--- title: "US officials reject cool water release from Lake Powell to protect hydropower" publication: "MediaBias News" url: "https://mediabias.news/climate/us-officials-reject-cool-water-release-from-lake-powell-to-protect-hydropower" api: "https://mediabias.news/api/v1/stories/us-officials-reject-cool-water-release-from-lake-powell-to-protect-hydropower" markdown: "https://mediabias.news/climate/us-officials-reject-cool-water-release-from-lake-powell-to-protect-hydropower.md" audio: "https://mediabias.news/api/audio/us-officials-reject-cool-water-release-from-lake-powell-to-protect-hydropower" category: "Climate" area: "United States" published: "2026-08-07T12:45:59.165Z" source_reported: "2026-08-07T07:40:00.000Z" updated: "2026-08-07T12:45:59.165Z" trust_score: 96 critic_score: 95 hype_score: 12 assessment_type: "coverage-and-source-reporting-analysis" fact_check_status: "not-performed" coverage_measured: "2026-08-07T17:15:09.885205+00:00" --- # US officials reject cool water release from Lake Powell to protect hydropower *Federal Bureau of Reclamation cites strain on electricity generation as reason for decision affecting threatened fish* **Scores for the source reporting** (0-100, assessing the original journalism this article was written from, not this write-up): - Trust 96 of 100, higher is better. Trust high (96) because the report names officials, cites an email from the Bureau, and provides specific figures with sources. - Craft 95 of 100, higher is better. Critic score (95) reflects clear context, quoted officials, specific data, and explanation of future actions. - Hype 12 of 100, lower is better. Hype low (12) as headline matches content and language remains factual without sensationalism. Scored by MediaBias News; method at https://mediabias.news/methodology. **The short version** - The Bureau of Reclamation will not release cool water from Lake Powell in 2026, citing hydropower generation concerns. - Lake Powell is 23% full, and the Colorado River downstream of Glen Canyon Dam is about 69°F (20.5°C). - The decision affects the humpback chub, a threatened fish species, and follows record-low snowpack in the Colorado River Basin. - Utilities warned that cool water releases could increase electricity costs for millions of customers. Federal officials announced on 6 August 2026 that they will not release cool water this year from Lake Powell, a major reservoir on the Colorado River. The decision, communicated in an email by the Bureau of Reclamation, prioritises hydropower generation over measures to protect the humpback chub, a threatened fish species downstream of Glen Canyon Dam in northern Arizona. The Bureau of Reclamation said the decision was made "due to significant hydropower generation concerns under already strained system conditions." Lake Powell is currently about 23% full, and the river downstream of the dam is approximately 69°F (20.5°C). The Bureau considers recommending cool water releases when downstream temperatures exceed 60°F (15.5°C) for three consecutive days, a threshold that has been regularly surpassed for over a month. Cool water releases, known as "cool mix flows," involve releasing water from deeper, colder layers of the reservoir. These releases have been used in previous years to lower river temperatures and prevent the spawning of smallmouth bass, an invasive species that threatens the humpback chub. However, the deep water layers lack hydropower turbines, meaning such releases would reduce electricity generation. The decision follows the worst snowpack on record for the Colorado River Basin, which supplies water to over 40 million people across seven US states, tribal nations, and Mexico. It also comes a week after federal officials proposed water cuts for California, Nevada, and Arizona to address the river's dwindling resources. ## What the coverage left out None of the digests from the left-rated outlets mentioned the specific temperature threshold the Bureau of Reclamation uses to consider cool water releases. The centre-rated KMGH report and the Associated Press report both included this detail. The right-rated digest did not mention the humpback chub by name or the species' threatened status. ## Who covered it Shares of the 15 covering outlets with a published leaning rating: - Left: 47% (7) - Centre: 46% (7) - Right: 7% (1) 1 of 16 covering outlets carried no usable leaning rating and were excluded from those percentages. Coverage measured 2026-08-07T17:15:09.885205+00:00. **Coverage watch:** developing. Checked 20 times; 0 checks found a material change. Most recently checked 2026-08-07T17:45:39.002Z. ## How the sides framed it ### Left - The seven left-rated digests and the Associated Press report led on the decision's impact on the humpback chub, a threatened species. The Associated Press report, the only full article from this side, quoted Matt Rice of American Rivers, who called the decision "disappointing" and warned it could be a "death sentence" for the fish. The report also noted the life-threatening temperatures for the nearby rainbow trout fishery. - The Associated Press report described the decision as pitting "conservation of the humpback chub against ratepayer costs for electricity." It included the Bureau of Reclamation's statement that cool water releases in 2024 and 2025 had successfully prevented smallmouth bass spawning. The report also carried the utilities' warning that alternative energy purchases could increase electricity bills for customers. ### Centre - The seven centre-rated digests and the KMGH report led on the hydropower concerns cited by the Bureau of Reclamation. The KMGH report, the only full article from this side, quoted Andy Colosimo of the Colorado River Energy Distributors Association, who called the decision "the right call" given the river's conditions. The report described the strain on hydropower production and the potential costs to utilities and ratepayers if cool water releases had proceeded. - The KMGH report included the Bureau of Reclamation's email statement in full and noted the record-low snowpack and the federal proposal for water cuts. It also explained the mechanics of cool mix flows and the risk posed by smallmouth bass to the humpback chub. The report quoted Wayne G. Pullan of the Bureau, who outlined alternative measures to address the smallmouth bass invasion. ### Right - The single right-rated digest, from the Madison Courier, led on the decision not to release cool water and the strain on hydropower production. It noted that supporters of cool water releases had argued for their effectiveness but did not include any quotes or additional context beyond the basic facts of the decision. **Provisional coverage gap:** right. The watch is not closed, so this is not yet a settled blindspot finding. ## Factuality profile of the covering outlets These are published factuality ratings of the outlets, not a verdict on whether this story or its claims are true. - high: 8 - unknown: 1 - veryHigh: 7 ## Verification scope This page compares coverage and scores the source reporting. It is not a ClaimReview verdict on whether the underlying event or claim is true. ## Original reporting this was written from - [ecotopical.com](https://ecotopical.com/physorg/457352/officials-not-release-cool-water-colorado-river-reservoir) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [The Independent](https://independent.co.uk/news/world/americas/colorado-river-glen-canyon-hydropower-chub-powell-b3029051.html) — Feds sacrifice rare fish in Colorado River to save power for millions - [KMGH](https://denver7.com/news/environment/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [The Toronto Star](https://thestar.com/news/world/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_f10c4315-4e09-5ed0-a5f7-cdd983ecb30d.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Washington Top News](https://wtop.com/animals-pets/2026/08/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Newsday](https://newsday.com/news/nation/colorado-river-humpback-chub-cool-water-mix-s28232) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Mid Florida Newspapers](https://midfloridanewspapers.com/ap/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_e0763fc0-41d5-5345-b30e-4366841c36e5.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Ottumwa Courier](https://ottumwacourier.com/news/national_news/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_53c1f21e-292a-53b7-a313-621b5d82a083.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Oskaloosa Herald](https://oskaloosa.com/news/national_news/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_0711dbc5-68d4-525d-a67b-18a45bfbe70c.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Madison Courier](https://madisoncourier.com/ap/news/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_f47732ac-3e76-5c11-b89d-62274e91dbf1.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Cherokee Tribune Ledger News](https://tribuneledgernews.com/local_news/state_and_national/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_961c1376-de31-59a5-b6f2-ab2f6e71964f.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Associated Press News](https://apnews.com/article/colorado-river-humpback-chub-cool-water-mix-e7744293ecbba8287c50353dadd9f029) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [The Hamilton Spectator](https://thespec.com/life/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_55128537-608f-5fb6-b5da-8aca9bd11e7d.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [The Record](https://therecord.com/life/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_8497befb-8704-5dc6-ab3e-ae48ef0f14d8.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [St Catharines Standard](https://stcatharinesstandard.ca/life/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish/article_0f1987e0-1a13-53fe-b701-2b71c0fd9790.html) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish - [Winnipeg Free Press](https://winnipegfreepress.com/arts-and-life/life/greenpage/2026/08/06/officials-will-not-release-cool-water-from-a-colorado-river-reservoir-to-protect-threatened-fish) — Officials will not release cool water from a Colorado River reservoir to protect threatened fish ## Questions **Why did officials decide not to release cool water from Lake Powell?** The Bureau of Reclamation cited significant hydropower generation concerns under already strained system conditions. Releasing cool water from deeper layers of the reservoir would reduce electricity generation, as those layers lack hydropower turbines. **How does the decision affect the humpback chub?** The decision means the Colorado River downstream of Glen Canyon Dam will remain warmer, increasing the risk of smallmouth bass spawning. Smallmouth bass are an invasive species that threaten the humpback chub, a federally protected fish. Cool water releases in previous years had prevented their spawning. **What temperature threshold does the Bureau use for cool water releases?** The Bureau of Reclamation considers recommending cool water releases when the average daily temperature downstream of Glen Canyon Dam exceeds about 60°F (15.5°C) for three consecutive days. The river has exceeded this threshold for over a month. **Which outlets focused on the impact on hydropower?** The centre-rated outlets, including KMGH, led on the hydropower concerns cited by the Bureau of Reclamation. The KMGH report quoted utilities warning that cool water releases could increase electricity costs for millions of customers. --- MediaBias News — https://mediabias.news. Reproduced from https://mediabias.news/climate/us-officials-reject-cool-water-release-from-lake-powell-to-protect-hydropower. Please cite as: MediaBias News, "US officials reject cool water release from Lake Powell to protect hydropower", https://mediabias.news/climate/us-officials-reject-cool-water-release-from-lake-powell-to-protect-hydropower