Reports of the Inspectors of Mines of the anthracite coal regions of ...

Ex. Doc] Reports of the Inspectors of Mines. 31
for drainage. A new breaker is also under way, and will be completed early
in 1878.
This collier}', when in operation, is estimated to have a capacity of yield-
ing two hundred and fifty cars per day, or twelve hundred and fifty tons,
and undoubtedly in future will be one of the largest producing collieries in
the anthracite coal region, as it will be only a question of handling and prepar-
ing of the coal outside. The shaft is three hundred and thirty three feet deep,
which gives about six hundred feet run on the dip of seam, (Mammoth,)
which, at this mine, is split into three separate seams, running from ten to
fourteen feet each in thickness. A tunnel has been driven south, opening the
Primrose vein in splendid condition, ranging from ten to twelve feet thick,
with a run on dip of seam one thousand and sixty feet, which will be
divided into six sections, (or lifts.) From the above named seams which
are already opened gives this colliery eighteen gangways, whilst the Skidmore
(seven foot) and Buck Mountain seams are untouched. There are also
four more overlaying seams, but basins before they reach the present shaft
level.
Kohliioor Colliery.
A new slope is being opened on the west side of the shaft, and which
will be continued down to the bottom of the basin; this will make the
second inside slope operated in this collier}' ; the present slope has been
in operation for some time, and is located on the east side of shaft, and is
down nearly fifteen hundred feet, on an angle varying from six degrees to
ten degrees below the shaft level. It has been discovered by the workings
running east from slope that the basin dips to the west. Therefore, with
the second new slope, it is intended to reach the deepest part of the cyn-
clinal axis.
Two pairs of the Burligh air compressors supply the motive power for
the present inside machinery. The new slope machinery will also be driven
by compressed air supplied by two pairs of the largest size Allison & Bannan
air compressors. Safety appliances have been attached to the water
tanks, on which the men are lowered and hoisted in and out of the mine.
The Howard pneumatic gong has been applied to the speaking tube.
This colliery is in first-class condition, money has not been spared
through all its various branches and departments to help to bring it to the
highest standard.
Knickerbocker Colliery.
A tunnel has been driven north from "Primrose" seam, cutting top
split of the " Mammoth," and is being continued to the bottom split.
Plank Ridge Colliery.
A tunnel has been driven from " Mammoth " seam, cutting Skidmore
seven feet and Buck Mountain. I understand that the coal remaining in
" Mammoth " seam in future will be taken out at the Indian Ridge shaft.