Boulder Quarry

Boulder Quarry was probably the most short-lived industry on the Island of Sodor. It only appeared in the fifth season episode, Rusty and the Boulder.

Built up in the mountains, the quarry was operated by the narrow gauge engines, who transported the collected rock to Thomas and Percy at the exchange sidings. However, Thumper was digging into the mountain with a boulder on top of it and the boulder fell down the mountain and landed on the track, causing chaos and runaways. After this, the Fat Controller decided to close down the quarry.