The set of the Centre Island Quarry

The Centre Island Quarry is the quarry where Bill, Ben, and Mavis work and sleep. It was first seen in the sixth season, and has engine sheds, rock hoppers, and large buildings. Salty, Diesel, Thomas, Percy, Fergus, Toby, 'Arry and Bert have been seen working here. As well as mining quarry rock, there is a section of the quarry which mines slate.