The handling equipment used at Pedro Miguel and Miraflores locks was entirely different
from that at Gatun. At Pedro Miguel, Berm cranes, containing the mixing machinery, were
stationed at the head of the lock, with arms extending on either side, from which grab
buckets were lowered to pick up sand and rock, as the case might be.

The finished product was carried by these trains into the lock chambers.
Many of the old French locomotives were repaired and used for this work.