Moffat Collection System Project update: Environmental groups file lawsuit

The dam that forms Gross Reservoir. Photo: Brent Gardner-Smith/Aspen Journalism

From Colorado Public Radio (Grace Hood):

A suit filed against three U.S. government agencies seeks to stop the expansion of Denver Water’s Gross Reservoir in Boulder County…

Gross Reservoir provides water to 1.4 million Front Range customers. The expansion would divert more water from Colorado River headwater tributaries during wet years. In a nutshell, the project seeks to raise the height of the existing dam by 131 feet; storage capacity would increase by 77,000 acre feet.

The environmental groups who sued say the U.S. government permitting process inadequately evaluated the impact of the large project on streamflows. There are also concerns about how construction would affect wildlife.

“We went above and beyond mitigation of environmental impacts under the permits,” Denver Water CEO Jim Lochhead said. “We sat down with Grand County, Eagle County… and a host of agencies across Western Colorado, and developed a series of environmental enhancements to the streams of Western Colorado.”

Trout Unlimited is one such group that has supported the Gross Reservoir expansion, citing successful stream augmentation programs along the Fraser River…

Revving up the legal gears could pose a setback for Denver Water, which has spent years securing the necessary permits. Now that it has those in place, environmental groups are seeking to stop construction.

Denver Water’s collection system via the USACE EIS

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