When the Bureau of Reclamation announced it would chopped releases into Lake Mead successful an effort to prop up Lake Powell, the messaging was clear, and it acknowledged a occupation immoderate successful the Western h2o satellite person raised for years.
“If Glen Canyon Dam declines beneath 3,490 feet, h2o releases would beryllium lone done the stream outlet works, which could origin operational issues, uncertainty for users, downstream impacts, instability successful determination powerfulness and h2o supplies, and a simplification successful powerfulness generation,” a quality merchandise said.
To many, the functionality of Glen Canyon Dam’s stream outlet works has been a slow-moving crisis. If levels astatine Lake Powell autumn excessively low, h2o deliveries to Lake Mead could beryllium chopped disconnected owed to imaginable harm of those merchandise tubes, spelling occupation for Southern Nevada and its neighbour states successful the Lower Colorado River Basin.
“The full travel of the Colorado River and each of the deliveries to the Lower Basin could each hinge connected these alloy tubes that were ne'er meant to convey the full travel of the Colorado River,” said Eric Balken, enforcement manager of the nonprofit Glen Canyon Institute. “That’s truthful overmuch uncertainty that precise fewer stakeholders are comfy with.”
The Southern Nevada Water Authority said arsenic overmuch successful a March missive introducing its stopgap proposal to stabilize the stream system. The missive said that the Bureau of Reclamation’s “shortsighted” determination astatine Lake Mead’s disbursal was an effort to “protect Glen Canyon Dam’s stream outlet works by reducing releases from Lake Powell.”
Deciding to trim downstream releases to debar debased elevations upstream is 1 of the reasons wherefore Lake Mead could beryllium headed for its lowest levels ever. The latest 24-month national projection shows the reservoir’s h2o level plunging successful 2028 some 29 feet below its lowest level ever recorded.
At a legislature committee proceeding this month, Andrea Travnicek adjunct Interior caput of h2o and science, called concerns astir the stream outlet works portion of “false narratives.” A 2024 interior memo from the national authorities had antecedently formed uncertainty connected the semipermanent show of Glen Canyon Dam astatine debased reservoir levels.
“You tin usage immoderate of those stream outlet works,” Travnicek said. “They person been tested; they volition beryllium capable to beryllium used. However, arsenic we’re trying to marque definite we’re managing h2o responsibly successful this basin, I don’t cognize wherefore we privation to proceed to gully (Lake Powell) down erstwhile we person different opportunities.”
What has changed?
When asked to grow connected Travnicek’s comments, Bureau of Reclamation spokesperson Peter Soeth said the bureau believes the stream outlet works tin beryllium utilized continuously, but lone with “more predominant inspections and maintenance.”
“The stream outlet works are a captious instrumentality — but they are not the preferred sole merchandise pathway,” Soeth said. “They are not intended to regenerate the penstocks arsenic the main merchandise mechanism, and maintaining Lake Powell supra 3,500 feet remains captious for long‑term strategy performance, hydropower and infrastructure health.”
That doesn’t mean re-engineering the dam isn’t a precedence oregon a possibility. By the extremity of 2026 oregon successful aboriginal 2027, Soeth said the bureau plans to merchandise an appraisal survey for 3 dam modification alternatives.
Any large undertaking beyond appraisal lacks dedicated funding, however, Soeth confirmed.
In a Friday statement, the Southern Nevada Water Authority said the uncertainty of Glen Canyon Dam’s infrastructure is different crushed for each authorities to instrumentality swift enactment to chopped h2o usage successful bid to support reservoir storage.
“While Reclamation has acknowledged the engineering feasibility exists to run astatine these levels, the bypass tubes were not envisioned to beryllium the sole merchandise mechanism,” the connection said. “Gambling connected however overmuch we tin safely merchandise portion the reservoir is adjacent bare seems little than prudent.”
Balken, of the Glen Canyon Institute, said that questions stay astir what helium sees arsenic “mixed messages” from national officials. Hydropower procreation unsocial isn’t a bully capable crushed to prop up Lake Powell, Balken said, particularly considering that galore utilities person phased the tiny magnitude they usage from the dam retired of their portfolios.
At a caller league astatine the University of Colorado, Boulder, Balken said a presumption laid retired the functionality issues of the dam and suggested they could work, portion an authoritative said successful his code aboriginal that engineers are not comfy relying connected the tubes.
“They’re trying to task assurance successful this successful the stream outlet works: They’re saying ‘We tin usage these; it’s fine. Don’t interest astir it. Nothing to spot here.’ At the aforesaid time, they’re saying, ‘Oh, that wasn’t designed for this.’”
While Balken’s enactment advocates for the eventual decommission of Glen Canyon Dam and Lake Powell for the bully of the ecosystem, helium said helium recognizes wherefore the Trump medication is pointing to the basin’s terrible proviso and request issues alternatively than faulting the stream outlet works.
“If I were successful their shoes, I’d astir apt beryllium saying the aforesaid thing,” helium said. “But I would besides beryllium proactively seeking re-engineering options.”
Contact Alan Halaly astatine ahalaly@reviewjournal.com. Follow @AlanHalaly connected X.
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