It is used especially for hauling earth and crushed rock. It was ultimately surfaced with of crushed rock and gravel. This can involve adding crushed rock or chemical soil supplements. The tarmac on some roads melted in England, requiring application of crushed rock dust. They produce sand, gravel, and crushed rock for roadwork and construction use. The dollar returns on the crushed rock were much less than had been predicted. The top ten companies provided 45 percent of the crushed rock produced in the US. Crushed rock, decomposed granite, fine wood chips are also used. The crushed rock trail is open year-round to non-motorized travel.