Plumbing problems at the dam holding back the second-largest reservoir in the U.S. are spurring concerns about future water delivery issues to Southwestern states supplied by the Colorado River.
Federal officials have discovered damage inside Glen Canyon Dam that could force limits on how much Colorado River water is released at low reservoir levels, raising risks the Southwest could face shortages that were previously unforeseen.
The damage was recently detected in four 8-foot-wide steel tubes — called the river outlet works — that allow water to pass through the dam in northern Arizona when Lake Powell reaches low levels. Dam managers spotted deterioration in the tubes after conducting an exercise last year that sent large flows from the dam into the Grand Canyon.
The boldest strategies to save the Colorado River are coming from environmental groups, including a rising chorus of voices to give Lake Mead priority over Lake Powell.
The Bureau of Reclamation is analyzing future operations of Glen Canyon Dam and Lake Powell.
The Colorado River reservoir is facing record low water levels that threaten the current system, and conservationists are proposing a work-around: a tunnel to bypass the dam.
After years living with a lingering sense of doom, residents have taken some pleasure in seeing Lake Mead fill up a little bit on the strength of a record snowpack for the Colorado River. The fact remains that it’s only a third full, but it’s a big improvement over last year. In fact, the lake is 23 feet higher today than its low point in July of 2022.
California farmers are putting a big target on Glen Canyon Dam, telling the federal government it’s time to take a serious look at suggestions to stop using the dam to produce electricity. Talk of decommissioning the dam has been on the fringe of criticism of U.S. Bureau of Reclamation management of the Colorado River, but it could gain momentum as public comment is released in the coming days.
Encouraging news continues to flow about water levels at Lake Mead. The U.S. Bureau of Reclamation has announced that increased releases from Lake Powell will continue through the end of May.
Water released through the Glen Canyon Dam at Lake Powell flows south as the Colorado River into the Grand Canyon and eventually into Lake Mead. The majority of the water in the Colorado River basin comes from melting snow in the Colorado Rockies, which had record snowfall this year.
Historic snowfall across the Rocky Mountains is helping recharge some of the country’s biggest reservoirs and provide – briefly – some much-needed breathing room for the oversubscribed Colorado River.
Forecasts say the melting snow flowing into Lake Powell via the Colorado River and its tributaries could hit 177% of average this year, a major boost at a time when lake levels had hit historic lows.
An extra pulse of water has been sent through the Grand Canyon this week. The Bureau of Reclamation is running a “high-flow experiment” at Glen Canyon Dam in northern Arizona, which means a big release of water designed to move and redeposit sand and sediment will make its way downstream from the dam. This experiment is the first since 2018, and comes in response to forecasts for an above average spring snowmelt in the Rocky Mountains.
The Bureau of Reclamation released its 24-Month Study on Thursday, April 20, which includes an increase to downstream flows from Lake Powell to Lake Mead of up to 9.5 million acre-feet (maf) this water year, which runs from (October 1, 2022 through September 30, 2023.
According to a press release from the Bureau of Reclamation, Glen Canyon Dam’s annual release volume for water year 2023 was initially set at 7.0 maf, based on the August 2022 24-Month Study, and is now projected to increase to up to 9.5 maf because of high snowpack this winter and projected runoff in the Colorado River Basin this spring.
The Water News Network is San Diego County’s source for water news and information.
