The main chamber roadway includes the main shaft and auxiliary shaft, central substation, water pump house, waiting room, main haulageway
, and passby roadway.
One of these improvements, already started in 1909 by Leach, was a crosscut adit that would become the 2200L haulageway
1150 feet (350 m) below the lowest production level.
The veins are approximately 500, 1000 and 1500 meters, respectively, southeast of the Tiro General (= General Shaft), the main deep haulageway
for Cerro Proano.
In it, investigators stressed slope and haulageway
maintenance and asked operators to ensure all haulage equipment is compatible with all conditions and haulage road grades.
The plan was to first remove the sloughing, decomposed granite that continues to build up over the old main haulageway
from the slope above.
Two additional adits were developed to facilitate access, the most recent being a 1-km-long, 6% inclined haulageway
at the 130-m level which provides a safe, internal truck route to the mill free from the dangers of avalanches and other wintertime hazards.
It shut down in February of 1975, in its later years sending its ore over a long haulageway
to the Kelley shaft for hoisting.
maintenance in the gates was a necessity to keep airways open and supplies coming.
It was discovered by a cooperative about 50 meters above the Zero Level, on the southeast side of the mountain: on working it downwards it was found to cut the busy main haulageway
(zero level) of the Pailaviri mine, a couple of kilometers from the entrance on the north side of the mountain.
In the summer, the increased humidity helps moisten the rock dust, while in the winter the rock dust dries quicly and more water is needed to minimize excess dust liberation from haulageways
The stope layouts are connected with shafts and haulageways
to complete the design.