Overview
| Stage | Production |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
- Longwall
- Continuous
- Room-and-pillar
|
| Processing |
|
| Production Start | 1991 |
| Mine Life | 8 years (as of Jan 1, 2020) |
The Bull Mountains Mine No. 1 (the “Bull Mountains Mine”) is the only active underground coal mine in Montana. |
Source:
p. 27
Signal Peak Energy, LLC owns and operates the Bull Mountains Mine No.1 underground coal mine.
Contractors
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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.
Mining Methods
- Longwall
- Continuous
- Room-and-pillar
Summary:
The Mine is located in Musselshell and Yellowstone counties between the Musselshell and Yellowstone rivers, approximately 30 miles north of Billings, Montana, and 20 miles southeast of Roundup, Montana. The vast majority of coal is mined using the longwall method; the remaining development coal is mined using the room-and-pillar method.
The mine operates a longwall and one continuous mining machine development section.
Source:
Summary:
All coal is washed to improve coal quality and shipped from an onsite rail car loading facility.
Production:
| Commodity | Units | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Coal (thermal)
|
tons
| ...... | ...... | ...... | 7,566,480 | 5,883,820 |
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Operational Metrics:
| Metrics | 2020 |
|
Raw coal annual capacity
| ...... |
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Reserves at October 1, 2020:
| Category | Tonnage | Commodity |
|
Proven & Probable
|
86.8 M tons
|
Coal (thermal)
|
Heavy Mobile Equipment as of January 10, 2010:
| HME Type | Quantity |
|
Continuous Miner
|
.......................
|
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Aerial view:
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