting brush and watering
down landscapes around Lake Oroville to prevent the
117,000-acre blaze from damaging the reservoir’s
infrastructure, including the 770-foot-tall Oroville Dam.
A trial date has been set to hear several lawsuits against the
state Department of Water Resources over the Oroville Dam
crisis. The court scheduled the trial for June 1, 2020 during
the second case management conference Friday in the Sacramento
County Superior Court.
Federal regulators are raising new concerns about the troubled
Oroville Dam, telling California officials their recently
rebuilt flood-control spillways likely couldn’t handle a
mega-flood. Although the chances of such a disastrous storm are
considered extremely unlikely — the magnitude of flooding in
the federal warning is far greater than anything ever
experienced — national dam safety experts say the Federal
Energy Regulatory Commission’s concerns could have costly
repercussions for California.
State officials said Wednesday the damaged Oroville Dam
flood-control spillway is ready for the rainy season, and will
be able to fully blast water down its half-mile long concrete
chute for the first time in nearly two years if lake levels
rise. Work on the adjacent emergency spillway is ongoing.
A request from the state Department of Water Resources to
temporarily make more than 50 miles of trails in Oroville open
to multiple user groups has been denied by the Federal Energy
Regulatory Commission. DWR proposed this with backing from the
Oroville Recreation Advisory Committee, or ORAC, as a
compensation for trail closures as a result of the 2017
Oroville Dam spillway emergency.
This tour explored the Sacramento River and its tributaries
through a scenic landscape as participants learned about the
issues associated with a key source for the state’s water supply.
All together, the river and its tributaries supply 35 percent of
California’s water and feed into two major projects: the State
Water Project and the federal Central Valley Project. Tour
participants got an on-site update of Oroville Dam spillway
repairs.
President Donald Trump recently signed into law a bill which
requires the Federal Energy Regulatory Commission to conduct an
independent review of the Oroville Dam facility.
The state Department of Water Resources still expects to meet
its quickly approaching Nov. 1 deadline to have all concrete
placed on the Oroville Dam’s main spillway. Crews began by
placing permanent concrete slabs at the bottom of the spillway
of the nation’s tallest dam, making their way to the top. Now,
the upper chute is about three-quarters of the way complete,
DWR reported in a moderated media call on Wednesday.
Gov. Jerry Brown has signed into law Sen. Jim Nielsen’s bill to
form a citizens advisory commission for the Oroville Dam.
Senate Bill 955 creates a 19-member commission to provide a
forum for residents and state officials to discuss reports,
maintenance and other ongoing issues related to the dam.
Fixing the Oroville Dam spillway wrecked by storms in 2017 will
cost $1.1 billion — a $455-million hike from initial estimates
— the state Department of Water Resources announced Wednesday.
The swelling cost can be blamed on design changes that have
been made over the last 16 months and damage to the facility
near Oroville, Calif., that was far more extensive than
initially presumed, the department said.
The north side of the Oroville Dam Diversion Pool will be open
to hikers and bicycles for the Labor Day weekend, and the pool
itself will be open for kayakers. … On Saturday from 8
a.m. to noon, a walk guided by State Parks staff will explore
vestiges of pioneer settlements, grandiose Gold Rush schemes,
and the train tunnel during the construction of the dam, as
well as native plants and animals seen along the way.
Butte County has filed another lawsuit against the state
Department of Water Resources, this time for damages from the
Oroville Dam crisis that continue to increase. The county is
seeking compensation for damage to its roads, which heavy
equipment is still utilizing for construction efforts, and also
for costs associated with responding to the spillway emergency
in February 2017.
A 30-foot-wide section of temporary wall on the upper chute of
the Oroville Dam spillway fell over late last week, the state
Department of Water Resources confirmed on Monday. The collapse
did not impact construction deadlines and resulted in no
injuries, according to the department.
The local oversight committee spearheaded by Assemblyman James
Gallagher and Sen. Jim Nielsen had some suggestions this week
for the state Department of Water Resources on its assessment
of the Oroville Dam. This comes about a month after the
committee met for the first time on July 18.
Eighteen months after the dramatic failure of the spillways at
Oroville Dam in Northern California, a disaster that led to the
evacuation of 188,000 people, construction is on schedule to
complete the concrete work in the main spillway by Nov. 1.
… On Monday, Lake Oroville was 51 percent full, or 73
percent of its historic average for this date.
The presiding judge of the Sacramento Superior Court will be
determining where seven lawsuits filed against the state
Department of Water Resources over the Oroville Dam spillway
crisis will be heard.
Crews have begun to place the final layer of concrete this week
on the upper portion of the Oroville Dam spillway chute. This
marks a “crucial milestone,” said Tony Meyers, project manager
for the recovery project for the state Department of Water
Resources, in a moderated media call on Wednesday.
Another attempt by the state Department of Water Resources to
have the Butte County District Attorney’s lawsuit against the
department thrown out was thwarted Friday. The civil suit stem
from the Oroville Dam crisis and the alleged 3.4 billion to 5.1
billion pounds of debris which fell from the collapsing
spillway into the Feather River in February 2017.
The independent review board hired by the state Department of
Water Resources to put outside eyes on an assessment which will
play a large role in the future operations of the Oroville Dam
has released its first report. Suggestions for infrastructure
changes like the construction of a second gated spillway are
expected to be considered through what DWR is calling a
comprehensive needs assessment.
Fran Obrigewitsch pulled up the most recent photo on her iPhone
of the Oroville Dam spillway, taken just two days before it
started to collapse last year. Her first chance to catch
another glimpse was Monday, as the state Department of Water
Resources reopened the stretch of Oro Dam Boulevard East that
offers views of the spillway to the general public for the
first time since the crisis began.
A historic first meeting between state Department of Water
Resources officials and local leaders as a committee solidified
that the community will have a say in the future of Oroville
Dam operations. … The committee is being led by co-chairs
Assemblyman James Gallagher, Sen. Jim Nielsen and DWR’s John
Yarbrough.
Enhancements to several Lake Oroville recreation areas are in
the works this summer as the state Department of Water
Resources makes good on its promise to improve lake access
ahead of the Oroville Dam relicensing. Some means of getting
more people out on the water include adding boat launch lanes
and parking spots and providing free shuttle services.
Phase two of construction on the Oroville Dam’s main and
emergency spillways is speeding along, as the Oroville
Mercury-Register got to see up close in a tour on Wednesday
guided by state Department of Water Resources officials. With
half of the main spillway currently a work in progress, the
department’s goal is to have the structure ready to use, if
needed, by Nov. 1 — just under four months away.
A local oversight committee will get to have a say as long-term
changes are considered for the Oroville Dam, after Sen. Jim
Nielsen and Assemblyman James Gallagher recently came to an
agreement with the state Department of Water Resources.
Concrete pouring is due to start Monday on the second half of
the Oroville Dam emergency spillway “splash pad.” That’s the
only milestone reported Wednesday during a media call on
progress to repair the emergency spillway and main spillway,
which sustained serious damage in February 2017.
An Inland Empire water wholesaler is poised to get a boost in
state funding for its effort to create a new local water supply
that would provide ecological benefits in Northern California.
The California Water Commission has tentatively approved nearly
$207 million in Prop. 1 water bond funds for the Inland Empire
Utilities Agency’s Chino Basin Conjunctive Use Environmental
Water Storage/Exchange Program.
Heading to Lake Oroville for the holiday weekend? It can be
tricky to keep track of what areas are open to the public, with
construction ongoing at the Oroville Dam spillways. To help
with your plans, here is some information on the accessible
trails, boat launches and other recreational areas.
A Butte County Superior Court judge will determine where
lawsuits against the state Department of Water Resources for
the Oroville Dam crisis will be considered in a written ruling.
This comes as Judge Tamara Mosbarger heard arguments on Friday
from plaintiffs and the defendant.
The largest proposal is an $8.8-billion bond for water supply
and storage efforts including water recycling, stormwater
capture, restoring fish habitats and repairing the spillways of
the Oroville Dam that were damaged in 2017.
The Diversion Pool below Oroville Dam and the trails on both
sides of it will be partially open Friday through the Fourth of
July, the Department of Water Resources announced Wednesday.
The report came during a conference call to update media on the
status of work to repair the spillways, which were heavily
damaged in February 2017.
The U.S. Senate passed on Monday the 2019 Energy and Water
Development appropriations bill, which requires an
independent risk analysis of Oroville Dam. Additionally, the
bill would order the Federal Energy Regulatory Commission to
report the findings of an independent panel reviewing the state
Department of Water Resources’ dam safety practices to the
Senate committee.
The state Department of Water Resources announced plans on
Friday to draw Lake Oroville down to 808 feet elevation by
early next week. This is to provide a second point of access to
the upper chute of the Oroville Dam spillway, through the
radial gates, for construction.
The state Department of Water Resources has beefed up its
response to the independent forensic report on what caused the
Oroville Dam spillway failure last year. The report, released
on Jan. 5, described how insufficient maintenance and repairs
and faulty original design allowed water to seep through the
spillway’s cracks and joints. It also blamed “long-term
systemic failure” on the part of DWR, regulators and the dam
safety industry at large.
A lawsuit filed by Butte County District Attorney Mike Ramsey
against the state Department of Water Resources over
environmental damages resulting from the Oroville Dam spillway
crisis is moving forward in court. Butte County Superior Court
Judge Stephen Benson overruled DWR’s demurrer, which is
essentially a plea to have a case dismissed, through a written
ruling filed on May 31.
An excavator slid down the Oroville Dam spillway slope on
Sunday morning, resulting in minor injuries to its operator,
the state Department of Water Resources confirmed on Wednesday.
Erin Mellon, assistant director of public affairs for DWR, said
that the operator immediately got back to work after the
accident, which is currently under investigation by the
department and Kiewit Infrastructure West Co., the lead
contractor for the construction project.
Bald eagles booted out of their nest last year during the
Oroville Dam spillway crisis have proven to be quite the
resilient pair, making a new home for themselves and
successfully hatching two little ones. During the incident last
February, the state Department of Water Resources had to
reroute powerlines that used to cross the spillway slope.
The Oroville Strong! advocacy group is going by a new name and
hoping to increase its reach to those in the greater area who
have been affected by the spillway crisis. The new entity
called the Feather River Recovery Alliance will be headed by
some of the same leaders; however, it will be disassociated
from the Oroville Chamber of Commerce.
The opening of the Diversion Pool last weekend to kayakers and
hikers appears to have been a big success according to all
involved, and it may happen again. “We’ve already been
discussing it with our partners and probably will,” State Parks
District Superintendent Aaron Wright said Thursday, “but I
can’t commit to that now.”
Two bills proposed by Assemblyman James Gallagher, one of which
would have taken the State Water Project from the state
Department of Water Resources and another which would have
provided funding for school resource officers, failed on Friday
to pass through the Assembly Appropriations Committee.
The second and final phase of reconstruction continues at the
Oroville Dam spillways. … A flight over the location last
week during a break in Butte County Sheriff’s Office helicopter
training exercise, showed that much original concrete at the
top of the chute has been removed, along with the walls.
Californians this year will vote on not one but two water bond
measures totaling $13 billion. Given that the state still
hasn’t spent all of the $7.5 billion from the Proposition 1
water bond passed in 2014, it raises a crucial question: Does
California really need another $13 billion in water bonds?
In order to get boaters and swimmers back to Lake Oroville
after the Oroville Dam spillway was damaged in 2017, state
agencies have announced they will waive fees for the
recreational area on select days over the summer.
While work to repair the main Oroville Dam spillway will
largely be done by Nov. 1, in response to a question, the
Department of Water Resources clarified that work on the
emergency spillway will continue into 2019.
Construction work began just after midnight Tuesday morning on
phase 2 of the repairs to the Oroville Dam main spillway. The
Department of Water Resources had been granted permission by
federal and state regulators to start work May 8, and
contractor Kiewit Infrastructure West didn’t waste any time.
The Federal Emergency Management Agency recently told north
state congressmen Doug LaMalfa and John Garamendi that the
agency is still reviewing whether the state Department of Water
Resources is eligible for further reimbursement to fix the
Oroville Dam spillway.
The NOR-CAL Guides and Sportsmen’s Association and other
fishing groups had spent more than a year pressuring state dam
and fish-hatchery managers to raise extra fish to make up for
the ones the fishing groups say were lost after the Oroville
Dam spillway collapsed in February 2017.
A bill proposed by Assemblyman James Gallagher which would take
the State Water Project out of the hands of the state
Department of Water Resources passed unanimously on Tuesday
through a legislative committee. Assembly Bill 3045 passed 15-0
through the Assembly Water, Parks, and Wildlife Committee and
is now headed to the Assembly Appropriations Committee.
The extreme weather swings experienced by Californians the past
six years — a historic drought followed by drenching winter
storms that caused $100 million in damage to San Jose and
wrecked the spillway at Oroville Dam — will become the norm
over coming generations, a new study has found.
The U.S. Geological Survey over the last year has recorded
dozens of weak and shallow earthquakes near Oroville Dam and
its spillways. And nearly all the tremors — including a
magnitude-0.8 quake recorded Wednesday — share the same
designation: “Chemical explosion.”
While some construction continues at Oroville Dam, the bulk of
work under phase two is expected to begin May 8, state
Department of Water Resources officials said Wednesday in a
monthly media update call. This comes as DWR submitted an
updated 2017-2018 Lake Oroville operations plan on Tuesday to
the Federal Energy Regulatory Commission and the California
Division of Safety of Dams for approval.
After a spring storm system dumped 5 to 7 inches of rain into
the Feather River basin over the weekend, state officials said
Sunday they likely won’t have to use the partly rebuilt flood
control spillway at Oroville Dam after all.
Northern California is bracing for a major spring storm that is
expected to dump several inches of rain on burn-scarred areas
of wine country and could present the first test of the
partially repaired spillway at the nation’s tallest dam.
Flash floods, rising rivers and mudslides are possible across
Northern California as a storm that’s more January than April
barrels in from the Pacific, the National Weather Service
warns. “This is not the time of year when we see these big
precipitation events,” said Daniel Swain, a climate scientist
at UCLA.
Oroville Dam operators said Tuesday they may have to release
water over a partially rebuilt spillway for the first time
since repairs began on the badly damaged structure last summer.
Department of Water Resources officials said anticipated storms
could trigger releases this week or next.
With a pounding storm headed for California, state water
officials said Tuesday that Oroville Dam’s crumbled spillway
could get its first test since being rebuilt in the wake of
last year’s near-catastrophe.
With a powerful storm barreling toward California’s coast,
state officials warned they may have to use the largely rebuilt
flood control spillway at troubled Oroville Dam as early as
next week.
First there was the green spot, now there’s the wet spot. …
But it was something that had been expected, and the Department
of Water Resources said as early as January that it might
happen.
The flows have been shut off through the Hyatt Powerhouse at
the base of Oroville Dam, and the lake is beginning to rise.
And that’s all by design, according to the state Department of
Water Resources.
Kiewit Infrastructure West Co. said on Wednesday that
construction of the underground wall below the Oroville Dam
emergency spillway completed in early March. The 1,450 feet
long wall, drilled 35-65 feet into bedrock, is one preventative
measure against the type of erosion that occurred there last
year, should the emergency spillway ever be used again.
A bill introduced by Sen. Jim Nielsen that would create a
citizens advisory commission for the Oroville Dam was amended
in the Senate last week. This comes as the Oroville Dam
Coalition has been lobbying over the past year for more
community involvement, including through a citizens oversight
committee, as a reaction to the spillway crisis in February
2017.
State Parks workers were pulling cable up a launch ramp at
Bidwell Marina Thursday because the water level in Lake
Oroville is on the rise. March’s storms have brought the lake
level up almost 13 feet since the start of the month, according
to the Department of Water Resources website.
The state Department of Water Resources submitted its plan to
the Federal Energy Regulatory Commission on Tuesday to address
findings in the independent forensic report. The extensive
forensic report, released on Jan. 5, blamed “long-term
systematic failure,” including faulty design and insufficient
maintenance, for the Oroville Dam crisis in February 2017.
A change of venue request from Butte County to Sacramento
County has been granted for plaintiffs in the first class
action lawsuit filed against DWR for the Oroville Dam crisis.
On the 90th anniversary of the catastrophic failure of the St.
Francis Dam, dam safety experts worry that the Oroville Dam
crisis showed that some of those crucial lessons have been
forgotten — or were never retained in the first place.
California Gov. Jerry Brown signed legislation Monday that
seeks to beef up dam inspections following a near disaster that
caused the evacuation of almost 200,000 people living
downstream from the tallest one in the United States. The
measure implements several recommendations from experts who
reviewed the crisis at Oroville Dam last year.
The state Department of Water Resources is still expecting the
federal government to pay the bulk of the cost of repairing the
Lake Oroville spillways.
Though the final phase of repair work on the main spillway at
Lake Oroville is now on the back burner until spring,
Department of Water Resources officials said crews are making
significant progress on repairing the emergency spillway.
Until February 2017, the calls that came to Butte 2-1-1 ranged
from quelling stress, and finding support organizations, to
locating low-cost diapers. But for a few weeks after the
Oroville Dam spillway disaster, the calls were desperate,
seeking evacuation routes, hunting for surviving relatives, and
wondering when residents could return home.
Assemblyman James Gallagher rounded up a group of bipartisan
legislators to visit Oroville on Thursday, where they met with
community members and toured the now-infamous dam.
Representatives of districts ranging from southern to northern
California came to better understand the place where the
evacuation of about 188,000 people occurred just over a year
ago.
Locals who lost business or saw their property value decrease
because of the Oroville Dam crisis are anxious to be reimbursed
through a class action lawsuit filed last week. … There
is a variety of plaintiffs in the class action lawsuit,
including a child care facility, a water ski shop, a ranch and
a ministry.
A year ago, nearly 200,000 Northern California residents were
alarmed by an alert from the state Department of Water
Resources informing them of the potential failure of the
auxiliary spillway at the Oroville Dam. … Everything
department officials do at the Oroville Dam affects our [state
Sen. Jim Nielsen] community — from the water level to the
outflow.
On the anniversary of evacuations prompted by the near disaster
at Oroville Dam, California lawmakers on Monday sent Gov. Jerry
Brown a measure to tighten dam inspection standards.
One year after the worst structural failures at a major U.S.
dam in a generation, federal regulators who oversee
California’s half-century-old, towering Oroville Dam say they
are looking hard at how they overlooked its built-in weaknesses
for decades.
Here’s a conceptual chronology of the near-catastrophe, based
on a sophisticated UC Irvine computer analysis that wasn’t
available to state officials during the emergency.
Butte County District Attorney Michael Ramsey has filed a
lawsuit against the California Department of Water Resources
seeking $34 billion to $51 billion in civil penalties for
environmental damage following the failure of the Oroville Dam
spillways last February.
Butte County prosecutors are seeking up to $51 billion in fines
and penalties against California’s water agency for damage
caused to local river-based wildlife after the Oroville dam
spillway failure last year, officials said.
Butte County District Attorney Mike Ramsey announced Wednesday
that his office filed a lawsuit against the state Department of
Water Resources for environmental damages to the Feather River
as a result of the Oroville Dam crisis.
One year ago, when the main flood-control spillway at Oroville
Dam cracked in two on Feb. 7, 2017, the crater sent concrete
chunks flying and water shooting off in all directions.
Nine individuals or entities from Yuba-Sutter are suing the
California Department of Water Resources for more than $27
million in damages suffered as a consequence of the Lake
Oroville spillway crisis last February.
Last winter, California’s Democratic leaders were feeling
cautiously optimistic that they could work with President
Donald Trump to spur desperately needed infrastructure
investment in the state. One year into the Trump
administration, the prospects for bipartisan partnership on the
issue have dimmed.
More than 40 farmers and business owners in the Oroville area
sued the state Wednesday over the effects of the Oroville Dam
crisis, seeking hundreds of millions of dollars in damages.
Oroville Dam’s battered flood-control spillways have been
largely rebuilt, but the cost of last February’s near-disaster
keeps rising. On Friday, state officials put the total price
tag at $870 million.
Local leaders are pressing the state Department of Water
Resources for details on how residents will be involved in the
community needs assessment. Department officials have said that
constructing additional infrastructure at Oroville Dam,
including a second gated spillway and a fully lined emergency
spillway, would be considered as part of the assessment.
Locals were waiting for Gov. Jerry Brown to say something
during his final State of the State Address about the Oroville
Dam crisis and infrastructure. They were disappointed.
The state Department of Water Resources could have lost control
of the spillway radial gates for days during the Oroville Dam
crisis if crucial power lines had gone down, according to
department officials. DWR leaders Cindy Messer and Joel Ledesma
stated this Jan. 10 during a legislative oversight hearing on
the dam at the State Capitol.
After a 5-month stint running California’s Department of Water
Resources, Grant Davis was reappointed Tuesday to his prior job
as general manager of the Sonoma County Water Agency. The Board
of Supervisors, acting as directors of the Water Agency,
unanimously agreed to reinstate Davis, commending him as a
trusted leader with a proven track record in the area.
An investigation into last winter’s near catastrophe at
Oroville Dam uncovered a litany of problems with how the dam
was built and maintained, but one of them stands out: Even as
workers built the dam, they were raising alarms about the
eroded, crumbling rock on which they were directed to lay
concrete for the 3,000-foot-long main flood control spillway.
The city of Oroville filed a lawsuit against the state
Department of Water Resources Wednesday which alleges
fabricated maintenance reports, racial discrimination and
decades of mismanagement led to the Oroville Dam spillway
failure last February.
Signaling what could be a wave of lawsuits arising from last
year’s spillway crisis, the city of Oroville is planning to
file a complaint Wednesday against the state Department of
Water Resources for damages it says it suffered during and
after the emergency. About 188,000 people were evacuated from
communities along the Feather River after the failure of
Oroville Dam’s main spillway last Feb. 7.
The verdict is in and California stands convicted of gross
negligence in the construction and maintenance of the nation’s
highest dam, Oroville. The dam on the Feather River came very
close to failing last year, forcing the evacuation of a
quarter-million people living downstream. … Clearly, for
decades there was no willingness at DWR [California Department
of Water Resources] to acknowledge the fundamental nature of
the flaws and spend money to repair them.
The storms of January have the north state’s rivers and streams
running high, and have raised the level of Lake Oroville 5 feet
since the start of the year.
Grant Davis, director of the California Water Resources
Department, was replaced Wednesday just days after an
independent investigation of the Oroville dam spillway incident
last year found that a flawed safety culture contributed to the
disaster. The agency said Gov. Jerry Brown replaced Davis with
Karla Nemeth, who has been deputy secretary and senior advisor
for water policy at the California Natural Resources Agency
since 2014.
Starting with the damaged Oroville Dam, California seemed to
careen from disaster to disaster in 2017. The dam’s spillway
alone is projected to cost more than $500 million to repair.
… [Gov. Jerry] Brown maintains that the state will face more
weather-related extremes in years ahead because of climate
change.
“A long-term systemic failure.” The words leap off the opening
page of the independent forensic report that examined the
Oroville Dam crisis in February of last year.
California water officials have always insisted public safety
was their only concern as they struggled with the crisis
unfolding last February at Oroville Dam. The forensic team
investigating what happened at Lake Oroville, however, has
pinpointed another factor guiding the decisions made by the
Department of Water Resources: the state’s desire to continue
shipping water to faraway farms and cities that rely on
deliveries from the reservoir.
The spillway failures at Oroville Dam that prompted tens of
thousands to flee for their lives last winter were the result
of years of mistakes, lax inspections and lazy repairs by the
state’s water agency, a team of independent dam experts
reported Friday. Their conclusions: State water managers should
not have built the dam’s primary spillway on faulty
bedrock.
Less than nine months after two massive holes formed in Lake
Oroville’s main spillway, construction crews wrapped up their
first phase of rebuilding it. Some local residents have
expressed concerns that the quick turnover could result in
faults or design flaws, but an official with the Department of
Water Resources said if any crew can accomplish the feat, it
would be Kiewit Infrastructure West Co.
The independent team of experts investigating the dramatic
failure of the spillways last February at Oroville Dam that led
to the evacuation of 188,000 people has concluded that
California water officials were “overconfident and complacent”
and gave “inadequate priority for dam safety,” according to a
final report released Friday.
The forensic team investigating the February emergency at
Oroville Dam blasted the California Department of Water
Resources on Friday, saying the dam’s owner and operator did a
poor job of designing, building and maintaining the structure
and neglected safety while focusing on the “water delivery
needs” of its customers to the south.
State Department of Water Resources officials recently met with
Oroville Dam Coalition members to consider their ideas for
the Oroville Wildlife Area project, but announced later
the same day that the department had different plans.
Elected officials and other groups representing those living
below the troubled Oroville Dam have asked the Trump
administration to hold off on renewing its 50-year license,
saying the federal government should at least know why the
spillway broke in half last winter before signing off.
There were many takeaways from last February’s Lake Oroville
spillway incident, but one very alarming one: a large number of
Yuba-Sutter residents who evacuated said they experienced
issues with leaving the area, mainly due to traffic congestion.
And a startling number of residents reported that they stayed
home instead of fleeing, risking their lives in the event the
emergency spillway did collapse.
The near-disaster at Oroville Dam last February brought damage
claims flooding into the state by the hundreds – shops and
restaurants that lost business, farms that got overwhelmed by
surges in water, cities and counties buried in evacuation
expenses. Most claims argue that the state is responsible for
the emergency because it ignored warning signs about the
condition of the dam’s spillway.
The Oroville Dam spillway crisis this past February is still
under investigation – all sorts of investigations, including
concerns about vegetation and cracking. Officials say the
problems have been mitigated, plus, this water year might not
be as wet as last.
The previously secret state Department of Water Resources
memorandum explaining the hairline cracks in the Oroville Dam
spillway is now public. The document provides more details on
how Kiewit Infrastructure West Co., the contractor for spillway
reconstruction, tried to reduce shrinkage, which leads to
cracking in concrete.
Yuba-Sutter residents voiced concerns to the Department of
Water Resources over a variety of issues Thursday night,
including the hairline cracks that have appeared on the
reconstructed spillway, a need for more transparency moving
forward, and the significant amount of sediment buildup in the
Feather River brought about by the Lake Oroville incident last
February and plans – or lack thereof – to clear it out.
Residents showed lingering distrust Wednesday night as they
voiced concern about loss of access to recreation and questions
about hairline cracks in the reconstructed spillway.
Northern California residents living in the shadow of the
nation’s tallest dam vented decades of frustration with state
water managers Wednesday, telling officials they have no
credibility when they say hairline cracks in a newly rebuilt
spillway are nothing to worry about.
It might be another year or so until reconstruction of the main
spillway at Lake Oroville is officially complete, but
Department of Water Resources officials say the structure is
ready for whatever this winter can throw at it, even if there
are a few cracks here and there.
Phase two of construction at Oroville Dam — with work on both
spillways — might prove more challenging than the first feat,
the contractor’s project director said in a media call
Thursday. … DWR [California Department of Water
Resources] will hold two community meetings next week.
Oroville’s mayor said Thursday she knew about cracks in the
replacement spillway at the troubled dam nearby and is not
concerned, but heaped criticism on state water officials for
failing to communicate with her town. Linda Dahlmeier said the
Department of Water Resources should have proactively
communicated that cracks were expected but has instead created
a “firestorm” in a community that was rattled by sudden
evacuation orders last February.
Politicians and river guides are calling upon the state
Department of Water Resources to mitigate sediment build up in
the Feather River following the Oroville Dam
crisis. … The state Department of Water Resources
is currently assessing the impacts of sediment on the river
system, with the study expected to be complete in December,
said Jon Ericson, acting division chief for the division of
flood management.
Hairline cracks have been detected in sections of the newly
reconstructed flood-control spillway at Oroville Dam. State and
federal officials said they’re confident the cracks don’t pose
a safety problem and don’t need to be repaired.
