U.S. Supreme Court Narrows Environmental Review Scope, Advancing Oil Railway Project

May 29, 2025

Overview

The U.S. Supreme Court ruled on May 29, 2025, in Seven County Infrastructure Coalition v. Eagle County, Colorado, overturning a lower court’s decision that had blocked an 88-mile railway project in Utah’s Uinta Basin. The ruling clarifies that the National Environmental Policy Act (NEPA) does not mandate analyzing indirect effects from separate upstream or downstream activities, such as oil drilling or refining. NEPA is a 1970 law requiring federal agencies to assess environmental impacts of major projects. This decision reinstates the Surface Transportation Board’s 2021 approval of the railway, which aims to connect Utah’s oil fields to national rail networks, but it also sets a precedent that could streamline environmental reviews for infrastructure projects nationwide.

Facts

In 2020, the Seven County Infrastructure Coalition applied to the U.S. Surface Transportation Board for approval to construct an 88-mile railway in Utah’s Uinta Basin to transport crude oil to Gulf Coast refineries.
The Board conducted a 3,600-page Environmental Impact Statement (EIS) under NEPA, analyzing the railway’s construction and operation impacts, including 91 mitigation measures, but noted without detailed analysis potential effects of increased upstream oil drilling and downstream refining.
The Board approved the project in December 2021, citing transportation and economic benefits outweighing environmental impacts.
Eagle County, Colorado, and environmental groups, including the Center for Biological Diversity, challenged the approval in the D.C. Circuit Court, which vacated the EIS in 2023, citing “numerous NEPA violations” for insufficient analysis of upstream and downstream effects.
On May 29, 2025, the Supreme Court reversed the D.C. Circuit’s ruling, stating NEPA focuses on the “proposed action” (the railway) and does not require evaluating separate projects’ effects.
NEPA, enacted in 1970, requires federal agencies to prepare EISs for major projects to inform decision-making, not to mandate specific outcomes.

Perspectives

Seven County Infrastructure Coalition: Supports the ruling, arguing the Board’s extensive EIS met NEPA’s requirements. The coalition emphasizes the railway’s economic benefits, stating it will “bring safer, sustainable, more efficient transportation options” and foster investment in rural Utah.
Utah Governor Spencer Cox: Welcomes the decision, asserting it supports energy independence and rural job creation. He argues NEPA should not be paralyzed by “speculative analyses of distant, unrelated impacts.”
Eagle County, Colorado: Opposes the ruling, contending the Board failed to adequately assess risks like oil spills and increased train traffic along the Colorado River, which could harm local communities and ecosystems. The county seeks a thorough NEPA review of all foreseeable impacts.
Center for Biological Diversity: Criticizes the decision as undermining NEPA, warning it allows agencies to “ignore the harm federal projects will cause to ecosystems, wildlife, and the climate.” The group vows to continue opposing the railway.
Ute Indian Tribe of the Uintah and Ouray Reservation: Supports the railway, highlighting its potential to boost the tribe’s economy by providing market access for its waxy crude oil, currently limited by reliance on truck transport.

Considerations

The ruling limits NEPA’s scope to direct project impacts, potentially accelerating approvals for infrastructure like highways, pipelines, and renewable energy projects.
Reduced environmental scrutiny may increase risks to communities and ecosystems, particularly in regions like the Colorado River corridor, vulnerable to oil spills.
Short-term economic gains from projects like the Uinta Basin Railway may boost rural economies but could exacerbate long-term pollution concerns.
The decision aligns with recent congressional NEPA reforms (2023) capping EIS lengths, reflecting a trend toward streamlining regulatory processes.
Federal agencies may face challenges balancing public participation with expedited reviews, potentially reducing transparency in environmental decision-making.
The ruling could embolden industries to pursue projects with less rigorous oversight, shifting mitigation responsibilities to state and local governments.
Ongoing litigation and additional permits for the Uinta Basin Railway indicate the project’s completion remains uncertain despite the Supreme Court’s decision.