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The surge bin was mined 42 ft from the breakthrough of the bored raise to allow the Alimak raising and the raise reaming to take place concurrently so that the ore system was ready for use when the reaming was completed.
On this same project the two system worked together again when a 10-ft-dia borehole was drilled 1,000 ft with an 82R raise drill and then the Alimak was used to install rail throughout the raise to facilitate concrete lining of the raise.
Men worked off this platform with hand-held drills to drill up-holes to slash the raise to full size.