1900 - Coalmininghistorypa.org

444 REPORT OF THE BUREAU OF MINES. Off. Doc.
by a small fan, and, if the foreman would only give the details of ventilation
more attention, the condition of the mine would be very
satisfactory.
Walston No. 1.—Was not in operation during the year.
Mines of the Jefferson and Clearfield Coal and Iron Company.
Rochester Mine.—Is an old mine and covers a very large territory,
and, owing to the number of abandoned workings, it is rather
difficult to ventilate, and owing to the irregular grade of the seam,
good drainage is not easily maintained, but, notwithstanding these
difficulties, the mine has been found in a reasonably good condition.
Seventy-two thousand cubic feet of air per minute was being produced,
which was fairly well conducted to face of workings.
Sandy Lick Mine.—This mine also has the same difficulties as the
Rochester mine (being in the same field), regarding ventilation and
drainage, but a new shaft was sunk during the year near the face
of workings, and a fan installed at the bottom, which produces an
ample volume of air at the point where it is most needed.
I measured a volume of 50,400 cubic feet of air on the inlet, which
was being fairly well conducted around the workings. The drainage
was in fair condition.
London Mine.—The condition of this mine during the early part
of the year, as regards ventilation, was not very good, but a large
Capell fan was erected, which has put the mine in a good healthful
condition.
This fan was producing a volume of 100,000 cubic feet of
air per minute, which was being conducted in three splits around the
mine. It was also reasonably well drained.
Pancoast Mine.—This is a small operation and does not employ
very many persons inside. It was found in a reasonably good condition,
with a volume of 20,800 cubic feet of air per minute, circulating
around the workings, and was fairly well drained.
Mines of the Northwestern Mining and Exchange Company.
The mines of this company have been in operation steadily during
the entire year.
Dagus No. 1 Mine.—This is a very large mine, employing a large
number of persons inside. The product is conveyed from the body
of the mine to foot of slope by the tail rope system of haulage, which
works very successfully.
The ventilation is produced by a large Capell fan, but the results
obtained are not very gratifying, owing to the contracted condition
of the return airway.