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

250 Reports of the Inspectors of Mines. [Off. Doc.
16" cylinder by 24" stroke, has been placed in said slope. A new pump
liouse has been made in Mammoth vein 46' long-, 15' wide by 12' high
and timbered throughout to accomodate said pump. Several minor improvements
have been made around the breaker for the purpose of
handling" the coal coming from the Western slope.
Preston No. 3 Colliery.—The tunnel mentioned in my last report as
'g-oing south, has now reached the north dip of the Mammoth vein in
Mahanoy basin ; the vein is in good condition, dip 54° north. The total
leng-th of the tunnel from starting point to present face is 1,100'. This
will give six gangways on the Mammoth vein, making the colliery one
of the best in this section. A new duplex pump has been placed at
second level with a steam cylinder 36" diameter and 48 " stroke and 12 "
ram; twelve boilers 40" diameter, 25' 3" long, and twelve boilers 36
diameter, 22' 8" long, with boiler house and all necessary connections
have been erected during- the year.
Beliance Colliery.—A pair of link motion hoisting- engines with drum
and all necessary connections have been erected at the Tender slope.
A new frame engine house, with corrugated iron roof and sides, has been
built over the engines. A new water line has been laid from Bear Gap
Water Company's line to the colliery tanks. A water level tunnel 65
yards long has been di'iven west of breaker, cutting the Skidmore vein
5' 10" thick, having- a north dip of 25°. A new track has been laid from
above tunnel to head of breaker. A new lift has been driven up the
pitch from No. 5 to No. 4 level. A standard 9 " X 38" steam pump has
been placed at water level and connected to old column line and is used
for the purpose of pumping water to the jigs located in breaker.
Alaska Shaft.—The Mammoth vein fan has been repaired and a new
casing- placed over it. The boilers which supplied the steam for fan and
tender engine have been removed. The steam is now supplied from the
main steam plant located at shaft. A steam line 380' long and 8" in
diameter has been laid from boilers to pumps at floor of shaft. A new
steam line 2,300' long and 4" in diameter has been laid from boilers to
hoisting engine at bore hole. The engine Avas formerly underground,
but has been replaced by one on the surface. Two bore holes 187' longby
6" diameter have been bored to run the hoisting rope through. A
tunnel 363' long was driven from the southwest gangway of Mammoth
vein south to the Skidmore, cutting the vein 8' 3 " thick, 7' 3" of which
is g-ood coal. A new self-acting plane 544' long- was driven in the Skidmore
vein. This plane will be worked in two lifts. The drum room and
the grading are noAV completed.
Buck Ridge Colliery.—K new lift of 110 yards has been completed
during the year on the No. 8 vein. A tunnel 15 yards long has been
driven north to No. 9 vein. A gangway has been driven east on No. 9
vein for a distance of 236' to a point directly under No. 9 vein slope.
A hole is now being driven up to connect with the bottom of No. 9 vein
"