7 1 0You have to deliver any cargo to the quarries (not from them!).The 2 quarries are located in Carson City and in Elko as seen in the pics below, owned by the Coastline Mining company: #emanuele_mauri | iPLAY4FUN | Live | myBlog
5 0 0You need to deliver to Coastline Mining in Elko and Carson City. Easily found by sorting by recipient on the Quick Jobs screen. Note: there is also a Coastline Mining in Pioche as well, but it's not a quarry and doesn't count for this achievement.