Center for Biological Diversity

For Immediate Release, November 16, 2023


Holly Snow Canada, Conserve Southwest Utah, (435) 200-5838,
Isabel Adler, Conserve Southwest Utah, (435) 256-4168,
Todd Tucci, Advocates for the West, (208) 724-2142,
Ileene Anderson, Center for Biological Diversity, (323) 490-0223,

Court Orders Do-Over for Proposed Highway Right-of-Way Through National Conservation Area in Utah

ST. GEORGE, Utah— A U.S. District Court today partially granted conservation groups’ request to remand federal agencies’ 2021 approval of the Northern Corridor Highway right-of-way through Utah’s Red Cliffs National Conservation Area, which is home to threatened desert tortoises.

Also this week, the Bureau of Land Management and U.S. Fish and Wildlife Service announced they are reconsidering their 2021 decision to approve the right-of-way for a four-lane Northern Corridor Highway through Red Cliffs National Conservation Area in southwestern Utah near Zion National Park. Red Cliffs National Conservation Area is home to imperiled species like the threatened Mojave desert tortoise, which is on an extinction trajectory.

“Today’s announcement highlights the seriousness of the deficiencies and errors in the original analysis and gives us hope that further study will lead the agencies to conclude that highways don’t belong in national conservation areas and critical habitat for vulnerable wildlife,” said Isabel Adler, Red Cliffs campaign director at Conserve Southwest Utah, the lead plaintiff in the lawsuit.

Since 2006 local residents and concerned citizens across the country have voiced their opposition to the highway that would bulldoze through critical habitat for the Mojave desert tortoise and transform the southern portion of the National Conservation Area renowned for its scenic views, recreation and tranquility. In January 2021, in the final days of the Trump administration, the federal government approved the highway right-of-way despite viable transportation alternatives that meet community needs without harming protected public lands.

In June 2021 Utah-based and national conservation organizations filed a lawsuit against the U.S. Department of the Interior, the Bureau of Land Management and the U.S. Fish and Wildlife Service, challenging the agencies’ 2021 decision to approve the highway right-of-way. The lawsuit cited violations of the Omnibus Public Lands Management Act, the Land and Water Conservation Fund Act, the National Environmental Policy Act, the Endangered Species Act and the National Historic Preservation Act. In October the organizations and the federal agencies signed an agreement in the case.

“As predicted, the Trump administration’s environmental review and approval of the Northern Corridor Highway collapsed under scrutiny,” said Todd Tucci, plaintiffs’ attorney with Advocates for the West. “Ultimately, the Department of the Interior was forced to abandon President Trump and Secretary Bernhardt’s conclusion that a four-lane high-speed highway through a National Conservation Area and Mojave desert tortoise habitat would conserve, protect and enhance desert tortoise and the conservation resources in the area. It wasn’t a huge lift, frankly, and it was made even easier because the Department of the Interior had previously determined on six different occasions that this highway would be ‘biologically devastating’ to the tortoise.”

As part of the litigation, the BLM and the Service acknowledged substantial and legitimate concerns with the original 2020 environmental impact statement. A supplemental environmental analysis is being prepared to further examine the effects of granting a right-of-way and to reconsider the highway right-of-way application.

“We’ll be weighing in again with the Bureau of Land Management as it reconsiders this ill-conceived highway through the stunning Red Cliffs National Conservation Area,” said Ileene Anderson, a senior scientist at the Center for Biological Diversity. “The conservation area is home to amazing desert tortoises, distinctive local plants and other wildlife. It’s also a natural refuge for people in this growing urban area. We’re committed to keeping it whole and wild.”

“We are thrilled that the federal government is re-examining this erroneous decision,” said Holly Snow Canada, executive director for Conserve Southwest Utah. “Rest assured that Conserve Southwest Utah and its partners will continue to fight for Red Cliffs NCA, because when we protect landscapes and species habitats, we’re also protecting scenic vistas, recreation opportunities, peace and quiet, and physical and mental health for ourselves and for future generations, too.”

This week’s announcement from the BLM and Fish and Wildlife Service kicks off a scoping period for a supplemental environmental analysis to solicit public comments and identify issues with the proposal. The public is invited to a meeting from 4:30 p.m. to 7:30 p.m., Dec. 6, 2023, at the Dixie Center, 1835 S. Convention Center Dr., St. George, Utah, 84790.

“We are very grateful to the tens of thousands of people in Utah and across the United States who stood up for Red Cliffs National Conservation Area and opposed this unlawful, unnecessary and unwise highway in 2020,” said Snow Canada. “Your voice is needed once again to protect this precious place.”

Located at the convergence of the Mojave Desert, Colorado Plateau and Great Basin ecoregions, the Red Cliffs National Conservation Area was established in 2009 to protect its remarkable wildlife scenery, recreation, ecology, geology and cultural value. The region is home to important populations of the threatened Mojave desert tortoise and other at-risk plants and animals, including Gila monsters, burrowing owls and kit fox. The Mojave desert tortoise is on a path to extinction according to leading researchers and its habitat in Southwest Utah is especially vulnerable given recent and anticipated growth in the region.

Additional statements from plaintiffs in the lawsuit:

Danielle Murray, vice president of conservation policy at Conservation Lands Foundation:

“By starting this process the BLM has an opportunity to rightfully uphold the congressionally mandated protections for Red Cliffs National Conservation Area, which does not include construction of a four-lane highway. Paving over this desert paradise would put each and every National Conservation Land throughout the country at risk of unlawful development and other damaging activities.”

Vera Smith, senior federal lands policy analyst at Defenders of Wildlife:

“A highway has no place in a National Conservation Area and especially one that is crucial to the survival of the desert tortoise. We are pleased that the agencies are reconsidering this highway and we remain committed to fighting for the desert tortoise and the public lands that are their home.”

Kya Marienfeld, wildlands attorney at the Southern Utah Wilderness Alliance:

“Authorizing a major freeway through a congressionally designated conservation area should never have happened in the first place. Although it took some time, we’re pleased the agencies recognize this gem of public lands and are reconsidering this terrible, precedent-setting highway for the benefit of all conservation-focused lands.”

Jose Witt, Mojave Desert landscape director at The Wilderness Society:

“The decision to approve a right-of-way for a major highway through the Red Cliffs National Conservation Area was rushed, ill-informed and patently illegal. It also was unwise, as building the highway would destroy the natural, cultural and recreational values that make the Red Cliffs an irreplaceable natural asset for the St. George community, for the nation and for future generations. The government’s decision to reconsider the highway recognizes the serious legal deficiencies in the earlier approval and gives the public a new opportunity to ensure the public lands in the Red Cliffs National Conservation Area will be protected into the future.”

Chris Krupp, public lands attorney at WildEarth Guardians:

“Desert tortoise populations have declined significantly since the species was listed as threatened in 1990. It would be a calamity to permit a four-lane highway through the Red Cliffs, a stronghold for the species. Local officials need to come up with better solutions to address St. George’s growth than a new highway that would just create additional sprawl, kill desert tortoise, and mar a beloved landscape.”

Background on Red Cliffs National Conservation Area

The 44,724-acre Red Cliffs National Conservation Area is part of the larger Red Cliffs Desert Reserve that is collaboratively managed by the Bureau of Land Management, the Fish and Wildlife Service, the state of Utah, Washington County and other municipalities.

The reserve was established under the 1995 Habitat Conservation Plan as part of a compromise to protect about 61,000 acres of public lands for the Mojave desert tortoise, which is listed as threatened under the Endangered Species Act, while opening 300,000 acres of state and private lands for development.

The Red Cliffs National Conservation Area was established in 2009 by Congress to “conserve, protect, and enhance… ecological, scenic, wildlife, recreational, cultural, historical, natural, educational, and scientific resources” of the public lands within the unit.

These spectacular public lands are 45 miles from Zion National Park and include 130 miles of trails, two wilderness areas, heritage public use sites, Native American cultural artifacts, several threatened and endangered species, and Utah’s most popular state park, Snow Canyon State Park. People from all over the state, country and world visit to hike, mountain bike, rock climb, horseback ride, photograph and marvel at the expansive red rock landscape.

The Center for Biological Diversity is a national, nonprofit conservation organization with more than 1.7 million members and online activists dedicated to the protection of endangered species and wild places.

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