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Lawsuit settlement signals start of Chimney Hollow water project

The water project is set to begin, increasing Longmont's water supply
Chimney-Hollow-rendering

A settlement of a federal lawsuit between the Northern Water Municipal Subdistrict and environmental groups means construction of Chimney Hollow Reservoir will begin this summer and the Colorado River Connectivity Channel in Grand County.

In return, the Municipal Subdistrict will contribute $15 million to a foundation to pay for projects that enhance the Colorado River and its many watersheds in Grand County.

The Municipal Subdistrict Board voted 10-1 Wednesday to authorize its participation in the settlement. 

“This settlement shows there is an alternative to costly litigation that can provide benefits both to the environment in Grand County and the Colorado River, as well as acknowledging the need for water storage,” said Northern Water General Manager Brad Wind in a news release.

The compromise brings to a close a lawsuit in federal court filed by Save the Colorado, Save the Poudre, WildEarth Guardians, Living Rivers, Waterkeeper Alliance and the Sierra Club in October 2017, the news release states. The suit challenged the permit issued by the Bureau of Reclamation and Army Corps of Engineers for the construction of the Chimney Hollow Reservoir.

On Dec. 19, 2020, the federal court ruled against the environmental organizations. The ruling was then appealed in February, and as part of the appeals process, both sides were required to engage in court-ordered mediation, which resulted in the settlement, the news release states.

Chimney Hollow Reservoir, the key component to the Windy Gap Firming Project, will bring a reliable water supply to the 12 municipalities water providers and utilities paying for its construction as well as provide a much-needed recreation area to be managed by the Larimer County Department of Natural Resources, the news release states.

Chimney Hollow Reservoir will be located in a dry valley just west of Carter Lake in southwest Larimer County and will store 90.000 acre-feet of water from the Windy Gap Project for use by 12 participants, including Broomfield, Platte River Power Authority, Longmont, Loveland, Greeley, Erie, Little Thompson Water District, Superior, Louisville, Fort Lupton, Lafayette, and the Central Weld County Water District.  Chimney Hollow Reservoir will make the Windy Gap water supply serving those participants more reliable and meet a portion of their long-term water supply needs, the news release states.

Each participant will also enact a water conservation plan to comply with state law and permit requirements.

The compromise will also move forward other environmental measures related to the Project, including the Colorado Connectivity Channel, a newly proposed channel around the existing Windy Gap Reservoir to reconnect the Colorado River above and below the reservoir. The channel will restore the ability of fish, macroinvertebrates, nutrients and sediment in the river to bypass the reservoir. Many other environmental protections are included, such as improving streamflow and aquatic habitat in the Colorado River, addressing water quality issues, providing West Slope water supplies and more, the news release states.

The Northern Water Municipal Subdistrict negotiated with Colorado River stakeholders to develop this package of environmental protections and received a permit from Grand County and approvals from others, including Trout Unlimited and the State of Colorado, to move forward with the project.

Water storage such as Chimney Hollow Reservoir was specifically identified in the Colorado Water Plan as a necessary component for Colorado’s long-term water future needs, the news release states.

More information about the project is available at www.chimneyhollow.org, and people can also follow the project on Facebook and Twitter.