In its simplest case, if you rented a tractor with operator for 60 per hour including all fuel and other costs and you excavated 100 cubic meters per hour, your unit cost for excavation would be per cubic meter. The hourly cost of the tractor with operator is called the machine rate.
Meet a Land of Extremes. Preposterously thin and unreasonably long, Chile stretches from the belly of South America to its foot, reaching from the driest desert on earth to vast southern glacial fields. Diverse landscapes unfurl over a 4300km stretch: parched dunes, fertile valleys, volcanoes, ancient forests, massive glaciers and fjords.