At the Line Creek operations, sixteen coal zones (E, D, C, B, A, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10B and 10A, from top to bottom) with a net aggregate thickness of 67.4 metres in 91.7 metres of gross aggregate coal section, occur in the Jurassic-Cretaceous Mist Mountain Formation (440 to 500 metres thick) (Kootenay Group) interbedded with sandstone, shale and siltstone.

The main seams are the 10B seam (average thickness 4.5 metres - thins north); 9 seam (two seams, average thickness 5.4 metres in a 6.4 metre zone - thins north and west); 8 seam (thickest seam - averages 11.6 metres in a 12.8 metre thick coal zone); 7 seam (averages 5.2 to 6.3 metres); 6 seam (two seams average 5.0 metres and 12.0 metres respectively - thickens southwest); 4 seam, which in the south is two seams, 5.0 and 12.5 metres respectively, and in the north is a single thick seam but with a shale split in the northeast, 11.6 and 12.0 metres respectively; 3 lower seam (single or multiple thin seams - 3.3 to 3.8 metres, disappears to the northwest); 3-Upper seam (4.0 to 6.0 metres average thickness, lower 50 to 75 per cent is a single coal seam with thin variable shale splits, upper portion consists of multiple thin coal seams with shale partings); and A seam (2 seams in the south, single thick seam in the north, average thickness is 3.0 to 4.0 metres). The remaining seams are commonly multiple, thinner (less than 3.0 metres) and tend to contain shale partings.

Ash contents range from 5 to 16 per cent (generally 7 to 8 per cent), volatile matter from 19.5 to 30.0 per cent and sulphur from 0.3 to 0.9 per cent (air dried basis). The coal is medium volatile bituminous in rank.

The main structural feature in the area is the north-northwest trending Fording or Alexander Creek syncline which plunges 10 degrees north with a nearly vertical axial plane. The limbs of the fold are symmetrical, with dips on the west limb ranging from 5 to 10 degrees near the axis, to vertical and overturned in some outcrops. Dips on the east limb are 5 degrees near the axis, and up to 60 degrees west near the east limb. The east limb is complicated by faults and drag folding associated with the Fording thrust zone, while imbricate, shallow east dipping thrust faults occur on the west limb.

The Line Creek operation began production in 1982 and produced 99.5 million tonnes of coal between 1982 and the end of 2019. At current production of about 4 million tonnes a year the Line Creek operation is expected to continue for another 23 years.

The Line Creek operation uses a conveyor belt system to move coal 10 kilometres from the raw coal stockpile to the plant.

Reserves as of December 31, 2019 are 3.2 million tonnes proven, plus 41.9 million tonnes probable, clean coal product. Resources as of the same date are 305.1 million tonnes measured plus 405.3 million tonnes indicated. (Teck Annual Information Form 2020 https://www.teck.com/media/2020-AIF.pdf).

As of 2019, Teck produces hard coking coal and a small percentage of thermal coal from the Burnt Ridge Extension, Mount Michael, and Mine Services Extension pits. Further exploration and coal quality testing were done in 2019 to prepare for the next phases of mining. Exploration drilling (59 RC holes, 12,239 metres; 9 LDC holes, 744 metres) occurred in producing pits and on their Burnt Ridge North extension area to update geological models and for coal quality test work.