Court Opinion

ID: 9902098
Source: CourtListenerOpinion
Date Created: 2023-11-22 22:06:22.215775+00
Date Added: 2024-06-11T09:21:45.879339
License: Public Domain

FILED
                                                                                                11/22/2023
                                                                                           Bowen Greenwood
                                                                                           CLERK OF THE SUPREME COURT
                                                               1
                                SYNOPSIS OF THE CASE                                            STATE OF MONTANA

2023 MT 224, DA 22-0064: MONTANA ENVIRONMENTAL INFORMATION
CENTER AND SIERRA CLUB, Appellees, v. WESTMORELAND ROSEBUD
MINING, LLC, MONTANA DEPARTMENT OF ENVIRONMENTAL QUALITY,
and MONTANA BOARD OF ENVIRONMENTAL REVIEW, Appellants.

In a unanimous Opinion, the Montana Supreme Court has upheld a lower court ruling that
vacated the State permit that allowed the expansion of the Rosebud coal mine in Colstrip,
Montana.
In 2015, the Montana Department of Environmental Quality (DEQ) issued a permit for
additional mining to Westmoreland Rosebud Mining. Several conservation groups
challenged the permit, arguing it was issued in violation of the legal requirements of the
Montana Strip and Underground Mine Reclamation Act.
A district court in eastern Montana agreed and vacated the permit, halting mining activities
in the expanded area. However, the Montana Supreme Court temporarily reinstated the
permit pending resolution of the legal issue. State law is based on federal requirements for
regulating strip mines.
The Supreme Court ruled that the Board of Environmental Review (the Board) made
several errors when it upheld DEQ’s finding that Westmoreland had demonstrated that the
proposed mining activity is designed to prevent material damage to the hydrological
balance in the area.
During the permitting process, Westmoreland acknowledged a projected 13% increase in
salinity in the alluvium of East Fork Armell’s Creek from the proposed mining activities.
Although the additional salts in the alluvium would not be a statistically significant
concentration, they would increase the length of time during which higher pollutant levels
would be present. The Court held that the Board did not adequately analyze whether
extending the duration of an existing water quality violation satisfied the legal
requirements. Further, the Court ruled that the Board failed to properly consider the
cumulative impacts of increased mining activity on the area water quality.
The ruling halts mining expansion into Area B of the Rosebud Mine and sends the
permitting process back to the Board for additional review.

1
 This synopsis has been prepared for the convenience of the reader. It constitutes no part of the
Opinion of the Court and may not be cited as precedent.