Report of the Bureau of Mines of the Department of Internal Affairs of ...

•No. 10. SEVENTH BITUMINOUS DISTRICT. 413
conducted through its proper channel, whether there was any person
working in the mine or not, unless operations were indefinitely suspended.
8ome of tlie shelter holes were also obstructed by slate,
and the roadways were very wet and muddy. Quantity of air at
outlet, 18,000 cubic feet per minute. The mine is worked on the
double entry plan. The coal is mined by hand labor and is hauled
from the mine to the head of the incline plane by mules, and is then
run down the gravity plane to the tipple.
Montours.—This mine was in reasonably good condition when last
inspected. Quantity of air passing at the outlet, 86,000 cubic feet per
minute. The coal is mined by hand labor and the hauling is done by
the head and tail rope system. The mine is worked on the double
entry plan. A furnace is used to produce ventilation.
Mines West of the Allegheny River.
Tine Creek.—A\'as in reasonably good condition when last inspected
excepting that some of the shelter holes were obstructed by slate and
dirt. Quantity of air at inlet, 22,560 cubic feet per minute, and about
8,000 cubic feet was measui-ed near the face of the entries, where
the men were working. The system of working is that of double
entry. The coal is mined by hand labor and the hauling is done by
animal power. The ventilation is produced by a 12-foot fan of the
Ouibal type.
Hite.—This mine has been kept in
very good condition during the
year. The coal field is being developed on the double entry plan.
The coal is mined by hand lalxu' and is hauled from the mine to the
tipple by the head and tail rope system. An 8-foot single inlet Capell
fan is used to i)roduce the ventilation. Average quantity of air passing
near the face of the enlries, about 6,000 cubic feet per minute, and
48,000 cubic feet were measured at the outlet.
West Tarentum.—The condition of this mine has been improved
since my last report. The airways, doors and stoppings have been
rei)aired. I measured 5,900 cubic feet of air passing the outlet per
minute, which was being fairly well distributed to the face of the
workings of the two butt entries that were being driven. About
twenty miners only are employed.
lirakenridge.—The condition of this mine is favorable. Quantity
of air at the outlet, 16,800 cubic fe(4 per minute, which was being
fairly well distributed to the face of the workings. The coal is mined
by hand labor and is hauled from the mine by animal power. A furnace
is used to i)roduce ventilation.
Natrona.—This mine is worked principally on the single entry sys-
U'Ui. The coal is mined by hand labor, and it is hauled from the mine