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Published: Tuesday, August 12, 2014, 12:47 p.m.

Southwest braces as Lake Mead water levels drop

  • Lightning strikes over Lake Mead near Hoover Dam at the Lake Mead National Recreation Area in Arizona on July 28. At left are the Arizona intake tower...

    John Locher / Associated Press

    Lightning strikes over Lake Mead near Hoover Dam at the Lake Mead National Recreation Area in Arizona on July 28. At left are the Arizona intake towers of Hoover Dam. The bathtub ring of light minerals shows the high water mark of the reservoir, which has shrunk to its lowest point since it was first filled in the 1930s.

  • What was once the Echo Bay Marina sits high and dry next to Lake Mead in the Lake Mead National Recreation Area in Nevada.

    John Locher / Associated Press

    What was once the Echo Bay Marina sits high and dry next to Lake Mead in the Lake Mead National Recreation Area in Nevada.

LAS VEGAS — Once-teeming Lake Mead marinas are idle as a 14-year drought steadily drops water levels to historic lows. Officials from nearby Las Vegas are pushing conservation, but are also drilling a new pipeline to keep drawing water from the lake.
Hundreds of miles away, farmers who receive water from the lake behind Hoover Dam are preparing for the worst.
The receding shoreline at one of the main reservoirs in the vast Colorado River water system is raising concerns about the future of a network serving a perennially parched region home to 40 million people and 4 million acres of farmland.
Marina operators, water managers and farmers who for decades have chased every drop of water across the booming Southwest and part of Mexico are closely tracking the reservoir water level already at its lowest point since it was first filled in the 1930s.
“We just hope for snow and rain up in Colorado, so it’ll come our way,” said marina operator Steve Biggs, referring to precipitation in the Rockies that flows down the Colorado River to help fill the reservoir separating Nevada and Arizona.
By 2016, continued drought could trigger cuts in water deliveries to both states. While water authorities say they’ve been saving water for potential dry days, the prospect of the first cuts is already prompting action.
“I’ve downsized in the last couple of years, probably a good thing the way this water shortage is going,” said farmer Dennis Bagnall, who has planted just 225 of the 1,500 acres that are typically green this time of year on his farm south of Phoenix.
Last week, officials announced an $11 million pilot program involving the federal government and water agencies in Denver, Los Angeles, Las Vegas and Phoenix to pay farmers, cities and industries to reduce river water use.
“We can certainly hope for better conditions than we’ve experienced in recent times, but we have to actively and continue to plan for the worst case,” said Michael J. Lacey, director of the Arizona Department of Water Resources.
This week, an update from the federal Bureau of Reclamation, the keeper of the Colorado River network’s dams and reservoirs, will help set the course for water deliveries for the next two years. Administrators say they’re confident they can meet current commitments next year.
Federal officials and water administrators in metro areas such as Las Vegas and Phoenix say they’re committed to finding new ways to make every drop of river water count — from cloud seeding to pipelines to new reservoirs to desalination plants.
They point to agreements to leave surpluses unused in wet years, share pain in dry years and buy water designated for farms for city use.
But they’re all watching Lake Mead, the biggest in a Colorado River basin that supplies water to California, Arizona, Colorado, New Mexico, Nevada, Utah, Wyoming and part of Mexico. The states get annual allotments dating to the Colorado River Compact of 1922.
Over the years, the amount hasn’t kept pace with a post-World War II development boom in the Southwest, and pressure has increased with drought gripping the region for almost 15 years.
The effect of increased demand and diminished supply is visible on Lake Mead’s canyon walls. A white mineral band often compared with a bathtub ring marks the depleted water level.
The lake is expected to drop to 1,080 feet above sea level this year — down almost the width of a football field from a high of 1,225 feet in 1983.
A projected level of 1,075 feet in January 2016 would trigger cuts in water deliveries to Arizona and Nevada.
At 1,000 feet, drinking water intakes would go dry to Las Vegas, a city of 2 million residents and a destination for 40 million tourists per year that is almost completely dependent on the reservoir.
That has the Southern Nevada Water Authority spending more than $800 million to build a 20-foot-diameter pipe so it can keep getting water.
The region is also stressing water conservation, prohibiting grass lawns for new homes and fountains at businesses. Officials say the overall effort has reduced consumption 33 percent in recent years while the Las Vegas area added 400,000 residents.
But severely restricting water use for swimming pools or lawns in a city like Phoenix wouldn’t make much difference, said Kathryn Sorensen, the city’s Water Services Department director, because conservation efforts need to be applied across the western U.S.
“The solution can’t come just from municipal conservation; there isn’t enough water there,” she said.
If cuts do come, they’ll test the agreements forged in recent years between big, growing cities and farmers.
In California, home to 38 million residents, farmers in the sparsely populated Imperial Valley in southeast California have senior water rights ensuring that they get water regardless of the condition.
Kevin Kelley, general manager of the Imperial Irrigation District, defends his agency’s position at the head of the line and dismisses the idea that water should go to those who can pay the most or make the most compelling economic argument.
Imperial Valley farmers grow some 200 crops, Kelley said, from alfalfa to cotton and celery to zucchini. “There has to be a place in a diverse economy and a diverse Southwest for a place like this that grows food and fiber year-round,” he said.
In Arizona, reduced deliveries of Colorado River water would largely affect the Central Arizona Project, which manages canals supplying 80 percent of the state’s population. A tiered system means farmers would face cuts first, shielding Native American tribes and big cities.
Bagnall, who owns Morningstar Farms in Coolidge, Arizona, worries about the future of farming in the region. Tighter supplies mean there will be less farming and fewer dollars going to agricultural services like fertilizer suppliers.
“Eventually,” he said, “the prices are going to hit the consumer. Sooner or later, it’s got to go up. So it’s just a domino effect.”
Story tags » Natural resources

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