The Sacramento Valley, the northern part of the Central Valley, spreads through 10 counties north of the Sacramento–San Joaquin River Delta (Delta). Sacramento is an important agricultural region, growing citrus, nuts and rice among many other crops.
Water flows from the Sierra Nevada Mountain Range to the region’s two major rivers — the Sacramento and American – and west into the Delta. Other rivers include the Cosumnes, which is the largest free-flowing river in the Central Valley, the lower Feather, Bear and Yuba.
The Sacramento Valley attracts more than 2 million ducks and geese each winter to its seasonal marshes along the Pacific Flyway. Species include northern pintails, snow geese, tundra swans, sandhill cranes, mallards, grebes, peregrine falcons, heron, egrets, and hawks.
Water tests at school drinking fountains across Northern California found dangerous levels of lead and other metals, prompting school officials to shut down the fountains. However, thousands of schools across California have not participated in a state-funded program to test their drinking water, according to an investigation by KCRA 3.
Sen. Jim Nielsen, Assemblyman James Gallagher, and members of the Oroville Dam Coalition are seeking federal assistance on issues relating to the dam they say need to be resolved. They met with commissioners of the Federal Energy Regulatory Commission and representatives for the U.S. Army Corps of Engineers, the U.S. Department of Transportation and the Federal Emergency Management Agency.
State Sen. Jim Nielsen, Assemblyman James Gallagher and Oroville Dam Coalition members are heading to Washington, D.C., this week to address what they say are outstanding issues following the spillway crisis.
Reps. John Garamendi, D-Walnut Grove, and Doug LaMalfa, R-Richvale, Monday introduced to a bill that would require the Federal Energy Regulatory Commission to conduct an additional environmental review of the Oroville Dam. The congressmen would like to see a review done before the commission approves the relicensing of the dam under state Department of Water Resources’ management.
California is launching an overall safety review of the nation’s tallest dam to pinpoint any needed upgrades in the half-century-old structure, water officials said Wednesday, launching the kind of overarching review called for by an independent national panel of experts in September following the collapse of two spillways at Oroville Dam.
Crews are laying the last layer of concrete on the Oroville Dam spillway with one day until the state Department of Water Resources’ deadline to have the structure ready to pass flows of 100,000 cubic-feet per second, or cfs.
Even living here on the West Coast, Marion Townsend decided to act as floods ravaged Texas and hurricanes pounded the Caribbean in recent weeks. Her Sacramento neighborhood slopes downward from a levee that separates it from the American River, in an area that officials concede never should have been settled but is home to 100,000 residents.
Considering the events of this past winter and the problems they posed to Yuba-Sutter levees, officials are confident the improvements made over the past several months will withstand the upcoming flood season.
California needs to spend another $100 million a year to keep the state’s levee system sound, according to state flood control experts. At a press conference marking flood preparedness week Monday at a levee repair site near Sacramento, Bill Edgar, president of the Central Valley Flood Protection Board said the levees will need a $17 billion to $21 billion investment over the next 30 years to protect the seven million Californians at flood risk.
Over the past several weeks crews have been out on Whiskeytown Lake repairing the temperature curtains in the water near the Visitors Center. … The curtains are an important part of the bureau’s Central Valley Project, which includes Trinity and Lewiston dams and Shasta and Keswick dams.
The state Department of Water Resources plans to clear mounds of rock from the Gold Rush days at the Oroville Wildlife Area and put them to use in the rebuilding of the spillways at Oroville Dam. DWR received approval from the Federal Energy Regulatory Commission, according to a filing made last week.
Scientists with the National Oceanic and Atmospheric Administration think two main factors caused low numbers of spring-run chinook salmon to return this year: drought and abnormally warm temperatures.
Survey results largely showed that respondents weren’t happy with how things went down this past February at the Lake Oroville spillways and the events that followed. Most respondents expressed their concerns were with the California Department of Water Resources.
The cost of repairing the crippling damage to Oroville Dam’s spillways caused by last winter’s fierce storms has almost doubled, state water officials said Thursday. … Jeff Petersen, project manager for Kiewit, said that once construction workers got on the site they discovered they had to dig much deeper to get down to bedrock than they had expected.
In one of the fastest-paced civic construction jobs in recent U.S. history, hundreds of carpenters, operating engineers and iron workers are rushing to complete repairs to the damaged Oroville Dam spillway. The crews are trying to beat a Nov. 1 deadline and the Northern California rainy season, which once again will begin to fill the massive reservoir behind the nation’s highest dam.
A plan has been prepared for flood control operations this rainy season at Oroville Dam, which call for keeping the lake lower and aggressively releasing water if the water level rises above trigger points. Up to now, the dam has been operated under rules drafted by the Army Corps of Engineers in 1970, which set a maximum lake surface elevation target of 848.5 feet above sea level for November through April, and 870.1 feet in May.
This tour explored the Sacramento River and its tributaries through a scenic landscape as we 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. This year, special attention was paid to the flood event at Oroville Dam and the efforts to repair the dam spillway before the next rainy season.
The state Department of Water Resources intends to open the spillway boat launch ramp after construction at the dam is complete, but there is a possibility it will stay out of commission, according to a department official. The spillway boat launch is the largest on the lake, with up to 12 lanes when the water is high enough.
With just more than two weeks until the initial reconstruction of the main spillway at Lake Oroville is supposed to be completed, the Department of Water Resources released operations plan for the reservoir for this coming flood season.
In February, a huge hole opened in the Lake Oroville main spillway. The cause of the hole is still undetermined. … State and federal agencies devised a plan to quickly repair or replace the structures at the lake.
Where are all the fish? That’s what hatchery workers are wondering, left scratching their heads after seeing low levels for spring-run Chinook salmon – about a third of the average for this time period.
After big natural disasters like Hurricanes Harvey and Irma, federal officials often tighten up flood protection standards. That’s what happened in California after Hurricane Katrina twelve years ago. But many flood-prone communities are still struggling to meet those standards, including Sacramento, one of the riskiest flood zones in the country.
State lawmakers responsible for the safety of residents downstream from Lake Oroville applaud the Department of Water Resources reconstruction to the dam’s damaged primary and emergency spillways, but the lawmakers still want answers and accountability for the cause of February’s near-catastrophe.
The Sacramento and San Joaquin are the two major rivers in the Central Valley that feed the Delta, the hub of California’s water supply network.
Our last two water tours of 2017 will take in-depth looks at how these rivers are managed and used for agriculture, cities and the environment. You’ll see infrastructure, learn about efforts to restore salmon runs and talk to people with expertise on these rivers.
A single photograph of rapid erosion below Oroville Dam’s emergency spillway — and an unidentified geologist’s worried question about whether the local sheriff knew how dire the situation might be — were the key events that led to the evacuation of 180,000 people living along the Feather River on Feb. 12.
In the confusion and chaos of the emergency at Oroville Dam, as thousands of residents were being evacuated, public safety officials and others involved in managing the crisis found themselves clashing with the people operating the nation’s tallest dam.
A towering spillway at the nation’s tallest dam was crumbling, and tens of thousands of people were fleeing for their lives. But as darkness fell, state officials realized dealing with the unfolding crisis in Northern California was about to get even worse: They couldn’t see.
Faulty design, construction and repairs of the main Oroville Dam spillway allowed water to seep under its floor and build up, lifting a concrete slab Feb. 7 into the water flowing down the chute, starting a chain of events that largely wrecked the structure.
Sites Reservoir has been talked about for decades, but now that project officials — and backed by 70 major allies — have formally submitted an application for state bond money, the question arises: Will this $5 billion project actually come to pass?
Bad design and construction of the tallest U.S. dam a half-century ago and inadequate state and federal oversight since then led to a disastrous spillway collapse in February, an independent national team of dam safety experts said Tuesday as they urged tougher safety reviews nationwide.
A team investigating the Oroville Dam spillway breach in February said it has not seen evidence that a comprehensive review of its construction and design has ever been conducted since it was built nearly 40 years ago. … Agencies like the Bureau of Reclamation, which operates Shasta Dam, do more comprehensive construction and design reviews.
A team of independent experts charged Tuesday that the state and federal officials who inspected Oroville Dam relied too heavily on visual inspections, ignoring blueprints, construction records and other documented clues that could have warned them about the dam’s troubled flood-control spillway long before it fractured in February. … The forensic team’s report brought a swift response from Assemblyman James Gallagher, R-Yuba City, whose constituents were among those evacuated.
The most detailed report yet on what went wrong at Oroville Dam last winter when 180,000 people fled amid fears of flooding found that state and federal officials failed to uncover long-standing construction and maintenance issues at the nation’s tallest dam.
The UC Berkeley group analyzing the state Department of Water Resources’ response to the spillway crisis is still not satisfied with the department’s explanation for Oroville Dam’s “green spot” in a report released earlier this week.
The state Department of Water Resources has released a report on the Oroville Dam’s “green spot,” declaring the extensive area of persistent moisture on the face of the dam is due to seasonally trapped rainfall and poses no threat to the dam’s integrity.
Taxpayers have spent billions of dollars on dams, levees and bypasses to keep Sacramento and other Central Valley towns and cities from flooding, but experts say the infrastructure would prove no match for a megastorm like the one that pummeled Houston this week.
It’s been six months since a failure of the Oroville Dam Spillway led to the evacuation nearly 200,000 people, including hundreds who took refuge at an evacuation center at the Nevada County Fairgrounds as well as hotels in the Grass Valley and Nevada City area.
A man has been sentenced to 13 years in state prison after pleading no contest to charges he broke into an Oroville market during the Oroville Dam spillway evacuations in February, Butte County District Attorney Mike Ramsey announced Friday.
The Oroville City Council fired off a critical letter to the Federal Energy Regulatory Commission, criticizing how the Department of Water Resources operates Oroville Dam and demanding a host of changes.
Construction at the Lake Oroville spillways is on schedule to meet a Nov. 1 deadline for this year’s repairs, according to the Department of Water Resources. The department has passed the midway point on its construction timeline for this year’s repairs on the main spillway, which was badly damaged during high February releases.
Each year, participants on the Northern California Water Tour enjoy three days exploring the Sacramento Valley during the temperate fall. Join us as we travel along the Sacramento and Feather rivers through a scenic landscape and learn about issues associated with storing and delivering the state’s water supply.
The [McClellan] Air Force has consistently denied that toxins have escaped the base boundaries and contaminated drinking water supplies, but a series of new lawsuits by two area water districts seeking $1.4 billion in damages has renewed concerns among some who spent years drinking water from area pipes and wells.
Sacramento County led a cascade of area governments suing the state in an effort to block the Delta tunnels, saying the $17 billion project would harm local farmers, endangered fish and low-income communities at the south end of the county.
The state Department of Water Resources is beginning to lay the gravel foundation for spawning salmon. This comes as much of the gravel was washed away with high flows from the Oroville Dam spillway this winter.
The failure of the Oroville spillway in February led people to notice a large green spot on Lake Oroville’s dam. The spot has been there for years, but the questions remain as to whether it’s a sign the dam is leaking.
Federal disaster officials have agreed to chip in $22.8 million to help California pay the estimated $500 million cost of the Oroville Dam crisis. … Department of Water Resources spokeswoman Erin Mellon said Wednesday during a biweekly conference call with reporters that she expects more money to come the state’s way.
Consider a couple of scenarios for big trouble at Oroville Dam: First: The facility’s main concrete spillway suffers serious damage, resulting in erosion of the rock beneath it — and potentially threatening the safety of the dam itself.
In a sweeping legal fight that could affect drinking water supplies for thousands of Sacramento-area residents, two water districts near the old McClellan Air Force Base are suing the federal government for $1.4 billion to clean up the cancer-causing chemical hexavalent chromium from the area’s groundwater supplies.
Several Oroville city councilors have voiced criticism about the mayor’s communication with representatives of the state Department of Water Resources and the State Water Contractors during the height of the Oroville Dam crisis.
One week before the deadline to formally seek payment from the state of California for damages stemming from the Oroville Dam’s spillway failure this year, the state has received 93 claims worth a combined $1.1 billion.
Six months ago, relentless winter storms dumped nearly 13 inches of rain in four days on the Sierra Foothills, tearing an enormous hole in the spillway at Oroville Dam, the nation’s highest, and leading to an unprecedented emergency that prompted the evacuation of 188,000 people from nearby towns. Today, what could have been ground zero for America’s worst dam disaster is now a hotbed of construction activity.
The heavy work is now underway on emergency repairs to the nearly 3 miles of levee protecting the heart of Yuba City. The Sutter Butte Flood Control Agency received federal approval Tuesday night to proceed wth the work.
Work crews with heavy machinery started emergency repairs Thursday to a levee that protects Yuba City, and was damaged by high flows during the Oroville Dam spillway emergency. The $28.5 million project will create a seepage cutoff wall and rebuild 2.9-miles of levee along the west side of the Feather River that protect 80,000 people.
Lawyers filed a $15 million government claim on Tuesday on behalf of walnut farmers who say they lost more than two dozen acres of land along the Feather River when the Oroville Dam spillway failed in February, causing massive flooding and destructive erosion in the area below.
Drone video released by the California Department of Water Resources shows how repairs are moving along at the Oroville Dam’s main spillway, which crumbled during the extremely wet winter and forced the evacuation of 180,000 people.
The deadline is Aug. 14 to apply for water storage funding from the Proposition 1 bond measure voters approved in 2014, and while the folks working to build Sites Reservoir will be applying, they don’t need the money. Enough water agencies have agreed to invest in the reservoir near Maxwell that it can be built without taxpayer funds, according to Sites Project Authority General Manager Jim Watson.
Officials in charge of repairing the damaged spillways at Lake Oroville said they’ve received the needed authorization from state and federal agencies for 2017 construction plans. The plan now is to continue preparing the demolished main spillway for concrete to be poured over the next few weeks.
A new report from a UC Berkeley group researching what caused the Lake Oroville spillway to fail in February is concerned that a green spot on the nation’s tallest dam might mean it is leaking. This is not the first time the “green spot” on the southern end of Oroville Dam has been brought up.
Northern California farmer John Duarte, facing millions of dollars in fines for plowing a Sacramento Valley wheat field, previously sought help from President Donald Trump’s attorney general and EPA chief to get the government off his back. Now Duarte is making an 11th-hour bid for a dismissal of the federal government’s high-profile case against him.
One of the country’s foremost experts on catastrophic engineering failures released a new report Thursday on the troubled Oroville Dam that asks a disturbing question: Is the country’s tallest dam leaking?
State water resources officials and federal regulators caused the failure of the Oroville Dam spillway in February by ignoring long-established guidelines and neglecting their duty to manage risks and detect flaws, a scathing report by a Berkeley engineering expert concluded Thursday.
Construction work on a portion of the Marysville Ring Levee – deemed by a federal agency as the “weakest link” in the city’s levees – began earlier this month along Highway 70. … John Nicoletti, a levee commissioner for Marysville, said the U.S. Army Corps of Engineers has assessed the ring levee and found that Binney Junction is the city’s most vulnerable point.
Many lake users have complained to the state about fewer recreational opportunities on the lake in the aftermath of the Lake Oroville spillway disaster in February. Since then, the lake level has dropped significantly, meaning boaters have farther to walk after parking their vehicles at the high-water line.
In its eighth memorandum released Thursday, the independent board analyzing the redesign of the Oroville Dam spillways commends the construction contractor’s work and makes slight tweaks to former recommendations.
The state Department of Water Resources has filed a request with the Federal Energy Commission to demolish and reconstruct an additional 240 feet of the main Oroville Dam spillway upper chute this season. The purpose of the change is to ensure the reconstruction can be complete in two seasons, per a recent FERC filing.
Congressman Doug LaMalfa doesn’t want a new license issued for Oroville Dam until some safety questions are answered and some commitments are made to local government. LaMalfa, R-Richvale, sent a letter to Federal Energy Regulatory Commission acting Chairwoman Cheryl LaFleur requesting the delay.
The Department of Water Resources have asked federal regulators to let it demolish and replace an additional 240 feet of the spillway’s 3,000-foot concrete chute before the rains comes this fall, leaving less work for next year.
Nearly 80 days after winning the bid to fix the disastrous Oroville Dam spillways, the contractor Kiewit offered the Chico Enterprise-Record and Oroville Mercury-Register Friday a close-up view of construction efforts.
The preliminaries are just about over. Permanent structural repairs are about to begin at Oroville Dam. Five months after an unprecedented emergency forced a mass evacuation, state officials said Wednesday they’re ready to start replacing the now-demolished lower portions of Oroville’s main flood-control spillway.
Anyone who contemplated the wreckage of the Oroville Dam’s main spillway back in February — either while water was pounding down the shattered concrete structure or when the flow was stopped later and the enormity of the damage was fully visible — probably had this thought cross their mind: “That is going to be tough to fix.”
Facing a crisis after a huge crater formed in the main flood-control spillway at Oroville Dam, officials at the California Department of Water Resources called in an old hand to help: David Gutierrez, a nationally known engineer who had just retired as chief of the agency’s dam-safety division.
Inside a cavernous northern Utah warehouse, hydraulic engineers send water rushing down a replica of a dam built out of wood, concrete and steel – trying to pinpoint what repairs will work best at the tallest dam in the U.S for a spillway torn apart in February during heavy rains that triggered the evacuation of 200,000 people living downstream.
Work at the Oroville Dam will carry on in spite of the 110 degree-plus temperatures anticipated this week. There are protections in place for construction employees with the contractor, Kiewit, and concrete has to undergo a cooling techniques to be able to keep applying it, said Jeff Petersen, the company’s project director in a press conference call Wednesday morning.
A California farmer facing a $2.8 million fine for allegedly plowing seasonal wetlands on his 450-acre Tehama County land lashed out Friday against federal prosecutors and bureaucrats for what he called an abuse of government power.
The rush of workers and heavy machinery to the shore of Lake Oroville is so vast and unfamiliar it’s fanning rumors across this rural region that the ruckus couldn’t just be for a historic dam repair. … But as state officials gave The Chronicle a tour last week of the construction site, they said the effort was both extensive and relatively straightforward.
From hundreds of fish annually to nearly 9,000 per year, Butte Creek salmon are thriving, thanks to a project begun 20 years ago. That project was celebrated Thursday at Gorrill Ranch on the Midway. … Bruce Babbitt, Secretary of the Interior for the Clinton administration, helped bring the players to the negotiating table to get the Butte Creek Salmon Recovery Project, completed in the late 1990s.
California farmer John Duarte, facing a hefty fine over water-law violations for plowing a field, wants to call in a big gun in his high-profile court case in Sacramento: Scott Pruitt, the administrator of the U.S. Environmental Protection Agency.
In February, damage to the spillway of the dam on Lake Oroville in Butte County, California, and erosion under the dam’s emergency spillway threatened to send billions of gallons of water cascading through dozens of California communities. The dam did not collapse, but the damage to the spillway and the emergency spillway was enormous.
Quick thinkers who came up with a plan to rescue millions of salmon using fresh water from fire hydrants during the Oroville Dam emergency were recognized for their efforts Sunday by legislators, the state Department of Fish and Wildlife and other entities.
In the latest skirmish over transparency at the troubled Oroville Dam, a Northern California activist group has sued state officials alleging they’re illegally withholding information about potentially toxic asbestos.
State officials released a strategic plan Friday aimed at reducing risks associated with different stages of migration for salmon and steelhead throughout the Sacramento Valley river system. “These resiliency strategies are an exciting new path for improving conditions for fish and wildlife in the Sacramento Valley,” said David Guy, president of the Northern California Water Association.
Pieces of the Feather River Fish Hatchery have been patched back together in time for the return of spring-run chinook salmon. However, the shoveling, shifting and trucking will continue for a while until its smooth swimming for the important fish-rearing station on Table Mountain Boulevard.
State and federal agencies have big plans to change the way water flows through Anderson River Park. … The test pits are being dug to prepare for a project that would create a place where young salmon can eat, grow and get ready for their migration out to the Pacific Ocean, officials said.
The helicopters alone cost more than $100,000 a day at one point. Weeks of dredging debris ran to more than $22 million. And on the day after the massive evacuation, as the crisis was peaking, the state spent $3,902 on breakfasts and lunches for emergency workers.
Not just concrete and rebar, but “human and organizational” factors that could have contributed to the emergency at the Oroville Dam spillway will be included in the investigation currently underway by an independent team of experts assembled by two national dam associations.
If you’re expecting a quick and easy answer on what caused the spillway failure at Oroville Dam, think again. The leader of the independent forensics team studying the Oroville crisis said Thursday that the crack in the dam’s main flood-control spillway likely was caused by a combination of problems.
The Enterprise-Record/Oroville Mercury-Record got its closest look so far Wednesday at the Oroville Dam spillway work on a site visit hosted by the state Department of Water Resources. … The visit included an hour-long meeting in a conference room at DWR’s Oroville headquarters, and a trip to catch a view of lower spillway blasting around 12:30 p.m. followed by access to the structure above the spillway.
John Duarte spent five years fighting the Obama administration’s Justice Department over charges that he broke environmental laws by harming wetlands while planting a wheat crop on his Northern California farm. He lost his case, and faces a $2.8 million fine.
When it comes to repairing the tallest dam in America, sometimes it helps to shrink the problem to a more manageable size. That’s why California water officials are relying on a scale model of the damaged spillway at Oroville Dam to plan their repairs.
State Parks expects a busy Memorial Day weekend at Lake Oroville even with the spillway dominating the news. … A portion of Lake Oroville remains closed as construction continues at the Oroville Dam spillway.
“Four or five Friday nights” of work has paid off for Briana Conners, who recently won $10,000 for her winning entry in a contest seeking proposals to get fish past tall dams like Shasta Dam. … While the U.S. Bureau of Reclamation sponsored the contest to solicit ideas for getting fish around tall dams, the agency is specifically interested in finding ways to get young endangered salmon around Shasta Dam.
The Department of Water Resources invited downstream levee maintaining agencies and county emergency operators to a meeting in Oroville on Monday to discuss ways of improving operations and planning for future emergency situations.
A farmer faces trial in federal court this summer and a $2.8 million fine for failing to get a permit to plow his field and plant wheat in Tehama County. … Because the property has numerous swales and wetlands, [John] Duarte hired a consulting firm to map out areas on the property that were not to be plowed because they were part of the drainage for Coyote and Oat creeks and were considered “waters of the United States.”
State officials plan to stop releasing water down the mangled main spillway at Oroville Dam on Friday, allowing workers to begin months of round-the-clock repairs to the chute and to an emergency spillway that is also badly damaged.
A hole in the concrete spillway chute of the Oroville Dam first made itself known 100 days ago. How it got there is still a mystery, as is what it will cost to fix the resulting damage and whether a fix will be in place in time for the next rainy season.
America’s tallest dam was built from earth, stone and concrete – and the towering ambition of Gov. Pat Brown. Sixty years before a crisis at Oroville Dam sent thousands fleeing for their lives in February, the late governor brought an almost evangelical zeal to erecting the structure that would hold back the Feather River to deliver water to the parched southern half of the state.
There was going to be a steam train – and a monorail. Plus a major resort featuring a 250-seat restaurant and a 1,000-seat amphitheater. As many as 5 million visitors a year would show up. When it came to wooing Butte County about the construction of Oroville Dam, state officials weren’t shy about setting grand expectations.
Trouble had been developing at the Oroville Dam and the main spillway had been shut down; water started flowing over the emergency spillway and the hillside below it started disintegrating at an alarming rate. Late afternoon on Feb. 12, evacuation orders were issued. By most people’s accounts, it didn’t go well.
If a fresh look had been taken at Oroville Dam — any time between 50 years ago and last year — could the breakup of the spillway have been avoided? Is enough being done to ensure that work done today will keep the communities downstream of the dam safe? Should the Department of Water Resources remain in charge of the dam in the future?
The amount of money Donald Trump’s administration reimburses California for repairs to Oroville Dam could depend on whether the state properly maintained the dam’s spillway prior to it crumbling this winter, a state water official told lawmakers Thursday.
As in most of the other community meetings the Department of Water Resources has conducted about the Oroville Dam spillway crisis, staff members Tuesday night offered profuse apologies and community members voiced distrust. … Many of those who stood to speak said they or their families had also been present for the floods of the past (1955, 1986, 1997).
There’s more debris in the water at the Oroville Dam Diversion Pool than initially thought, and state Department of Water Resources officials now don’t expect to complete dredging and hauling of debris by December. DWR is seeking bids for the remaining work.
The massive failure of the Oroville Dam’s main spillway in February involved two dozen potential design and maintenance problems, including thin concrete, inadequate reinforcing steel and weaknesses in the foundation, a panel of engineering experts reported Wednesday.
In a report released Wednesday, engineers assigned to investigate the February failure of Oroville Dam’s main spillway cited a variety of flaws in the 3,000-foot-long structure, including variations in the thickness of the concrete slabs, poor drainage beneath the spillway, improperly filled cracks and signs of inadequate maintenance.
California is putting communities downstream in danger of flooding with the way it runs the now-crippled Oroville Dam, mayors and county leaders wrote this week in a strongly worded letter to Gov. Jerry Brown.
Pursuing exiting the settlement agreement with the state Department of Water Resources was on the table Tuesday night at a special meeting of the Oroville City Council, but the decision was set aside for later. Most of the council expressed interest in gathering more public opinion on the issue before taking a vote, with a town hall date set for May 22 at 5:30 p.m. in the Municipal Auditorium.
California is borrowing up to $500 million to pay for the crisis at Oroville Dam, although it expects to be reimbursed for its costs. … Kiewit Corp. of Omaha, Neb., has won a $275.4 million contract for the repairs, which are expected to take two years.
California is asking the federal government to pay 75 percent of the hundreds of millions of dollars in repairs to the badly damaged spillways at the nation’s tallest dam, a state water agency spokeswoman said Monday.
The independent board overseeing the repair of the damage main Oroville Dam spillway has recommended the state Department of Water Resources change its priorities and focus on the damaged bottom chute rather than the top.
Outside consultants agree with the state’s plan to spend the next two summers replacing sections of Oroville Dam’s still largely intact upper spillway rather than trying to tear it all out in one season. But the public can’t see the recommendations the independent board of consultants gave the Department of Water Resources to ensure the work is safe and sound.
Cindy Messer apologized Tuesday to several hundred grim Oroville residents who had been ordered to run from their homes three months earlier. They sat rigidly in their seats inside the Oroville Municipal Auditorium at the first public meeting Messer’s agency, the Department of Water Resources, has hosted in Oroville since the February crisis at the dam.
Will there be a viewing platform where the public can watch work being done on the Oroville spillway? That’s the plan, according to Cindy Messer, Chief Deputy Director of the Department of Water Resources.
A power industry consulting firm has proposed a design for the Oroville Dam spillways which involves not repairing the current one, but building a new, wider spillway. … Kenneth Viney, manager of CoastalGen Inc., based in Napa, filed suggestions Monday with the Federal Energy Regulatory Commission, or FERC.
“I’m sorry. I’m sorry for the impact on your lives,” Bill Croyle told a crowd of more than 250 people at the Butte County Fairgrounds. Croyle, the acting director of the Department of Water Resources, answered questions and listened Thursday evening as people stepped up to a microphone and were heard during the first of the water agency’s community meetings about the Oroville Dam spillway disaster and evacuations.
California officials are keeping another document on the Oroville Dam recovery sealed from public view but promise to release a redacted version within a week. The Department of Water Resources filed an update Thursday from the outside consultants advising DWR on Oroville repairs.
Two experts weighed in on the memos that the Board of Consultants assessing the current operations and future spillway options sent to the Department of Water Resources. … A former engineer who reviews disasters and a Chico State University engineering professor reviewed the memos and talked to this newspaper about their questions, comments and concerns.
Rivers were swift and wide this winter with heavy storms adding up to the wettest winter in 122 years. People who have lived in the Sacramento Valley for decades remember flooding from their youth, when towns were evacuated, homes were lost and topsoil washed away.
In 2015, a Nevada County man believed to be running a marijuana cultivation site hauled a 500-gallon tank into Yuba County and filled it by diverting water from the Yuba River, which is not illegal under current law. Yuba County supervisors and the district attorney recently signed a letter of support for a bill that would amend the Water Code to address that type of situation.
Members of the state Senate Natural Resources and Water Committee, at an hourlong oversight hearing on the Oroville crisis, questioned Secretary John Laird, the head of the Department of Water Resources and Natural Resources, on the specifications of the $275 million contract awarded earlier this month to Kiewit Corp. of Omaha, Neb., to fix the dam’s two damaged spillways.
For the first time since the Lake Oroville spillway crisis began, members of the state Legislature peppered key water leaders with questions about what happened, what will happen next and what can be learned from it all.
The head of California’s water agency on Tuesday repeated his assertion that an emergency spillway at the Oroville Dam worked, drawing an incredulous response from a state lawmaker who represents tens of thousands of people ordered to evacuate when it was feared erosion at the spillway could lead to catastrophic flooding.
A pair of crippled spillways at Oroville Dam can be repaired in part by November, but a good deal of the work will probably have to be done after the next rainy season, according to reports by an independent panel of experts.
The damage has been done and the repair contract awarded. … How much will be the responsibility of homeowners, businesses, farmers and other customers of the more than two dozen local and regional agencies that contract with the State Water Project?
Official reports released Monday say the catastrophic damage to Oroville Dam’s main spillway probably stemmed from swift water flows under the concrete chute, which was cracked and of uneven thickness.
Responding to criticism about secrecy around the Oroville Dam repair effort, California officials released two redacted reports Monday from outside engineers consulting on plans to fix the dam’s battered spillways.
Citing the near disaster at Oroville Dam, a group of congressional Democrats is pushing the government’s watchdog agency to investigate federal oversight of dam safety regulations. … Separately, the California state Senate Natural Resources and Water Committee will hold an oversight hearing on Oroville next Tuesday [April 25].
A disaster expert’s review of the Oroville Dam spillway emergency says the Department of Water Resources could have prevented everything with better design, better construction and better maintenance. Robert Bea prepared the report published Monday.
A coalition of environmental groups that had warned Oroville Dam’s emergency spillway was fatally flawed long before it nearly washed away this winter is demanding that federal regulators open up dam repair plans for public vetting.
Late in the afternoon of Feb. 12, Sheriff Kory Honea was at the emergency operations center for the tallest dam in America when he overheard someone say something that stopped him in his tracks: “This is not good.”
The company that built one of greater Sacramento’s most important flood-control projects in years will fix the damaged spillways at Oroville Dam, site of a near catastrophe two months ago. … Kiewit has considerable experience with dam projects, including the decadelong, $900 million upgrade of Folsom Dam.
As state officials clamp down on records at Oroville Dam, one of the country’s foremost experts on catastrophic engineering failures has used state inspection reports, photographs and historical design specifications to piece together an autopsy detailing why the spillway at the country’s tallest dam failed so spectacularly this winter.
California water officials Monday awarded a $275 million contract to repair the troubled Oroville Dam to a subsidiary of one of the world’s largest construction companies that is headquartered in Omaha, Nebraska.
Design flaws, construction shortcomings and maintenance errors caused the Oroville Dam spillway to break apart in February, according to an independent analysis by Robert Bea for the Center for Catastrophic Risk Analysis at UC Berkeley.
State officials have reopened the damaged spillway at Oroville Dam as another set of rainstorms began moving across Northern California. … Water will continue pouring down the spillway for up to two weeks, depending on how much more rain falls.
Blowing past state officials’ financial projections, three construction contractors submitted bids for the Oroville Dam repairs that begin at $275 million, the Department of Water Resources said Saturday. … DWR said it would spend the weekend reviewing the bids and declare a winner Monday.
California’s top water official said Thursday he’s considering releasing redacted copies of safety and progress reports at the troubled Oroville Dam after his office had tried to keep them secret because of terrorism concerns.
With stormy weather approaching, state water managers announced Thursday they will resume releasing water down a damaged spillway at the nation’s tallest dam. The badly eroded main spillway at California’s Oroville Dam hasn’t been used since March 27.
It’s not just the residents of Oroville, Gridley and Yuba City who are frustrated with the Department of Water Resources’ lack of transparency concerning the Oroville Dam spillways. Two California legislators who represent those living downstream from the dam are also upset that they aren’t getting answers. … The state Senate’s Natural Resources Committee has a hearing scheduled at 9 a.m. April 25 that will go over what happened with the Oroville Dam spillway.
Gov. Jerry Brown’s administration is using federal security regulations written to thwart terrorism to deny public access to records that experts say could guide repairs to the Oroville Dam and provide insight into what led to the near catastrophic failure of its emergency spillway.
The water agency that supplies drinking water to Los Angeles agreed Tuesday to contribute $1.5 million toward the planning of Sites Reservoir in the Sacramento Valley, giving the agency a toehold in a potentially valuable storage project.
California’s Dept. of Water Resources has announced a fast-track plan to replace the shattered spillways at Oroville Dam — at least partially — by November 1, when the rainy season is expected to resume. Meanwhile, engineers at Oroville Dam are drilling cores and conducting geological studies, hoping to better understand February’s near-catastrophic spillway failures.
Southern California’s most powerful water agency is prepared to invest in Sacramento Valley’s proposed Sites Reservoir, a move that could broaden support for the $4.4 billion project but also raise alarms about a south state “water grab.”
California officials on Thursday announced an ambitious plan to increase the size of Lake Oroville’s damaged main spillway, allowing it to release nearly twice as much water, as they seek to rebuild the 3,000-foot-long concrete chute that gave way this year.
State officials sketched a two-year recovery plan Thursday for the battered Oroville Dam spillway, revealing a blueprint that’s far from complete, still in need of a price tag and certain to leave the structure partially damaged as the next rainy season approaches.
The Department of Water Resources can operate the Oroville Dam project in an emergency capacity until Aug. 24. The U.S. Army Corps of Engineers approved an emergency permit for the state water agency Feb. 24, and it is good for six months.
For the past two years fisheries officials — concerned about the plummeting numbers of winter-run chinook salmon — have gone to the state Fish and Game Commission to get an emergency closure of a section of the Sacramento River in Redding.