Lake Oroville, the second-largest reservoir in California,
reached capacity on Monday for a second straight year after
another relatively wet winter. The rising waters come as state
reservoir managers have been reducing outflows from the lake in
recent weeks — as winter inflows tailed off and the threat
of downstream flooding waned — allowing the reservoir to
slowly fill to its current 899-foot elevation, or 3.52-million
acre-feet of water. … Lake Oroville contains 28% more water
than it historically has on this date. “This is great news
for ensuring adequate water supply for millions of Californians
& environmental needs,” the state Department of Water Resources
posted Monday afternoon on X, formerly Twitter.
The Marin Municipal Water District is bolstering its strategy
on conservation with policy updates and incentive programs
designed to reduce water use by hundreds of millions of gallons
annually. The draft “2024 Water Efficiency Master Plan” is a
playbook that outlines how water is used today in the county,
and how the district can help its 191,000 customers in central
and southern Marin cut back. The plan aims to reduce water use
districtwide by more than 1,000 acre-feet a year starting in
2025, with even greater incremental reduction targets beyond
that. An acre-foot is about 326,000 gallons of water. District
staffers presented the draft plan to the board at a special
meeting on Wednesday.
Grand County and Northern Water have struck a deal that will
send more water running down Western Slope streams to benefit
farmers, boaters and the environment. Grand County in northern
Colorado is home to nearly 16,000 people, part of Rocky
Mountain National Park and the headwaters of the Colorado
River. Each year, four major diversion tunnels take up to
350,000 acre-feet of Colorado River water out of the county and
push it east to the Front Range. Now, the county and the water
provider are agreeing to release water in the opposite
direction, to the west.
As the California State Water Resources Control board meets at
the California Environmental Protection Agency Headquarters for
three days of discussion on its Bay-Delta Water Quality Control
Plan Solano County water officials are there to speak in
opposition to a course of action that could see the county’s
water allocation from Lake Berryessa cut by 75 percent. Chris
Lee and Alex Rabidoux of the Solano County Water Agency
presented information regarding the growth of salmon
populations in Putah Creek in recent years. The state has
claimed that diminished river flows in these areas are harming
fish habitats and are ecologically detrimental to the water
system as a whole, but SCWA argues that Putah Creek is already
a standout example of salmon repopulation.
Already fuller this year than it was at this time a year ago,
Lake Shasta continues to fill, creeping toward the top ―
sometimes rising just inches a day. But by early May, the lake
level is expected to stop rising and the long draw-down of the
lake will begin again and continue through the summer. The lake
is expected to reach about 5 feet from full sometime in early
May, according to Michael Burke, a spokesman for the U.S.
Bureau of Reclamation, which operates Shasta Dam. … Two
years ago, conditions at the lake were dire, with the water
level down to historically low levels. … But with the
lake fuller this year, many water agencies are receiving their
full allotment of water from the bureau.
The governance of San Francisco Bay/Sacramento-San Joaquin
Delta water quality falls under the authority of the State
Water Quality Control Board. Among other duties, the Water
Board is responsible for adopting and updating the Bay-Delta
Water Quality Control Plan for the San Francisco
Bay/Sacramento-San Joaquin Delta Estuary (Bay-Delta
Plan). The Bay-Delta Plan’s purpose sets forth measures
and flow requirements to safeguard various water uses within
the watershed, including municipal, industrial, agricultural,
and ecological needs. Comprising five political appointees with
extensive powers, the Water Board plays a pivotal role in
shaping California’s water management policies. -Written by Cary Keaten, the general manager of
the Solano Irrigation District.
The Bureau of Reclamation today announced the initial 2024
water supply allocations for the Klamath Project along with
$8.5 million in immediate funding for the Klamath Basin
communities to support drought resiliency and $5 million for
Klamath Basin tribes impacted by drought. In partnership with
the Klamath Project Drought Response Agency, Reclamation has
secured $8.5 million for administration of specifically
authorized drought resiliency programs targeted for project
contractors who receive a reduced water allocation. Reclamation
is announcing this funding together with an additional $5
million from separate program sources which will be disbursed
through technical assistance agreements with Klamath Basin
Tribal Nations for drought and ecosystem activities.
The majority of California’s reservoirs are above their
historic average levels following the end of two wet winters.
The state’s largest reservoirs, Shasta Lake and Lake Oroville,
were measured at a respective 118% and 122% of their averages
for early April, according to data from the California
Department of Water Resources. Folsom Lake in the Sierra Nevada
foothills exits early April at 116%. Only two reservoirs, San
Luis in western San Joaquin Valley and Castaic in Southern
California, were below average. San Luis Reservoir was at just
87% and much smaller Castaic Lake in Los Angeles County was at
92%.
Spring storms brought more snow to mountains across the Western
U.S., bringing water for struggling Lake Powell with them. The
National Weather Service Colorado Basin River Forecast Center
on Friday estimated that Lake Powell will receive 5.7 million
acre-feet of water between April and July as snow melts off the
mountains. An acre-foot is roughly enough water to sustain two
houses for a year. That volume is 89% of the normal runoff for
that time period recorded between 1991 and 2020. Facing
extreme drought and climate change since the turn of the
century, Lake Powell dropped to a historic low of 22%
full in Feb. 2023. The reservoir currently stands at
about 32% full.
Last month, the seven U.S. states that use Colorado River water
released two divergent plans for how that water should be
managed after 2026 when the current agreement expires. Their
proposals centered on operations at Lake Powell and Lake Mead,
the country’s two largest reservoirs, the levels of which are
instrumental in determining how much water each state gets. But
a coalition of environmental organizations felt that those
plans — and the discourse surrounding which states should have
to cut their water use — drowned out a crucial consideration:
the environment. So, last week, they submitted a plan of their
own. “Our plan explicitly integrates environmental values and
resources into the planning, while also trying to meet the
needs of people,” Taylor Hawes, the Colorado River Program
director for The Nature Conservancy, said.
Los Angeles Department of Water & Power (DWP) and Mono Lake
Committee staff met this morning at the shore of Mono Lake to
conduct the annual joint reading of the surface elevation of
Mono Lake. The consensus is that the lake stands at 6,383.70
feet above mean sea level which means that Mono Lake is only
halfway to the 6,392-foot elevation level mandated by the
California State Water Resources Control Board 30 years ago to
resolve ecological, wildlife, economic, Tribal, public trust,
and air quality harms caused by the lowering of Mono
Lake. Today’s lake level triggers an important choice for
DWP: Will the Department choose a nearly fourfold increase in
diversions (16,000 acre-feet), or will it choose to leave
exports unchanged (4,500 acre-feet) and preserve the lake level
gains of the record-wet winter of 2023?
It doesn’t look like wastewater will be turned into tap water
in Marin County any time soon. California regulators approved
new rules in December allowing water agencies to purify
wastewater and put it back into the pipes that carry drinking
water to homes, schools and businesses. Officials at the Marin
Municipal Water District said potential projects come with a
high cost and lots of complexities. “Where we stand is we look
forward to continuing to monitor the regulations and larger
agencies,” said Lucy Croy, water quality manager. With that
said, members of the district board said they are interested in
pursuing expansion of its purple pipe system that delivers
recycled water for such purposes as irrigation, toilet flushing
and industrial cooling.
The basin depends on 7,650 acre feet of natural inflow each
year but users pump out nearly 28,000 acre feet annually,
creating a severe overdraft. As the Authority has worked to
comply with the Sustainable Groundwater Management Act (SGMA)
to bring the basin into balance numerous legal actions have
erupted. The Authority restricted pumping for most users. The
U.S. Navy, which operates the China Lake Navale Weapons Base in
the basin, got the lion’s share of pumping. While agricultural
users, such as Mojave Pistachios, which started planting in the
high desert around 2010, received zero pumping allocation.
The Imperial Irrigation District announced in a recent press
report that it has been awarded $7 million in grant funds from
the Department of the Interior in support of the district’s
proposed Upstream Operational Reservoir Project, which would be
the largest reservoir ever constructed in the Imperial Valley
during IID’s 113-year history as an irrigation district. The
announcement was recently made by the Interior Department, with
funds coming from the Bipartisan Infrastructure Law to increase
water supply reliability. This latest grant award to IID is in
addition to a $9.5 million grant previously awarded to the
district for a total of $16.5 million in federal funding for
the Upstream Operational Reservoir Project.
With chronic water shortages afflicting the Colorado River,
discussions about how to cut usage have increasingly focused on
a thirsty crop that consumes an especially large share of the
river’s water: hay that is grown to feed cattle and produce
beef and dairy products. In a new study, researchers found that
alfalfa and other cattle-feed crops consume 46% of the water
that is diverted from the river, accounting for nearly
two-thirds of agricultural water use. The research also shows
that agriculture is the dominant user of Colorado River water,
accounting for 74% of the water that is diverted — about three
times the combined usage of all the cities that depend on the
river. The study presents the most detailed analysis of its
kind to date, including extensive data on where the river’s
water goes across seven Western states and northern Mexico.
… Over the next several years, Pacific Gas and Electric Co.,
the current owner of the Potter Valley Project, is planning to
retire the hydroelectric plant and remove two dams on the Eel
River that provide water for the facility. With power
production shut down, tunneling water into the Russian River
won’t be necessary. … The Potter Valley Project provides a
portion of the water supply for large swaths of Mendocino and
Sonoma counties. … Scores of vineyards here are tethered
to water rights that are subject to restriction when river
levels drop. During the recent drought, hundreds of
water-rights holders were forced to stop pumping — a
scenario many believe was a preview of a future where the Eel
River doesn’t continue to supplement the Russian.
The Marin Municipal Water District is taking a closer look at
storage expansion projects that could increase capacity for
billions of gallons of additional water to defend against
drought. After several months of study, district officials and
consultants are considering projects that could include raising
dam heights and some possibilities for creating new dams. Each
option would increase the storage capacity by about 20,000
acre-feet. The proposals include expansions of Alpine Lake,
Kent Lake and the Soulajule and Nicasio reservoirs. The
district is also looking at constructing new reservoirs in the
areas of Devil’s Gulch, Halleck Creek and upper Nicasio. The
proposals were presented to the water board at its meeting on
March 19.
A government agency that controls much of California’s water
supply released its initial allocation for 2021, and the
numbers reinforced fears that the state is falling into another
drought. The U.S. Bureau of Reclamation said Tuesday that most
of the water agencies that rely on the Central Valley Project
will get just 5% of their contract supply, a dismally low
number. Although the figure could grow if California gets more
rain and snow, the allocation comes amid fresh weather
forecasts suggesting the dry winter is continuing. The National
Weather Service says the Sacramento Valley will be warm and
windy the next few days, with no rain in the forecast.
The growing leadership of women in water. The Colorado River’s persistent drought and efforts to sign off on a plan to avert worse shortfalls of water from the river. And in California’s Central Valley, promising solutions to vexing water resource challenges.
These were among the topics that Western Water news explored in 2018.
We’re already planning a full slate of stories for 2019. You can sign up here to be alerted when new stories are published. In the meantime, take a look at what we dove into in 2018:
People in California and the
Southwest are getting stingier with water, a story that’s told by
the acre-foot.
For years, water use has generally been described in terms of
acre-foot per a certain number of households, keying off the
image of an acre-foot as a football field a foot deep in water.
The long-time rule of thumb: One acre-foot of water would supply
the indoor and outdoor needs of two typical urban households for
a year.
Fashioned after the popular California Water Map, this 24×36 inch
poster was extensively re-designed in 2017 to better illustrate
the value and use of groundwater in California, the main types of
aquifers, and the connection between groundwater and surface
water.
Redesigned in 2017, this beautiful map depicts the seven
Western states that share the Colorado River with Mexico. The
Colorado River supplies water to nearly 40 million people in
Arizona, California, Colorado, Nevada, New Mexico, Utah, Wyoming
and Mexico. Text on this beautiful, 24×36-inch map, which is
suitable for framing, explains the river’s apportionment, history
and the need to adapt its management for urban growth and
expected climate change impacts.
As the state’s population continues to grow and traditional water
supplies grow tighter, there is increased interest in reusing
treated wastewater for a variety of activities, including
irrigation of crops, parks and golf courses, groundwater recharge
and industrial uses.
The 24-page Layperson’s Guide to the State Water Project provides
an overview of the California-funded and constructed State Water
Project.
The State Water Project is best known for the 444-mile-long
aqueduct that provides water from the Delta to San Joaquin Valley
agriculture and southern California cities. The guide contains
information about the project’s history and facilities.
The 24-page Layperson’s Guide to Integrated Regional Water
Management (IRWM) is an in-depth, easy-to-understand publication
that provides background information on the principles of IRWM,
its funding history and how it differs from the traditional water
management approach.
The 24-page Layperson’s Guide to Flood Management explains the
physical flood control system, including levees; discusses
previous flood events (including the 1997 flooding); explores
issues of floodplain management and development; provides an
overview of flood forecasting; and outlines ongoing flood control
projects.
The 24-page Layperson’s Guide to California Water provides an
excellent overview of the history of water development and use in
California. It includes sections on flood management; the state,
federal and Colorado River delivery systems; Delta issues; water
rights; environmental issues; water quality; and options for
stretching the water supply such as water marketing and
conjunctive use. New in this 10th edition of the guide is a
section on the human need for water.
The 24-page Layperson’s Guide to the Central Valley Project
explores the history and development of the federal Central
Valley Project (CVP), California’s largest surface water delivery
system. In addition to the project’s history, the guide describes
the various CVP facilities, CVP operations, the benefits the CVP
brought to the state and the CVP Improvement Act (CVPIA).
The 24-page Layperson’s Guide to the Delta explores the competing
uses and demands on California’s Sacramento-San Joaquin Delta.
Included in the guide are sections on the history of the Delta,
its role in the state’s water system, and its many complex issues
with sections on water quality, levees, salinity and agricultural
drainage, fish and wildlife, and water distribution.
A new look for our most popular product! And it’s the perfect
gift for the water wonk in your life.
Our 24×36 inch California Water Map is widely known for being the
definitive poster that shows the integral role water plays in the
state. On this updated version, it is easier to see California’s
natural waterways and man-made reservoirs and aqueducts
– including federally, state and locally funded
projects – the wild and scenic rivers system, and
natural lakes. The map features beautiful photos of
California’s natural environment, rivers, water projects,
wildlife, and urban and agricultural uses and the
text focuses on key issues: water supply, water use, water
projects, the Delta, wild and scenic rivers and the Colorado
River.
An acre-foot is a common way in the U.S. to measure water volume
and use. It is the amount of water it takes to cover an acre of
land one foot deep. An acre is about the size of a football
field.
An acre-foot of water equals 325,851 gallons, and historically
that was enough to serve the needs of two families for a
year in California.
This printed issue of Western Water examines
agricultural water use – its successes, the planned state
regulation to quantify its efficiency and the potential for
greater savings.
This issue updates progress on crafting and implementing
California’s 4.4 plan to reduce its use of Colorado River water
by 800,000 acre-feet. The state has used as much as 5.2 million
acre-feet of Colorado River water annually, but under pressure
from Interior Secretary Bruce Babbitt and the other six states
that share this resource, California’s Colorado River parties
have been trying to close the gap between demand and supply.