Citing conservation gains and a third straw to the bottom of Lake Mead, the Southern Nevada Water Authority on Thursday voted to shelve a proposal for a multi-billion pipeline that would have moved water from Northern and Eastern Nevada to Las Vegas.
Sprawled across a desert expanse along the Utah-Arizona border, Lake Powell’s nearly 100-foot high bathtub ring etched on its sandstone walls belie the challenges of a major Colorado River reservoir at less than half-full. How those challenges play out as demand grows for the river’s water amid a changing climate is fueling simmering questions about Powell’s future.
As of Monday, the National Oceanic and Atmospheric Administration’s forecast for this year’s expected water supplies in the Colorado River is at 59% of average. That’s not good news.
If that prediction proves true, this will be one of the driest water years since Lake Powell was constructed nearly 60 years ago. The volume of water stored in Lake Powell each year is affected by three primary factors: the amount of water flowing into the reservoir after ‘Upper Basin‘ water users have extracted water for their use, minus water released from the reservoir to support Lower Basin water users, and minus evaporation from the reservoir itself. Lake Powell will lose – by my estimation — about 22 feet of water this year, or about 2.1 million acre-feet of storage.
At that point, the reservoir will be 60% empty.
Come spring, the American West’s vast water reservoirs are supposed to fill with melting snow. However this year, as in recent years, the large reservoirs of Lake Mead and Lake Powell in the Colorado River basin have seen declining water levels — an ominous trend that a new study warns could signal a looming megadrought.
A dry April caused the expected spring-summer runoff into Lake Powell to plunge dramatically, with the water-flow forecast down the Colorado River declining as much in one month as Tucson Water customers use in 10 years.
A longtime water conservation advocate says Arizona and the other Lower Colorado River Basin states need to cut their water use more and faster.
Sustainable Waters president Brian Richter says Arizona, California, and Nevada need to slash total water use by 18% from their 2000-2018 average to bring Lakes Mead and Powell into a long-term state of balance, the Arizona Daily Star reports. He says the decrease would push the river’s falling reservoirs into sustainability.
Water managers from throughout the Colorado River Basin took the stage at the Colorado River Water Users Association conference earlier this month to talk about conserving water in the face of the twin threats to the river: increasing demand and climate change.
Federal water managers are starting to review a crucial 2007 agreement for seven Western states to share drought-diminished water supplies from the Colorado River ahead of talks about revising and renewing it beginning in 2026, U.S. Interior Secretary David Bernhardt said Friday.
Bernhardt called for a report next December, ahead of a deadline set in the older deal, which established a schedule of strict water cutbacks to states if levels keep falling at the key Lake Mead and Lake Powell reservoirs.
We haven’t published many ten-part editorials in the Daily Post over the past 15 years. But we also don’t come across many political issues — local, state, or national — as complicated or as perplexing as the declining lake levels in the two largest reservoirs situated on the Colorado River: Lake Mead and Lake Powell.
An invasive mussel that has taken up residence in Lake Powell on the Colorado River is threatening Utah’s push to develop a $1.8 billion pipeline to deliver water to fast-growing areas. The Army Corps of Engineers has asked the state to provide a plan on how it will prevent the pipeline from transporting quagga mussels from the lake on the Arizona-Utah border, The Salt Lake Tribune reported Friday. The 140-mile (225-kilometer) pipeline aims to transport water to Washington and Kane counties in southern Utah. The line is planned to end at Sand Hollow Reservoir near St. George.
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