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 mine has been in operation for more than 33 years as of 2019.
( z1 operate :ARG1 ( z2 mine ) :duration ( z3 more-than :op ( z4 temporal-quantity :quant 33 :unit ( z5 year ) ) ) :time ( z6 as-of :op ( z7 date-entity :year 2019 ) ) )