Devastating floods are almost annual occurrences in the West and
in California. With the anticipated sea level rise and other
impacts of a changing climate, particularly heavy winter rains,
flood management is increasingly critical in California.
Compounding the issue are man-made flood hazards such as levee
stability and stormwater runoff.
Two sprawling metropolitan areas offer a glimpse of the future.
One rich, one poor, they sit on opposite sides of the Pacific
Ocean: the San Francisco Bay Area (population 7 million) and
metropolitan Manila (almost 14 million). Their history, their
wealth, and the political and personal choices they make today
will shape how they fare as the water inevitably comes to their
More than $188 million in flood risk management work for
Northern California were outlined in two separate budget
releases on February 10, adding to an already robust Sacramento
District workload. … Continued upgrades to Natomas Basin
levees leads the way with $131.5 million.
Recently, the Department of Water Resources launched a new
safety initiative called Headwaters to Floodplains, which
applies an integrated regional watershed management approach to
the realm of flood management. … At the January meeting of
the California Water Commission, Mike Mierzwa from DWR’s Office
of Floodplain Management briefed the Commission members on the
To adequately prepare for the impacts of sea level rise,
regional collaboration must be enhanced and a considerable
investment by the state is needed and soon, according to the
experts and officials who spoke at a hearing on sea level rise
Friday in Foster City.
Climate change is spurring a new, deep dive into a complex,
little-studied weather system blamed for creating billions of
dollars in flood damage across the western U.S. Atmospheric
rivers are narrow ribbons of concentrated moisture that
originate in the Pacific and can flow thousands of miles before
dropping rain and snow on land.
Like last year, the White House wants to cut all non-defense
discretionary spending by 5%. Non-nuclear spending at the
Department of Energy would be cut 29%, EPA would be reduced by
27%, the Army Corps of Engineers would drop 22% and the
Interior Department would fall by 13%.
More than dust-filled air could be plaguing residents around
the quickly evaporating Salton Sea in Imperial Valley.
University of California, Riverside research shows toxic
aerosols could also be filling the air. The problem has to do
with agricultural fertilizer in the Salton Sea wetland area.
Wildfires can have many detrimental impacts on water supplies.
The effects can last for multiple decades and include drinking
water pollution, reservoir sedimentation, flash floods and
reduced recreational benefits from rivers. These impacts
represent a growing hazard as populations expand, and
communities encroach onto forest landscapes.
The fate of Foster City and the rest of the Bay Area was front
and center last week as state lawmakers grappled with the many
threats California must confront as the ocean pushes farther
inland. A special committee of state lawmakers gathered — for
the second time in two months after years without meeting — to
reignite a much-needed discussion on how to better prepare
communities up and down the coast…
The group called Water Audit California has used lawsuits to
pry water releases from local reservoirs for fish and has
threatened a groundwater-related lawsuit against Napa County.
The group last week co-sponsored a forum to suggest another
This means that the numbers used for the three gages in Tehama
County have different levels for what is considered flood
monitor stage when there is the possibility of flooding, as
well as the level that is considered to be flood stage, said
Cindy Matthews, a senior service hydrologist with the National
When the now-historic finger piers along San Francisco’s
Embarcadero were built, you can bet the builders never expected
that a century later, there would be engineering studies on how
to prepare the gaunt sheds for seas that could rise nearly 7
Researchers at Virginia Institute of Marine Science issued
their annual report card which looked at tide-gauge records for
32 coastal locations, stretching from Maine to Alaska. … The
Bay Area was home to two of those stations: one in Alameda and
one in San Francisco, which both recorded a year-over-year
The Air Force research crew on the WC-130J Super Hercules
airplane was cruising at 28,000 feet over the Pacific Ocean,
preparing to deploy 25 weather-sensing devices over a long band
of water vapor known as an “atmospheric river” when the hazards
of air travel got in the way of science.
“A lot of cities not at risk of sea of level rise will
experience the effect of it,” says Bistra Dilkina, a computer
scientist at the University of Southern California, who led the
study. “This will require an adjustment in terms of the
[increased] demand on the cities’ infrastructure.”
Plans to replace the Lake Wohlford dam are now on hold as
Escondido investigates other, less expensive options because
the projected cost of the project has escalated to more than
$50 million. It was nearly 13 years ago when state inspectors
determined that the top quarter of the dam might liquefy in the
event of a major earthquake…
In November 2018, more than two-thirds of voters passed Measure
W, a comprehensive plan to address how we capture water and how
to reduce our reliance on imported water. Now called the Safe
Clean Water Program, this annual 2.5 cent per impervious square
foot tax for all non-exempt property owners will fund over $250
million dollars annually to build and maintain projects that
capture rainfall and storm water…
Congressional leaders unveiled a transformative vision of
moving America and the environment forward by investing in 21st
century infrastructure. The Moving Forward Framework outlines a
five-year plan for bold investment in transportation and water
An audit of 650 California dams considered hazardous found that
only a small fraction have completed emergency plans required
after the Oroville Dam spillway collapsed three years ago and
forced the evacuation of nearly 200,000 people.
The situation in Australia illustrates a growing global
concern: Forests, grasslands and other areas that supply
drinking water to hundreds of millions of people are
increasingly vulnerable to fire due in large part to hotter,
drier weather that has extended fire seasons, and more people
moving into those areas, where they can accidentally set fires.
The preferred alternative to address seismic safety concerns at
the structure, commonly known as San Luis Dam, involves raising
the crest of the dam by 12 feet, adding shear keys to prevent
slippage and construction of downstream berms to strengthen the
structure… Work on the project is expected to begin in August
The vast majority of California’s major dams aren’t adequately
prepared for an emergency. Three years after the near-disaster
at Oroville Dam, only 22 state-regulated dams have finalized
emergency plans — out of 650 major dams that are required by
law to have plans in place — according to a report issued
Thursday by State Auditor Elaine Howle.
On Sunday, about 300 people filed into the Fleischmann
Auditorium at the Santa Barbara Museum of Natural History in
attendance of a public conversation regarding the aftermath of
the Thomas Fire in December 2017 and January 2018, and the
Montecito mudflows which ensued following a deluge of rain
which extinguished the fires on Jan. 8, 2018.
The 53rd Weather Reconnaissance Squadron’s mission over the
coming months: C-130s — departing from the U.S. Coast Guard Air
Station Barbers Point in Hawaii; or from Travis Air Force Base
in Fairfield — will each release 25 sensors called dropsondes
into a forming atmospheric river system. As the dropsondes fall
from 25,000 feet along two V-shaped paths covering hundreds of
miles, they send back readings on the gathering storm’s water
vapor content, temperature, wind speed and direction.
The multi-year, multi-agency effort to transform the lower
landscape of the Carmel River into a natural floodplain took a
massive step forward Jan. 28 when the Monterey County Board of
Supervisors voted unanimously to approve the project’s final
environmental impact report.
Since 2016, the Yolo County Resource Conservation District has
been leading a project to improve flood escape for wildlife,
implement agriculture-compatible restoration, and engage the
public. This effort will create five miles of cover for
wildlife escaping flood events, enhance year-round habitat for
migratory birds, pollinators and other wildlife…
Large woody debris, sediment and other material washed into the
wetland from the fire-scarred foothills above Carpinteria
during a powerful storm on Jan. 9, 2018. Materials poured from
Santa Monica and Franklin creeks into the marsh. The Thomas
Fire burned more than 28,000 acres in Ventura and Santa Barbara
counties, and the inferno was followed three weeks later by the
flash flooding and debris flows.
By analyzing more than two decades of data in the western U.S.,
scientists have shown that flood sizes increase exponentially
as a higher fraction of precipitation falls as rain, offering
insight into how flood risks may change in a warming world with
My husband and I fell in love a couple of months ago. It was
with a house by a river. This is the river that was a stone’s
throw away when we were engaged 13 years ago. The river we’ve
brought our children to every summer of the past decade. The
river I love to paint, paddle, swim in and stare at. This place
could be our forever home.
The fast-melting ice in the Arctic may be the primary cause of
extreme weather across the globe, including some of the most
violent, damaging storms to hit the Bay Area and California, a
Scripps Institution of Oceanography study has found.
In an effort to aggressively combat the impacts of climate
change on low-lying areas of the Bay Area, the San Francisco
Regional Water Quality Control Board today proposed changes to
the region’s Water Quality Control Plan to better protect
shorelines from sea level rise, storm surges and flooding.
For decades, California’s coastal aquifers have been plagued by
invading seawater, turning pristine wells into salty ruins. But
the state’s coastal water agencies now plan to get more
aggressive in holding back the invasion by injecting millions
of gallons of treated sewage and other purified wastewater deep
The city of Santa Maria is set to begin a native-plant
restoration project on about 150 acres of city-owned land in
the Santa Maria Riverbed, a spokesman announced Wednesday. The
work is slated to begin this week, east of the Highway 101
Last month, high tides in San Francisco Bay washed up onto the
shoreline of a large former pharmaceutical company in Richmond.
A few hours later, the outgoing tide pulled
contamination—including pesticides, toxic chemicals and
radioactive waste—off the industrial land and into the Bay.
Competing plans for “climate resiliency” bonds come from three
sides of state government: the Assembly, the Senate and Gov.
Gavin Newsom. … Resilience projects are aimed not so much at
preventing sea level rise, wildfires, droughts and extreme
heatwaves, but helping people and communities survive.
At a panel discussion hosted by California Natural Resources
Secretary Wade Crowfoot, the panelists discussed how by
spreading out and slowing down water across the landscape can
provide multiple benefits year-round by allowing farmers to
cultivate the land during the spring and summer, and provide
habitat for fish and wildlife in the fall and winter months.
Combined with a safer spillway completed in 2017, federal dam
officials say the flood-prone region is on its way to 300-year
or more flood safety, meaning there will only be a one-in-300
chance in any given year that the combination dam and
downstream levee system will fail.
Santa Barbara County and the U.S. Army Corps of Engineers have
issued notices of violation to Southern California Edison for
its dumping of debris and rocks into Mission Creek near the
Inspiration Point hiking trail. … Mission Creek is Santa
Barbara’s largest creek, flowing from the hills of Mission
Canyon through the heart of downtown and to the Westside. It is
home to steelhead trout among other wildlife.
The conservation district is a special governmental entity that
has been recharging the local groundwater aquifers for 100
years. The Wash Plan will implement water conservation, supply
infrastructure, transportation and aggregate production while
protecting threatened species.
Weak and problematic levees are a big reason why there was so
much destruction when Hurricane Katrina hit New Orleans in
2005. It cost Louisiana and Mississippi more than $150 billion
dollars and killed more than 1,800 people. But could something
like this happen in the Sacramento region? The answer CapRadio
heard from levee experts is yes, Sacramento could see that type
of flooding, but there are a lot of things that lower that
A month-long, emergency construction project has moved the
Merced River away from Hills Ferry Road. Merced County
Supervisor Lloyd Pareira said the road was in danger of being
washed out due to erosion which was creeping ever closer to the
shoulder at a bend where the Merced River flows into the San
Construction projects aimed at providing flood protection to
thousands of Mountain View properties is over budget and more
than a year behind schedule. The Santa Clara Valley Water
District’s board of directors signed off on another round of
funding in November for $4.7 million, aimed at offsetting cost
overruns that ate through most of the project’s contingency
President Trump yesterday touted his repeal of key Clean Water
Act regulations as more than three dozen current and former
government officials called for an investigation into the
scientific basis of his forthcoming replacement rule.
Inside the dome on top of the Penitencia Water Treatment plant
in San Jose is the first permanent x-band weather radar system
in the Bay Area. “The radar system that you see up there is
collecting crucial data as we speak,” said Norma Camacho, CEO
of Valley Water.“ Camacho joined the San Francisco P.U.C.,
Sonoma Water and other partners in unveiling the new system,
which will improve weather forecasting across the region.
Praising progress on a long-awaited Pajaro River flood
prevention project, the Monterey County Board of Supervisors
reviewed a proposed regional flood prevention agency that would
oversee construction and operation of the $393.7 million
initiative. By a unanimous vote, the county board directed
staff to finalize a joint powers agreement at the center of the
proposed Pajaro Regional Flood Management Agency.
The issue, which came in front of the county supervisors
Tuesday, has been “put on pause,” she said, until more
information is available. Specifically, the supervisors are
waiting to make a decision on the moratorium until they know
how many homes have been built in the area in the past two to
three years, and how many more are slated to be built.
Lathrop — like any other community — has a homeless problem.
But unlike other communities, the homeless problem could
imperil the community. That’s because a number of homeless in
the Lathrop area have taken to digging holes into the base of
levees designed to hold back the San Joaquin River at high
The Ono Community Services District has been trying since last
summer to get federal and state money to pay for repairs to the
100-year-old dam, which has holes in its spillway and no other
way to release water after its outlet pipes became plugged with
dirt and debris last spring.
A climate research organization will offer access to a risk
model that predicts the probability of flooding for homes
across the United States, giving the public a look at the data
institutional investors use to gauge risk.
On a stretch of Sunset Beach where the overfull Huntington
Harbour is higher than Pacific Coast Highway, a pump is ready
to keep the road from flooding. In Long Beach, seawater has
overtaken Bayshore Beach. The water laps against Balboa
Island’s recently elevated seawall and it crashes onto the
boulders protecting beachfront homes in Capistrano Beach.
The river barreled over, sinking the streets of Sacramento in
6-feet of water. It was streaming fast, flooding the hotels and
houses of Gold Rush migrants hoping to find fortune in the
bountiful land of California.
The courtroom battle over 9,000-acre Staten Island is the
latest conflict in the Delta over farming, wetlands and aging
levees that, besides preventing flooding, preserve a way of
life on the man-made islands. The suit, filed in 2018 by a
group called Wetlands Preservation Foundation, accuses the
California Department of Water Resources and the Nature
Conservancy of failing to adequately protect wildlife or employ
sustainable agricultural practices on the property…The stakes
are high because the channels, islands and marshes that make up
the Delta are a catch basin for most of California’s drinking
On the anniversaries of the disasters — one on Jan. 10, 2005,
and the other on Jan. 9, 2018 — the two seaside communities are
still grappling with hard decisions stemming from the
destruction and loss of life. Yet they’ve made very different
progress along their paths to recovery.
When most think of the possible impacts of sea level rise, they
think of coastal flooding and the growing risks to shore-based
infrastructure — but there’s another sea level rise-related
threat that is much less talked about. As sea level rises, so
too will groundwater levels in coastal aquifers, and some
recent studies have concluded that in some coastal areas, as
much or more land could flood as a result of rising groundwater
tables than will flood directly from rising tides.
The increasing spills that have polluted the Tijuana River Valley
and ocean off Imperial Beach have resulted in frustration and
anger in recent years, but also triggered broad political
collaboration at the local, state and federal level that has put
the region on the brink of real action.
Nobody seems to know why a rope that caused a nearly weeklong
boil-water advisory in Poway was there in the first place. The
rope had been hanging on a wall in a vault adjacent to the
clearwell drinking water reservoir and a stormwater drain. When
heavy rains on Nov. 28 and 29 caused the stormwater to surge
and back up into the vault, somehow the rope became lodged in a
swing gate allowing muddy water to leak into the reservoir…
King tides, a naturally occurring phenomenon that received a
common name only a decade ago, are heading to California
shorelines this weekend — and with them, a series of public
events intended to show people the dangers posed by sea level
When lawmakers in the House of Representatives approved the
Trump administration’s new trade deal with Mexico and Canada
last month, they authorized $300 million to help fix failing
sewer systems that send raw sewage and toxic pollution flowing
into rivers along the U.S.-Mexico border. … But environmental
groups are condemning the new United States-Mexico-Canada
Agreement, or USMCA, saying it fails to establish binding
standards to curb pollution in Mexico’s industrial zones.
While considerable progress has been made to improve flood
management in the Central Valley, the vast region still faces
significant flood risk. … It has been estimated that
California needs to spend at least $34 billion to upgrade dams,
levees, and other flood management infrastructure.
Accomplishing these upgrades within 25 years would mean
spending $1.4 billion per year—roughly twice the current level
These changes will be substantial, multi-faceted, and often
rapid. Some changes will be irreversible. Many changes are
inevitable. Some will say today’s Delta is doomed. It will be
important for California to develop a scientific program that
can help guide difficult policy and management discussions and
decision-making through these challenges.
It started with last month’s heavy rains that brought an
unprecedented volume of debris tumbling down Tijuana’s Matadero
Canyon: old mattresses, used furniture, discarded construction
material. That led to a clogged storm drain by the border
fence, authorities said, and the flooding of a nearby sewage
pump station. The resulting pool of trash and
sewage-contaminated water has now been raising fears in San
Nearly two months after the Kincade fire was fully contained in
northeastern Sonoma County, Santa Rosa is struggling with an
after-effect of the massive blaze: its wastewater disposal
pipeline at The Geysers was disabled for six weeks, backing up
the Sebastopol-area plant with about 400 million gallons of
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
The low-lying island, as well as neighboring Yerba Buena
island, are also the site of a multibillion-dollar neighborhood
development. The project calls for 8,000 new homes and condos
that could house more than 20,000 people, 500 new hotel rooms,
and over 550,000 square feet of commercial space. But how will
climate change affect these plans?
Atmospheric rivers are long, narrow bands of moisture that
descend from the tropics to higher latitudes like from Hawaii
to California. They used to be referred to mostly as a
pineapple express. … A study by researchers at the Scripps
Institution of Oceanography suggests that one of these events
could cause catastrophic damage to California and its economy
and thus the nation’s economy.
When state lawmakers wondered what they should be doing to
prepare for rising sea levels, they asked their research
experts to dig into the issue. The report is out, and the
conclusions isn’t what one might expect.
Despite efforts over decades, the Delta’s delicate ecosystem
and species continue to decline. … At the 2019 ACWA Fall
Conference, Vice Chair of the State Water Board DeDe D’Adamo,
Department of Water Resources Director Karla Nemeth, and Delta
Stewardship Council Susan Tatayon gave their thoughts on moving
forward in the Delta in this panel discussion moderated by the
Public Policy Institute of California Water Policy Director
Site preparation activity for upcoming levee improvements along
the Sacramento River east levee will begin this week, kicking
off a five-year U.S. Army Corps of Engineers project to upgrade
levees throughout the Sacramento region and widen the
Despite efforts over decades, the Delta’s delicate ecosystem
and species continue to decline. … At the 2019 ACWA Fall
Conference, Vice Chair of the State Water Board DeDe D’Adamo,
Department of Water Resources Director Karla Nemeth, and Delta
Stewardship Council Susan Tatayon gave their thoughts on moving
forward in the Delta in this panel discussion moderated by the
Public Policy Institute of California Water Policy Director
A Placerville development company that illegally discharged
sediment and stormwater from its construction site has agreed
to pay $171,000 in a settlement with the Central Valley
Regional Water Quality Control Board,
U.S. Sen. Kirsten Gillibrand on Tuesday called for more federal
money and oversight to shore up the nation’s aging dams
following an Associated Press investigation that found scores
of potentially troubling dams located near homes and
communities across the country.
Nitrogen pollution, largely from burning fossil fuels,
industrial agriculture and wildfire can reduce drinking water
quality and make air difficult to breathe. Thanks to a $1.1
million grant from the National Science Foundation, we will
soon have a better understanding of how much nitrogen arid
ecosystems can absorb before they produce negative effects.
Passing the new North American free trade agreement would mean
millions of dollars to help upgrade sewage infrastructure on
the border, say the agreement’s backers. But an environmental
group and a local organization on the U.S.-Mexico border say
it’s not enough.
Researchers recently created a scale, similar to the one used
for hurricanes, to categorize the strength and potential
impacts of atmospheric rivers. This system could help
communities prepare and respond to floods, and aid water
managers calculating how much water will be available in any
Lower Butano Creek had been clogged by a mile-and-a-half long
plug of sediment where the stream once flowed through the marsh
to meet the ocean. … In June, the resource conservation
district, in partnership with California State Parks and the
National Oceanic and Atmospheric Administration, embarked on a
$7 million restoration project to remove the sediment dam
blocking Butano Creek.
During the 2019 Flood Prevention Authority Legislative
Conference, the U.S. Army Corps of Engineers presented a
cost-benefit analysis in support of what is estimated to be
about a $394 million project, an effort which would reduce
significant flood risk to the city of Watsonville, Pajaro in
Monterey County and adjacent agricultural areas…
Researchers from the University of California’s Scripps
Institution of Oceanography, in partnership with the Yuba Water
Agency and California Department of Water Resources, will
launch the first in a series of weather balloons near
Marysville Thursday. The research is aimed at better
understanding atmospheric river events, or “epic storms,” that
have created deadly flood events in previous generations.
A state inspection found 12 flaws in Poway’s drinking water
delivery system less than three months before the city’s
precautionary boil water advisory. City officials remain
adamant that the issues raised by the inspection had nothing to
do with the nearly week-long advisory that ended Dec. 6.
We’ve heard this about earthquakes – it’s not a matter of if
but when the big one will hit. Well, some researchers also say
it’s a pretty similar situation for a major flood in the area.
A research project currently being undertaken at SoCal and
NorCal UC campuses is looking at how flooding could impact the
area, including socioeconomic issues.
UC Berkeley engineers have developed a mineral-coated sand that
can soak up toxic metals like lead and cadmium from water.
Along with its ability to destroy organic pollutants like
bisphenol A, this material could help cities tap into
stormwater, an abundant but underused water source.
In the United States, many of the structures that were once
engineering marvels are nearing the age most humans decide to
retire. Despite steadily increased budgets for dam repair and
maintenance, over the past four decades more than a 1,000 have
failed … Although some dams are having critical maintenance
done, states and private entities are also coming up with a
different solution: take them down. California, once a
bastion of dam building, took down 35 dams just last year,
making it the leader in dam removals in 2018.
At 65, Lehrer has become Los Angeles’s doyenne of landscape
design and a leading advocate for green urbanism… But the
main project that Lehrer has been tenaciously, tirelessly
working on for most of her career is the Los Angeles River.
Two wildlife advocacy groups Wednesday announced their intent
to sue the Riverside County Flood Control & Water Conservation
District, as well as other regional and federal government
agencies, for allegedly putting a fish species’ habitat at risk
with the release of water from the Seven Oaks Dam.
Communities sprout up and sometimes wither away, but in 1972,
the small community of Cedar Springs met its demise when it was
swallowed up by a lake. The San Bernardino Mountains community
was located at the confluence of the west fork of the Mojave
River, Sawpit Canyon, and Miller Canyon, about 4 miles
northwest of Crestline. Today, the location is under the waters
of Silverwood Lake, near the boat launch ramp.
The new United States-Mexico-Canada trade agreement reached
Tuesday commits the federal government to provide $300 million
for the Border Water Infrastructure Program to address
pollution on the U.S.-Mexico border, including the Tijuana
River Valley region, where millions of gallons of raw sewage,
heavy metals and other contaminants regularly flow from Tijuana
to San Diego.
In one of the most comprehensive assessments of the crisis that
rising seas pose to California, an influential state panel on
Tuesday urged local officials to take ownership of the issue
and lawmakers to move fast and consider much-needed
legislation. The Legislative Analyst’s Office … found that
the state was already behind on the issue and made the case
that any action — or lack of action — within the next 10 years
could determine the fate of the California coast.
Researchers combed through six years of data, from 2012 to
2018, to examine how L.A. County has mitigated the issue, most
visible in the 72-hour aftermath of rainfall but persists
during dry weather in the form of runoff from driveways and
sidewalks. As it turns out, not much has been done, largely
because of a lack of transparent requirements when it comes to
the monitoring of stormwater pollution by various
It came as a bittersweet surprise to biologists and government
agencies monitoring the steadily shrinking Salton Sea’s slide
toward death by choking dust storms and salt. Thousands of
acres of exposed lake bed have become, of all things, the
unintended beneficiaries of lush marshlands that are homes for
endangered birds and fish at the outlets of agricultural and
urban runoff that used to flow directly into the Salton Sea.
Pummeled by fires, drought and floods, California’s Democratic
primary voters put fighting climate change at the top of their
list of issues for the next president to tackle. Nearly half of
likely Democratic primary voters call the issue the No. 1
priority for the next president, according to a new statewide
Dr. Rachel Johnson is a research biologist with the NOAA’s
National Marine Fisheries Service and UC Davis with over 15
years’ experience working on various aspects of conservation
and fisheries biology. In this presentation from the 2019 State
of the Estuary conference, Dr. Johnson discussed the importance
of developing a holistic framework among aquatic ecosystems and
It was welcome news for Kern County farmers, but word last week
that the process of fixing the Friant-Kern Canal has finally
begun may have obscured the fact that a great deal of work lies
ahead — including finding money to complete the job.
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.
The report by the Environmental Integrity Project released on
Thursday showed some 30 states have reduced funding for
pollution control programs, 16 of them by more than 20%. Forty
states, meanwhile, have cut staffing at environmental agencies,
half of them by at least 10%, the report showed.
The Supreme Court today will weigh in a closed-door conference
whether to take up a dispute over states’ role in water
permitting for pipelines, hydroelectric dams, and other
projects. … The question in the case is whether states
unlawfully extended their review time for a hydropower project
on the Klamath River. It’s an issue that has cropped up in
litigation over pipelines and other projects.
In a study published Wednesday in Science Advances, researchers
found that from 1978 to 2017, atmospheric rivers accounted for
$42.6 billion in flood damage in 11 Western states — 84% of the
estimated total water-related damage of $50.8 billion. That’s
roughly $1.1 billion in damage done by atmospheric rivers every
The City Council will certify the Water Quality and Flood
Protection Initiative at its Dec. 17 meeting after Alameda
property owners voted in favor of a fee hike. … The increased
fee will fund repairs and new pump stations, which is vital to
combat potential flooding as sea levels rise; improve lagoon
systems, enhance street sweeping procedures and maintain and
install new trash capture devices. These devices are key to
keeping the shoreline free of trash and other debris.
As land around the Bay was developed, creeks were rerouted
underground through pipes called culverts for flood protection.
But in some spots, these hidden waterways can be brought back
up to the surface to provide habitat for wildlife and respite
for people. The Bay Area is a national leader in this type of
restoration, which is aptly called daylighting. And now we’re
undertaking our most ambitious such project yet.
The steady rain prompted the weather service to issue flash
flood watches through noon for burn areas across Santa Barbara
and Ventura counties, including the Cave, Maria and Easy fire
burn scars. … Rainfall totals of 1 to 2 inches are expected
for much of the region, but the San Gabriel Mountains could see
up to 3 inches of precipitation.
Rains caused storm drains to back up into Poway’s water
treatment facility, officials said. Crews are working around
the clock to clean and flush the system, which may take two to
five days before the water is declared safe. The county health
department ordered the closing of all restaurants in the city
and residents are being advised to boil their tap water before
drinking it or using it for cooking, city officials said.
They’re like a continuous conga line of moisture streaming
across the ocean without interruption until they encounter an
obstacle such as the coast ranges in California. These
obstacles force the atmospheric river to start shedding its
burden of moisture.
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.
For as far as I could see, east and west, the banks were
littered with plastic cups, fast-food containers, spray paint
cans and chip wrappers. It had rained a smidgen the day before,
the first wet weather of the season, and this was what had
washed downstream from the area west of downtown Los Angeles.
Through a variety of panel discussions, presentations and a
showcase of student research, the Re:Border conference is
exploring how San Diego State University and its regional
partners can contribute to innovative solutions for
water-related challenges in the transborder region.
A bi-national conference at San Diego State University was
aimed at analyzing water resources in the Baja California and
San Diego border region where challenges include cross-border
pollution and water scarcity… Experts at the Reborder 2019
conference discussed ways to improve regional access to “a
secure and reliable water supply” through wastewater treatment
With winter rains on their way, officials worry a dam that
creates a small lake 17 miles west of Redding could collapse,
inundating downstream homes with up to 20 feet of water if
sediment and debris clogging two outlet pipes is not cleared.
Two 30-inch outlet pipes at Misselbeck Dam have been clogged
with silt and debris since last summer, forcing water from
Rainbow Lake to flow over the top of a deteriorated
Known as Forecast-Informed Reservoir Operations (FIRO), the
approach centers on using the latest forecast technology to
plan for the arrival of atmospheric rivers. Those are the
torrents of moisture in the sky that barrel into California
from the Pacific Ocean. Atmospheric rivers are critical to the
state’s water supply, accounting for as much as half of its
annual precipitation. But they can also cause catastrophic
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.
Many of California’s watersheds are
notoriously flashy – swerving from below-average flows to jarring
flood conditions in quick order. The state needs all the water it
can get from storms, but current flood management guidelines are
strict and unyielding, requiring reservoirs to dump water each
winter to make space for flood flows that may not come.
However, new tools and operating methods are emerging that could
lead the way to a redefined system that improves both water
supply and flood protection capabilities.
Through financial support from various grant funding, CDFA is
implementing a five-phase process for nutria eradication that
consists of survey, knockdown, mop-up, verification, and
surveillance. CDFW staff have been working the landscape by
dividing areas into 40-acre grids to ensure that nothing is
State transportation crews are wrapping up paving and drainage
improvement work along Highway 37 ahead of winter rains in an
attempt to avert flooding, which in two of the past three years
led to multiday closures of the critical North Bay commuter
The extra 90 cubic feet per second are designed, in part, to
attract salmon up the creek – and the flows start a little
later than in recent years due to the failure of state
Department of Fish and Wildlife pumps in the Yolo Bypass. Rich
Marovich, streamkeeper for the Solano County Water Agency
and Lower Putah Creek Coordinating Committee, said because
it has been so dry this fall, the later release may be
The start of work on the restoration of the Bel Marin Keys
wetlands is another example of efforts to bring back the miles
of wetlands that, over the past century, have been lost to
development, other encroachments and years of sedimentation
The Sacramento-San Joaquin Delta is hitched to so many things.
Our estuary is a critical habitat for fish and wildlife, home
to millions of people, and the hub of our state’s water
delivery system. From the Sierra Nevada to the mouth of the San
Francisco Bay, what happens in one part of the Delta watershed
affects the entire estuary.
Small shallow lakes dominate the world’s freshwater area, and
the sediments within them already produce at least one-quarter
of all carbon-dioxide, and more than two-thirds of all methane
released from lakes into our atmosphere. The new research,
published in the journal PNAS, suggests that climate change may
cause the levels of greenhouse gases emitted by freshwater
northern lakes to increase by between 1.5 and 2.7 times.
Sasha Gershunov, of the Scripps Institution of Oceanography at
UC San Diego, is one of the nation’s experts on atmospheric
rivers. ARs are one of the planet’s most extreme weather
events, he said, and their impact on the state is both good and
bad. They’re a critical source of water for the Golden State’s
bountiful agriculture, thick forests and ecosystems, snowpack
and drinking supplies, dropping 50% to 60% of the entire
state’s annual precipitation.
More than 7 million Californians live in places that are at
risk of flooding. But not every community is well prepared to
recover from floods. A new study, headed by experts at the
University of California, Irvine (UCI), is looking at how
flooding affects social inequality in flood-prone parts of the
state. We talked to project leads Richard Matthew and Brett
Sanders about the issue.
Even today, with all we know about the challenges posed by
climate change and sea-level rise, some cities seem determined
to continue to fill and develop their shorelines. One of the
most flagrant examples is taking place in the city of Newark…
The plan includes objectives such as recycling 100% of
wastewater along the coast by 2040, requiring the use of
nitrate removal technology at wastewater treatment plants,
establishing a state program for wetlands restoration and
creating a state fund to help coastal communities respond to
sea level rise without using harmful tactics like sea walls.
A living shoreline is an alternative to ‘hard’ shoreline
stabilization methods like rip rap or seawalls, and can provide
numerous benefits such as nutrient pollution remediation,
habitat, and buffering of shorelines from storm erosion and sea
level rise. … At the 2019 State of the Estuary conference,
Marilyn Latta from the Coastal Consevancy and Katharyn Boyer
from San Francisco State University gave a presentation on
living shoreline projects in the San Francisco Bay.
A local coalition formed in the hopes of maintaining the most
important aspects of the Potter Valley Project is making
progress toward a two-basin solution, Janet Pauli told the
Ukiah City Council at its last meeting.
The streamlined permitting process is an important component of
Sustainable Groundwater Management Act implementation, as it
may assist Groundwater Sustainability Agencies in more
efficiently obtaining the necessary water rights to divert and
recharge water during high flow events.
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.
On Thursday, the East Bay city of Newark will consider
approving 469 single family homes and 2,739 parking spaces at
the edge of the San Francisco Bay shoreline, on a 430-acre
parcel where conservation groups and state and federal agencies
have for decades hoped to restore wetlands. … The proposal
illustrates one way even straightforward and widely agreed-upon
regional climate solutions can fall apart at the local level…
The intensity of wildfires in places like California are a
symptom of climate change, experts say, but the whiplash effect
poses a different set of problems for humans and natural
systems. Researchers project that by the end of this century,
the frequency of these abrupt transitions between wet and dry
will increase by 25 percent in Northern California and as much
as double in Southern California if greenhouse gasses continue
The construction of dams on rivers worldwide has stopped the
natural flow of sand and silt to the sea—resulting in coastal
wetland loss and disappearing beaches—as well as preventing
fish from reaching vital spawning grounds. But when the
decision is made to remove a dam it can be remarkably
challenging. Just ask the people of Ventura, California, who’ve
been trying for 20 years…
Instead of pushing efforts to restore wetlands and wildlife
habitat to help our region become more climate resilient,
developers and city leaders are pushing to advance plans to
fill in Newark’s Bay shoreline. The proposed “Sanctuary West
Residential Project,” would build 469 luxury units along the
City of Newark’s shoreline on a 559-acre site…
While breaking this levee would seem like a catastrophe, state
and federal agencies intend to do just that. The purpose is not
to unleash some biblical, punishing flood, but rather to allow
nature to reclaim nearly 1,600 acres of wetland habitat.
A review of federal data and reports obtained under state open
records laws identified 1,688 high-hazard dams rated in poor or
unsatisfactory condition as of last year in 44 states and
Puerto Rico. … In California, six high-hazard dams were rated
as poor or unsatisfactory, including Oroville, which failed in
2017 and prompted mass evacuations downstream.
Much of California enjoys a mild Mediterranean climate where
the weather typically swings like a pendulum from warm, dry
summers to cool, wet winters. … While the pendulum has
always swung here, there’s evidence that its swings are now
getting more dramatic, and anyone who’s lived here in the last
few years has seen it firsthand.
Boeing worked with the state and installed a massive system of
plastic pipes, treatment systems and holding ponds meant to
filter and manage potentially toxic rainwater before it poured
downhill… Then the giant Woolsey Fire ignited at the
old laboratory… Flames destroyed plastic piping and tore
through the storm water system before ravaging another 94,000
acres as the fire stormed west to the sea, according to state
and Boeing records.
The lessons gained from the 2018 wildfires that swept through
Paradise, in Northern California, and along the Los
Angeles-Ventura County border in Southern California are still
being absorbed by water managers around California as they
recognize that the old emergency preparedness plans of
yesterday may not be adequate for the new wildfire reality of
Here’s the scariest part: What’s happening in California is not
an isolated problem. From saltwater-ravaged tunnels in New York
to flooding in Houston to water loss along the Colorado River,
it is clear that we did not design our infrastructure and
communities to manage our new climate realities. While Congress
and statehouses across the country debate how much to spend on
traditional repairs and maintenance, we ignore a more
fundamental question: What will it take to redesign our entire
approach to infrastructure for an era of climate insecurity?
On a secluded corner of Marywood Drive in Paradise sit two
vacant lots, side by side. The empty space used to hold
single-family residences surrounded by Ponderosa pines. That
was until the November 2018 Camp Fire — California’s deadliest
and most destructive wildfire — leveled the Butte County town
and destroyed more than 13,000 homes. Now, one year later,
these lots are being rebuilt by two Paradise natives, Christine
and Dave Williams, who bought the properties after the fire.
The Groundwater Resources Association’s 2019 Western
Groundwater Congress featured David Sandino, Senior Staff
Counsel at the Department of Water Resources, who spoke about
the disconnect between legal groundwater systems and how the
system actually works; and Maurice Hall, Associate Vice
President of Ecosystems-Water at the Environmental Defense
Fund, who spoke of how more holistic and inclusive groundwater
management can increase the resilience of our water supply…
In response to concerns about power outages, wildfires and the
water used to put them out, local water officials unveiled
details of an emergency plan Tuesday, explaining how SCV Water
is prepared for emergencies.
Woodland city officials are continuing to build the case for
Cache Creek flood control, recently approving $900,000 for
another study that could be yet another downpayment on a
multi-million dollar project ultimately paid for by federal,
state and local governments.
The Metropolitan Water District of Southern California is
expanding its effort to learn more about the water supply
potential of local stormwater capture with a new $7.5 million
pilot programapproved today by its board of directors.
Federal engineers have found that a dam protecting the high
desert communities of Victorville, Hesperia, Apple Valley and
Barstow falls short of national safety standards and could
erode and collapse in an extreme flood, inundating thousands of
Flood-managed aquifer recharge involves moving floodwater from
surface streams onto land where it could percolate into a
groundwater basin. Though the concept sounds simple, it brings
complications that include managing the floodwater, finding
appropriate land to accept it and establishing rights to the
A state agency cannot make the federal government dredge two
vital San Francisco Bay channels more frequently, a federal
judge ruled Monday, despite arguments that less dredging could
increase the risk of a container ship accident or oil spill.
Casting climate change as a direct threat to California’s water
security, a panel of experts on Tuesday said the state must
plan for the “new normal” by modernizing water infrastructure
before the next great disaster.
The executive director of the San Mateo Resource Conservation
District was admiring the restoration of 8,000 feet of the
Butano Creek stream channel, the largest and most ambitious of
a series of projects the district is spearheading to stop
chronic flooding, bring back endangered fish and restore 28
acres of degraded wetlands at Pescadero Marsh Natural Preserve.
Jaime Bonilla was sworn into office Friday as governor of
California’s neighboring Mexican state. … In his first major
speech since taking office, Governor Bonilla promised to
address poverty, public safety issues and end cross-border
sewage flows within six months. Bonilla, a dual U.S.-Mexico
citizen, formerly served as an elected member of the Otay Water
District in Chula Vista.
In the long run, the biggest news from Monday’s Bishop City
Council meeting may be that Los Angeles Department of Water and
Power could consider selling the land being used for waste
water discharge by both the City of Bishop and the Eastern
Sierra Community Service District.
The U.S. Army Corps of Engineers announced that it has changed
its risk characterization of the Mojave River Dam from low to
high urgency of action. The earthen dam was built in the 1970s
near the San Bernardino Mountains northeast of Los Angeles. It
was designed for flood control and is usually dry.
San Marcos will start construction of its Creek District this
year, with a $100 million plan to reduce flooding and improve
habitat and traffic flow, officials said at a public forum
earlier this week.
In order to take care of environmental concerns and maintain
our facilities in a safe and effective manner, we have
identified about 900 encroachments on public lands managed by
Valley Water that require resolution. … Valley Water has
implemented a new process to resolve these encroachments by
working with our community.
California regulations protecting wetlands and state waters
were approved by the State Water Resources Control Board and
will take effect on May 28, 2020. These new rules create a more
expansive and complex permitting scheme for developers, public
agencies and others with projects that may impact waters and
The Ojai Valley agency planned a roughly $1 million project to
clear part of a 9-foot pile of silt, sand and gravel from
its Robles diversion facility. … Without the work, Casitas
officials said they could face emergency shutoffs,
clogged fish screens and lost water this winter.
Get ready for a surge of lawsuits over the Trump
administration’s decision to walk back Obama-era protections
for wetlands and streams. … The cases add a new dimension to
what could soon be a complicated legal quagmire over the Obama
administration’s WOTUS rule and the Trump administration’s
efforts to both erase and replace the regulation.
California is chock full of rivers and creeks, yet the state’s
network of stream gauges has significant gaps that limit
real-time tracking of how much water is flowing downstream,
information that is vital for flood protection, forecasting
water supplies and knowing what the future might bring. …
Nearly half of California’s stream gauges are dormant.
California is chock full of rivers and creeks, yet the state’s network of stream gauges has significant gaps that limit real-time tracking of how much water is flowing downstream, information that is vital for flood protection, forecasting water supplies and knowing what the future might bring.
That network of stream gauges got a big boost Sept. 30 with the signing of SB 19. Authored by Sen. Bill Dodd (D-Napa), the law requires the state to develop a stream gauge deployment plan, focusing on reactivating existing gauges that have been offline for lack of funding and other reasons. Nearly half of California’s stream gauges are dormant.
The National Wildlife Federation, Natural Resources Defense
Council, and nine other groups sued Oct. 23 in the U.S.
District Court for the District of South Carolina, accusing the
federal government of breaking the law in its rollback of the
2015 Clean Water Rule.
Santa Fe Dam is an element of the Los Angeles County Drainage
Area (LACDA) flood control system. Watersheds are more than
just drainage areas in and around our communities. They are
necessary to support habitat for plants and animals, and they
provide drinking water for people and wildlife.
Scientists examined 33 El Ninos — natural warming of equatorial
Pacific that triggers weather extremes across the globe — since
1901. They found since the 1970s, El Ninos have been forming
farther to the west in warmer waters, leading to stronger El
Ninos in some cases.
Warmer-than-average temperatures are forecast for much of the
U.S. this winter according to NOAA’s Climate Prediction Center.
… Drier-than-average conditions are most likely for
Louisiana, parts of Texas, Mississippi, Arkansas and
Oklahoma as well areas of northern and central California.
Two top officials at the California Coastal Commission blasted
Del Mar this week for continuing to reject “managed retreat” as
an option to deal with sea level rise, saying they hope the
city will reconsider its stance.
Aging water treatment systems, failing pipes and a slew of
unregulated contaminants threaten to undermine water quality in
U.S. cities of all sizes. … Still, with only a handful of
exceptions, “water systems aren’t designed to focus on health,
they’re focused on cost-containment,” says Seth Siegel, whose
book “Troubled Water,” released this month, examines the
precarious state of water infrastructure in the U.S.
Elizabeth Castillo looks on as her daughter Reynata plays with
children at a playground near the Los Angeles River in Long
Beach, California, in mid-October, hoping one day the river
will be clean enough to kayak on. … In the last half-century,
the LA River served primarily as flood control infrastructure,
but open space and wildlife advocates fomented a movement to
make it wild and accessible to all.
Alameda property owners are being asked whether they are
willing to pay more to maintain and upgrade the city’s aging
stormwater system. … The reason? The city’s stormwater fund
is running a $1 million annual deficit and the system needs
about $30 million in upgrades, including at its pipe stations,
some of which date to the 1940s…
To survive the next drought and meet the looming demands of the
state’s groundwater sustainability law, California is going to
have to put more water back in the ground. But as other Western
states have found, recharging overpumped aquifers is no easy
The White House has begun reviewing a plan to change the way it
issues environmental permits for infrastructure projects. If
the proposal is finalized, it could speed up National
Environmental Policy Act reviews for roads, bridges, ports,
pipelines, power lines, Internet trunks, and water systems.
Stop me if you’ve heard this one before: Critical U.S.
infrastructure is dilapidated and unsafe. Regulation is week,
and enforcement is weaker. Everyone agrees on the need for
action, and climate change will only make the problem worse.
but no one seems to do anything about it. Sadly, this has
become a familiar story. Take dams for instance.
The ample rainfall in Marin County this past water year has
acted as a double-edged sword. While the storms that touched
down in the winter and spring filled reservoirs and moistened
vegetation, they also created more fire fuel that is now
beginning to fully dry out during what firefighters are calling
a critical period in the fire season.
The project includes improvements along more than 3 miles of
dirt roads, repairing culverts and building erosion control
features designed to reduce sediment flow into the creek. The
aim is to protect gravel nests, called redds, where female
salmon and steelhead lay their eggs, suffocating the eggs as
well as clogging the gills of adult fish…
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.
Lake Mendocino made it through a typically long, hot summer
with an abundance of water and now, thanks to an ongoing
experiment with high-tech weather forecasting, the reservoir
can retain more water through the winter, benefiting people,
fish and farmers along the Russian River.
A tiny fiberglass island is bobbing up and down in the San
Francisco Bay right now. From far away, it looks like a beluga
whale poking through the water. Up close, it looks like a
misshapen raft. In reality, it’s a buoyant structure known as
the “Float Lab,” which is designed to foster a floating
The number of wildfires burning across the western United
States over the past 6 decades has been steadily increasing,
and those fires are growing larger and more severe, especially
in mountain areas where more than 65% of clean water resources
for the West’s 75 million people originate. What happens when
fires intersect water resources is the subject of two new
papers in Hydrological Processes.
Nearly 600 former Environmental Protection Agency officials are
calling on Congress to investigate the Trump administration’s
“inappropriate threat of use of EPA authority” against the
state of California over recent environmental policies.
Drainage in Southern California was built around getting storm
water to the ocean quickly, but we now know that slowing down
these flows and encouraging water to soak into the groundwater
basin is preferable.
Concerned that rising waves will flood runways and buildings in
the coming years, officials at San Francisco International
Airport are moving ahead with a $587 million plan to build a
major new sea wall around the entire airport.
Researchers at the University of California, Irvine are leading
a new project with three other UC campuses to study the impact
of coastal flooding on disadvantaged communities in California.
… The effort will employ advanced simulation systems to
deepen understanding of increasing flood risks within the
state’s two most imperiled areas: Greater Los Angeles and the
Sacramento-San Joaquin River Delta.
To survive the next drought and meet
the looming demands of the state’s groundwater sustainability
law, California is going to have to put more water back in the
ground. But as other Western states have found, recharging
overpumped aquifers is no easy task.
Successfully recharging aquifers could bring multiple benefits
for farms and wildlife and help restore the vital interconnection
between groundwater and rivers or streams. As local areas around
California draft their groundwater sustainability plans, though,
landowners in the hardest hit regions of the state know they will
have to reduce pumping to address the chronic overdraft in which
millions of acre-feet more are withdrawn than are naturally
Explore the Sacramento River and its tributaries through a scenic landscape as we 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. Tour participants will get an on-site update of Oroville Dam spillway repairs.
The removal of the Upper York Creek Dam will not begin in 2019
as previously planned, but the project is still on schedule to
be complete by the end of 2020. … The city now plans to do
both phases in 2020, after last-minute design changes failed to
win regulatory approval in time for the 2019 construction
season ending Oct. 31.
California’s largest inland lake, the Salton Sea, lies in the
Imperial and Coachella valleys. The lake, which is more than 50
percent saltier than the Pacific Ocean, is becoming more salt
than water because it’s essentially evaporating. The lake and
the area that surrounds it — once hotspots for tourism and
wildlife — have essentially become ghost towns.
Success Dam is now Richard L. Schafer Dam. The dam, which has
shielded the San Joaquin Valley floor from Sierra snowmelt
while providing much-needed irrigation water to Tulare County
farmers since 1961, was rechristened in a crowded ceremony
along Lake Success last week. Schafer has served as the Tule
River Water Master since 1963.
Pulling weeds is not usually a great way to start a party. But
filling a dumpster with invasive species was just the right
activity to commemorate the 10th anniversary of Tijuana River
Action Month on Saturday.
Anthony Burdock, Project Manager for the Isabella Dam Safety
Modification Project, presented a program outlining
catastrophic dam failures and how those failures were used to
mold the dam safety regulations that now govern the nation’s
dams, including Isabella Dam.
Just how far will Gov. Gavin Newsom go in his high-profile
fight with the Trump administration over environmental
protections? The next few months will provide an answer, as
Newsom is forced to take a stand on Trump rollbacks in a
long-contested battleground — the Northern California Delta
that helps supply more than half the state’s population with
drinking water and fills irrigation canals on millions of acres
Environmental groups that have long pushed to bring down a huge
dam along the Colorado River are suing the federal government,
alleging it ignored climate science when approving a 20-year
operating plan for the dam near the Arizona-Utah border.