GCA v. State — Montana Supreme Court requires permit challengers to exhaust administrative appeal first

Case
Gateway Conservation Alliance v. State of Montana and Montana Department of Environmental Quality; TMC, Inc., Intervenor and Appellee
Court
Supreme Court of the State of Montana
Judge
Beth Baker (elected 2011)
Date Decided
October 13, 2026
Docket No.
DA 25-0808
Topics
Administrative exhaustion; Environmental permits; Constitutional challenge; Opencut mining
Source
Read the full opinion

Background

The Montana Department of Environmental Quality approved TMC, Inc.’s opencut mining permit for a proposed 20-year clay, gravel, and sand mine in Gallatin County. Gateway Conservation Alliance timely appealed the permit approval to the Montana Board of Environmental Review, asserting that the permit violated requirements of the Opencut Mining Act.

While that administrative appeal remained pending, Gateway separately sued DEQ in district court. It alleged that 2021 amendments to the Opencut Mining Act, enacted through House Bill 599, violated Montana’s constitutional right to a clean and healthful environment. Gateway sought a declaration that the amendments were unconstitutional, an injunction, and vacatur of the same permit. The district court dismissed the action for failure to exhaust administrative remedies.

The Court’s Holding

The Montana Supreme Court affirmed. Gateway’s constitutional claim was not an independent facial challenge to the administrative scheme; it was tied to DEQ’s issuance of Permit 3462 and accompanied by permit-specific issues within the Board’s jurisdiction. Gateway therefore had to complete its contested-case appeal before seeking judicial relief.

The court held that MAPA preserves Gateway’s ability to challenge the validity of the statute on judicial review after a final Board decision. The Board need not decide the constitutional question, but Gateway must first exhaust the administrative process because the Board could invalidate the permit on nonconstitutional grounds, potentially making constitutional adjudication unnecessary.

Key Takeaways

  • A constitutional claim tied to a particular agency permit does not bypass MAPA’s exhaustion requirement.
  • After a final agency decision, a party may raise a challenge to the validity of the statute underlying the agency action in judicial review.
  • Exhaustion was not futile because the Board could grant permit-related relief, including vacatur.

Why It Matters

The decision applies the Montana Supreme Court’s recent exhaustion framework to environmental permitting disputes. Permit opponents cannot split a permit challenge into parallel administrative and district-court proceedings merely by characterizing a statute-based challenge as facially constitutional.

The ruling preserves eventual judicial review of constitutional claims while requiring the agency process to develop the permit record and resolve potentially dispositive nonconstitutional issues first.

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