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Denver Water can finish and fill Gross Reservoir, US appeals court rules
Colorado Sun ^ | Sep 15, 2026 | Michael Booth

Posted on 09/27/2026 2:15:34 PM PDT by george76

10th Circuit Court lifts an injunction barring the filling of the expensive, controversial dam expansion in western Boulder County

...

Denver Water can finish its Gross Dam expansion and fill the controversial reservoir in western Boulder County, the 10th U.S. Circuit Court of Appeals ruled Tuesday, lifting an injunction by a lower court judge and confirming the dam’s permits as sound.

The appeals court said the U.S. Army Corps of Engineers had acted responsibly in issuing construction permits for the $600 million expansion, which is largely complete and will be filled using water rights Denver holds in the Colorado River basin on the western side of the Continental Divide.

While a federal district judge in Denver had issued the injunction after declaring the Corps had failed to consider less-damaging alternatives, or the fact that climate change could rob Colorado of river water, the appeals court rejected that view.

“We do not think the Corps’s choice of cost methodology was arbitrary or capricious,” the appeals court ruling said. The plaintiffs, including nonprofit Save the Colorado, argued the Corps rejected clear evidence of climate change, but the appeals court ruled the Corps gave the research fair consideration.

“The Corps considered — and rejected — the reliability of that and similar studies, one of which showed that in the Colorado River Basin, ‘no consistent trends in annual precipitation have been detected over the last 100 years,’” the appeals court said.

“In the end, the environmental groups ask us to substitute our judgment for the Corps’s. They point out scientific studies that, in their view, rebut the Corps’s reading of the scientific literature and ask us to opine on what the scientific research establishes,” the appellate ruling said. “But our job is not to second-guess the Corps’s assessment as long as it rests on a reasoned basis.”

Denver Water said it looked forward to completing a crucial water supply project it began permitting 23 years ago.

“We’re pleased to see the 10th Circuit Court of Appeals confirm that the Gross Reservoir Expansion Project was lawfully permitted by the U.S. Army Corps of Engineers and that Denver Water can proceed with the final stages of this critical project to ensure a safe, secure water supply for the 1.5 million people we serve,” according to a statement from spokesperson Todd Hartman. “With this decision, Denver Water can move forward with completion of construction, site preparation and eventual filling of the expanded reservoir. An expanded Gross Reservoir is vital to the future of the Denver region.”

...

Save the Colorado’s Gary Wockner, who has led battles against many projects threatening to further alter the ecology of Colorado river systems, said the appeals court decision doesn’t change Colorado’s water challenges.

“It’s nonsensical to be putting more straws in, and further draining, the Colorado River at this point in history,” Wockner said. “That the law allows it to happen doesn’t make it right, it just makes it legal. I saw something wrong, I stood up, spoke out and took action. It was the right thing to do and I would do it all over again.”

Wockner said Tuesday the plaintiffs would not be appealing the decision to the U.S. Supreme Court.

Gross Reservoir Dam backs up South Boulder Creek, while also taking in water through the Moffat Tunnel under the divide, from the Fraser and Williams Fork rivers in the Colorado River basin. Denver Water has said the expansion is needed to balance its water storage system currently heavily concentrated on the southern end of the metro area.


TOPICS: Business/Economy; Government; News/Current Events; Politics/Elections; US: Colorado
KEYWORDS: boulder; colorado; dam; denver; denverwater; energy; gross; grossdam; grossreservoir; reservoir; water; xcel; xcelenergy

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1 posted on 09/27/2026 2:15:34 PM PDT by george76
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To: dynachrome; MileHi; backspace; Balata; bboop; Ben Dover; Benito Cereno; BigEdLB; bluejean; ...

Colorado Ping ( Let me know if you wish to be added or removed from the list.)

earlier =

Colorado state budget deficit grows to $1.6B as Medicaid costs soar..

https://freerepublic.com/focus/f-news/4396581/posts


2 posted on 09/27/2026 2:17:26 PM PDT by george76 (Ward Churchill : Fake Indian, Fake Scholarship, and Fake Art)
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To: george76
does every single thing need to be litigated? Jeez...Okay Colorado is now a blue state, but frankly more reservoirs the better in the mountain and western states...
3 posted on 09/27/2026 2:19:40 PM PDT by abigkahuna
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To: george76

SOMEONE EXPLAIN TO ME WHAT A JUDGE KNOWS ABOUT WATER—_ESPECIALLY VS THE ARMY CORPS OF ENGINEERS.


4 posted on 09/27/2026 2:20:52 PM PDT by ridesthemiles (not giving up on TRUMP---EVER)
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To: ridesthemiles

Gross Dam’s $600 million expansion is largely done .. June 14, 2026 ..

https://www.denverpost.com/2026/06/14/gross-reservoir-denver-water-appeals-court/


5 posted on 09/27/2026 2:27:15 PM PDT by george76 (Ward Churchill : Fake Indian, Fake Scholarship, and Fake Art)
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To: abigkahuna

Coal-burning Comanche 3 power plant back in service after a year of repairs..— the largest generating asset on Xcel Energy’s Colorado grid ..

Shut down since August 2025, repairs to the plant in Pueblo could cost as much as $26 million, most covered by insurance.

https://coloradosun.com/2026/09/24/comanche-back-online-pueblo-xcel-energy-coal/


6 posted on 09/27/2026 2:29:59 PM PDT by george76 (Ward Churchill : Fake Indian, Fake Scholarship, and Fake Art)
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To: george76

“Save the Colorado’s Gary Wockner, who has led battles against many projects threatening to further alter the ecology of Colorado river systems, said the appeals court decision doesn’t change Colorado’s water challenges.

“It’s nonsensical to be putting more straws in, and further draining, the Colorado River at this point in history,” Wockner said. “That the law allows it to happen doesn’t make it right, it just makes it legal. I saw something wrong, I stood up, spoke out and took action. It was the right thing to do and I would do it all over again.”

Wow. Could it be that Mr. Wockner is starting to have a dim realization of the notion that issues such as this should be decided through political, not legal processes? That judges aren’t super legislators who can substitute their judgments for those of representative bodies?

Unlikely. He’s a zealot who lost this one but will be more than happy to keep shopping for corrupt judges who’ll impose his views on society


7 posted on 09/27/2026 2:47:45 PM PDT by j.havenfarm (25 years on Free Republic, 12/10/25! More than 12,750 replies and still not shutting up!)
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To: george76

Fill it up and fire up the coal!


8 posted on 09/27/2026 2:56:49 PM PDT by MileHi ((Liberalism is an ideology of parasites, hypocrites, grievance mongers, victims, and control freaks.)
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To: george76

The enviro-nazis should be forced to pay the legal costs of the defendants and the court.


9 posted on 09/27/2026 4:33:33 PM PDT by pierrem15 ("Massacrez-les, car le seigneur connait les siens" )
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