Access to the underground workings at the La Camorra mine is via a ramp from the surface, excavated at a -15% grade and connecting numerous levels.
The La Camorra mine began operations in 1955.
( z1 begin :ARG1 ( z2 operate :ARG1 ( z3 mine :name ( z4 name :op "La" :op "Camorra" :op "Mine" ) ) ) :time ( z5 date-entity :year 1955 ) )