154

Tasue I1]—Concluded
Classification of Coals by Rank—Concluded

Limits of fixed carbon Requisite
Class Group or B.t.u. mineral- physical
matter-free basis properties
Lignitic Lignite Moist B.t.u. less than|/Consolidated
8,300. :
Brown coal Moist B.t.u. less than|Unconsolidated
00.

The fixed carbon and heat value on the above basis may be calculated by using the
following formule:
F.C.
100-(M + 1-1A + 0-18)

§ B.t.u. x1
~ 100-(1-1A + 0-18)

Dry, mm.-free F.C. = x 100

Moist, mm.-free B.t.u. 00

where:
mm. = mineral matter
B.t.u. = British thermal units
F.C. =percentage of fixed carbon
M  =percentage of moisture
A = percentage of ash
Ss = percentage of sulphur

Moist refers to the natural bed moisture of the coal, but doesn’t include visible water
on the surface of the coal.

1 From National Research Council, Report No. 814 (1939).
* If agglomerate, classify in low-volatile group of the bituminous class.

* Moist B.t.u. refers to coal containing its natural bed moisture but not including visible water
on the surface of the coal.

‘It is recognized that there may be non-caking varieties in each group of the bituminous class,

§ Coals having 69 per cent or more fixed carbon on the dry, mineral-matter-free basis shall be
classified according to fixed carbon, regardless of B.t.u.

¢ There are three varieties of coal in the high-volatile C bituminous coal group, namely, Variety
1, agglomerate and non-weathering; Variety 2, agglomerate and weathering; Variety 3, non-agglom-
erate and non-weathering.

PEACE RIVER CANYON COAL AREA

Peace River Canyon coal area extends from the foot of Peace River
Canyon to the head of the canyon, and includes all neighbouring ground
underlain by the Bullhead group along Gething, Aylard, Mogul, Moosebar,
and Johnson Creeks, to the south and west of the river, as well as the long

slopes of Portage Mountain to the north and east of the canyon (See
Figure 11).

The presence of coal along the walls of the canyon was first noted by
Alexander MacKenzie in 1793. Leases were acquired in the area by Neil
Gething and associates as long ago as 1908, and in 1912, C. F. J. Galloway
reported on the Canyon coalfields for the British Columbia Department of
Mines. F..H. McLearn examined the area during the 1922 field season,
and his report (1923) describes the coal occurrences in great detail.
Further investigations of the coal resources were made by F. H. McLearn
and EK. J. W. Irish in 1943.