Reports of the Inspectors of Mines of the anthracite and bituminous ...

220 Reports of the Inspectoes of Mines. [Off. Doc.
moth vein forty-three feet, distance from bottom slate of Mammoth vein
to top slate of Seven-foot two hundred and eighty -nine feet, and the slope
is now sunk a distance of two hundred and thirty-one feet in the Seven-
foot vein, which is 10' 9 ' thick having 9' of coal. At one hundred and
twelve feet from knuckle of No. 5 slope the Skidmore vein was cut
5' 6"
thick having 3' of coal. Dip of these veins seven and one-half degrees
south.
Two additional bore-holes were put down (making eleven in all)
through which to convey silt and water to fill the space made by the
mining of the Mammoth vein. The first mention made of these bore-holes
was in my report for 1887, and this method of filling up the mine exca-
vations in connection with Kohinoor colliery has been in operation ever
since, and has been effectual to the extent that it has checked the surface
subsidence and i^revented the damaging of house properties. Mr. John
L. Williams, division superintendent of the P and R. Coal and Iron Company's
collieries in my district, who first conceived the idea of filling up
mine openings by bore-holes, is very jubilant over his success, and sev-
eral prominent mining men have inspected Kohinoor colliery with a view
of adopting the same means of filling mine excavations where practicable,
and I am informed by reliable autliority that it has been commenced
in the Wilkesbarre mining district.
At Indian Ridge colliery a new underground shaft has been sunk to the
Buck Mountain vein with three compartments, two hoistings 11' 8"x7'
and one pumping 11' 8 "x3', length of shaft one hundred and seventytwo
feet. The vein was cut thirteen feet thick on east side of shaft and
six feet on the west side and is very much confused, but in trial holes
driven north and south the vein is in its normal condition thirteen feet
thick with ten feet of cotd. The trial hole north passed through a dirt
fault ten yards long, beginning about forty yards from shaft. At forty
feet from top of shaft the Skidmore vein was cut 7' 8" thick with 6' 4"
of coal. At sixty-six feet from top of shaft the Seven-foot vein was cut
6' 11 " thick with 6' 4 "
of coal. A tunnel two hundred and eighty-nine
feet long was driven west from bottom of Buck Mountain subterraneous
slope through the fault and cut the Seven-foot vein 7' 10" thick with 6'
4" of coal. Two bore-holes have been drilled to conduct the ropes from
hoisting engine on surface to underground shaft.
At Knickerbocker colliery a new slope (called No. 4) has been sunk in
the top member of the Mammoth vein, a distance of three hundred and
sixty-two feet below the old water level drift, making a total distance
from surface to new gangways eight hundred and twenty -six feet. A
pair of engines, direct acting, have been (erected at top of this slope,
cylinders thirty inches and stroke sixty inches. A tunnel from top split,
first lift, east gangway (at breast one hundred and five), Avas extended
sixty-six feet through saddle from bottom split; total length of tunnel
one hundred and sixty-two feet, thickness of bottom split
5" of coal.
6' " with 4'