Blue Mountain Quarry

The Blue Mountain Quarry is a large slate quarry located in the mountains, near the bottom of Shane Dooiney on the Skarloey Railway. It has replaced the Skarloey Slate Quarry. The company is responsible for the supplying and transportation of slate and stone on the Island of Sodor.

History and Operations
The Skarloey Railway engines work primarily at the quarry, transporting and delivering the slate and stone to wherever it is needed around the island. Merrick and Owen are based here. The company owns many other vehicles that also assist with the workload. Many standard gauge engines have been known to work here, most frequently, Paxton, who carries the stone and slate along the standard gauge lines, where the smaller engines are unable to travel.

Blondin Bridge is also located at the quarry. The bridge once collapsed while being crossed by Rheneas, leading to the little engine becoming a runaway through the quarry. It was later rebuilt.

Since the seventeenth series, the narrow gauge line to the quarry has been changed to dual gauge to accommodate the standard gauge engines. A junction for the quarry is located north of Whiff's Waste Dump.

The company's logo consists of an incline with a truck on the ramp, the mountainous landscape as a backdrop, and the acronym of BMQ (Blue Mountain Quarry) situated at the bottom of the logo. All of the quarry vehicles acquire this logo on their liveries.

Appearances
Television Series= {{Scroll box|

Thomas & Friends

 * Series 16 - The Christmas Tree Express
 * Series 17 - Gordon Runs Dry, Luke's New Friend, The Switch and Gone Fishing
 * Series 18 - Disappearing Diesels, Long Lost Friend, Marion and the Dinosaurs and Samson at Your Service
 * Series 20 - Sidney Sings, Henry Gets the Express, Bradford the Brake Van, Saving Time and The Missing Breakdown Train
 * Series 21 - Runaway Engine
 * Series 22 - Seeing is Believing, Samson and the Fireworks and The Case of the Puzzling Parts
 * Series 23 - Diesel Do Right, Steam Team to the Rescue and Diesel Glows Away
 * Series 24 - The Great Little Railway Show and A New Arrival

Specials
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 * 2012 - Blue Mountain Mystery
 * 2013 - King of the Railway
 * 2016 - The Great Race
 * 2017 - Journey Beyond Sodor
 * 2018 - Big World! Big Adventures!
 * -|Other Media=

Magazine Stories

 * 2012 - Blue Mountain Mystery
 * 2014 - The Switch and Edward the Helpful Engine

Books
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 * 2012 - Blue Mountain Mystery, Risky Rails!, Hide-and-Seek Engines, Thomas' Giant Puzzle Book, Secret of the Green Engine and Blue Mountain Mystery: The Movie Storybook
 * 2013 - King of the Railway and The Lost Crown of Sodor
 * 2018 - Sleepytime Thomas

Trivia

 * The inspiration for the quarry came from the Dinorwic and Penrhyn Quarries.

Merchandise

 * TrackMaster
 * Motorized Railway
 * Take-n-Play
 * Tomica
 * Wooden Railway
 * Collectible Railway
 * Adventures
 * Mega Bloks
 * Motorized