Environmental groups sue to block Colorado River reservoir expansion

A lawsuit challenges the U.S. Army Corps of Engineers and Colorado's largest water utility over plans to expand a reservoir on the dwindling Colorado River, with environmentalists arguing climate change warrants stopping the project.

First covered Aug 15, 2026 · 2:00 AM PT · 1 article

Environmental groups sue to block Colorado River reservoir expansion — Image via insideclimatenews.org

Coverage

4h Inside Climate News Can a Dam Expansion Hold Back Climate Considerations on the Colorado River? — SANTA FE, N.M.—Is climate change enough justification to stop the expansion of a reservoir that will take more water from the dwindling Colorado River?

Primary sources

usbr.gov Crcompct (usbr.gov)

More coverage from around the web

coyotegulch.blog Gross Reservoir Expansion Project – Coyote Gulch

coyotegulch.blog Gross Dam’s $600 million expansion is largely done. Will Denver Water ever get to fill its expanded reservoir? Facing environmental challenge, state’s largest water utility is still under order not to use extra capacity — The #Denver Post

coloradosun.com Gross Reservoir dispute headed to U.S. appeals court

ktslaw.com Colorado River Developments and Potential Compact Litigation

coloradopolitics.com 10th Circuit weighs Gross Reservoir expansion, judge’s ‘punishment’ of Denver Water - Colorado Politics

Appeared in: 2026-08-15 (#7)

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