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Bull Mountains Mine

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Bull Mountains Mine

Location: 21 km S from Roundup, Montana, United States

Address:

100 Portal Drive
Roundup
Montana, United States
59072

Contacts:

Additional Resources for Suppliers & Investors

Categories

Summary

Mine TypeUnderground
StatusActive
Commodities
  • Coal (thermal)
Mining Method
  • Longwall
  • Room-and-pillar
  • Continuous
Production Start... Lock
Mine Life... Lock
SnapshotThe Bull Mountains is the only active underground coal mine in Montana and the surface of the current permit area is a mix of private, state, and federally owned land.

The LOM plan, approved by Department of Environmental Quality (DEQ) as Amendment No. 3 (AM3) on July 12, 2016, was estimated to extend mine production for 11.5 years, and included areas that would be mined under federal coal leases. The AM3 mine plan authorization issued by the Office of Surface Mining Reclamation and Enforcement (OSMRE) in 2018 was vacated by the U.S. District Court for the District of Montana on February 10, 2023. This required Signal Peak Energy, LLC (SPE) to immediately stop mining any remaining federal coal authorized under the vacated mining plan while they update the EIS.

As an interim measure to provide continued mining capacity at the site, the proposed plan for AM6 area. This mine expansion area is completely within private land. On August 1, 2024, Montana’s DEQ approved of plan for AM6.

Owners

SourceSource
CompanyInterestOwnership
Signal Peak Energy LLC (operator) 100 % Direct
Signal Peak Energy, LLC owns and operates the Bull Mountains Mine No.1 underground coal mine.
SourceSource

Deposit type

  • Sedimentary

Summary:

The overburden and the underburden of the Bull Mountains Mine consist of layers of rock including clinker, sandstone, silty sandstone, coal, siltstone, and claystone. Typically, these layers are thin and alternate between the various lithologies. The seam being mined is the Mammoth coal seam, and the coal is sub-bituminous.

Reserves

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Mining Methods

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Heavy Mobile Equipment

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Commodity Production

CommodityUnits20242023202220212020201920182017
Coal (thermal) tons  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe7,019,1297,566,4805,883,820
All production numbers are expressed as clean coal.

Operational metrics

Metrics2020
Raw coal annual capacity  ....  Subscribe

Production Costs

Commodity production costs have not been reported.

Personnel

Mine Management

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 29, 2025
....................... Subscription required ....................... Subscription required Subscription required Apr 29, 2025
....................... Subscription required ....................... Subscription required Subscription required Apr 29, 2025
....................... Subscription required ....................... Subscription required ........... Subscription required Subscription required Apr 29, 2025

Workforce

EmployeesYear
...... Subscription required 2024
...... Subscription required 2023
...... Subscription required 2022
...... Subscription required 2021
...... Subscription required 2020
...... Subscription required 2019
...... Subscription required 2018
...... Subscription required 2017

Aerial view:

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