1900 - Coalmininghistorypa.org

450 REPORT OF THE BUREAU OP MINES. Off. Doc.
The ventilation is produced by a Guibal fan, 20 foot diameter,
and on my last visit I measured on the return 64,800 cubic feet of
air per minute, which was being conveyed in two splits. The ventilation
at face of workings was fair, and the drainage could not be
complained of.
A slope was being driven to the Seymour vein, which is above the
present workings, with the view of mining the same.
New Mine.—This is a drift opening, and is not, as the name would
indicate, a new opening, but is oh the contrary a very old mine. I
measured a volume of 12,000 cubic feet of air traveling through the
mine in one current, but owing to the location of the furnace, the
ventilation at face of the workings was rather sluggish. The mine
was fairly well drained.
Mines of McGee & Ellsworth.
Antrim No. 1.—On my first visit I found the ventilation in this
mine being contaminated by black damp (C O) to such an extent that
the workmen had difficulty in keeping their lamps lighted, but upon
my second visit I found some improvement in this respect. A volume
of 30,200 cubic feet of air per minute was found passing around
the mine, fairly well conducted around the workings. The drainage
was fairly good.
Antrim No. 5.—The Blossburg and Seymour veins are both being
mined in this opening, and both veins are ventilated by the same current
of air. A volume of 40,000 cubic feet of air per minute was
measured on the inlet, which was well conducted, but was beingvitiated
by black damp (C O), from old workings, and in consequence,
the sanitary condition was not good. There could also be some
improvement made in the drainage.
Mines of the Jefferson Coal Company.
Coal Glen Nos. 1 and 2.—These openings are made into the "D"
vein, or Lower Freeport, and are about exhausted, the mining being
confined to pillar drawing.
Considering the broken condition of the workings, the ventilation
was very fair.
Coal Glen Nos. 3 and 4.—These openings are in the Upper Kittanning
seam and are connected and ventilated by the same air current.
The condition as to ventilation and drainage was good.
Beech Tree No. 2 Mine.—This mine has been leased during the year,
from the Rochester and Pittsburg Coal aud Iron Company, and
operations were begun during the latter part of the year.