Henry's Tunnel

The Ballahoo Tunnels, commonly known as "Henry's Tunnel", are a two-bore tunnel situated to the east of Ballahoo, on the Main Line.

History
The Sodor and Mainland Railway originally attempted to cut a tunnel through the Ballahoo Ridge. However, it collapsed during construction, resulting in the railway only running trains between Ballahoo and Kirk Ronan.

After its foundation in 1915, the North Western Railway constructed its own tunnel in order to reach Vicarstown. The NWR was built as a strategic railway in a time of emergency. Speed and cheapness of construction were paramount, so a single line bore only was cut, with the Up and Down lines being gauntletted. While work was in progress, a section in the centre collapsed, leaving two tunnels (the Western - 1 mile, and the Eastern, or Henry’s - 450 yards).

The tunnel gained its nickname in 1922 after Henry refused to come out, claiming that the rain would spoil his "lovely green paint with red stripes", and was subsequently bricked up after three failed attempts to get him out. A second bore was cut alongside to provide a double line and Henry was eventually let out sometime in 1923 to help with the express. In 2011, the tunnel collapsed but was repaired in time for the unveiling of the Thin Clergyman's bust at Tidmouth.

In the first season of the television series, Henry stopped in the tunnel (like in the Railway Series). In the fourth season, the tunnel was blocked by an elephant and Henry had to take some workmen to clear it. In the thirteenth season, while painted pink, James hid in the tunnel. In the nineteenth season, Thomas hid in the tunnel from the Fat Controller after lying about an accident.

Thomas & Friends
It will appear in the twenty-third season.
 * Season 1 - Thomas and Gordon, The Sad Story of Henry, Edward, Gordon and Henry, Thomas and the Trucks, James and the Coaches and James and the Express (mentioned)
 * Season 2 - Percy Takes the Plunge (mentioned)
 * Season 4 - Bowled Out (deleted scene) and Henry and the Elephant
 * Season 7 - Emily's New Coaches, What's the Matter with Henry?, The Spotless Record, Peace and Quiet, Bulgy Rides Again, Best Dressed Engine (stock footage) and Gordon and Spencer
 * Jack and the Sodor Construction Company - Thomas and the Moles (mentioned)
 * Season 8 - Thomas to the Rescue, Edward the Great, Emily's Adventure, Halloween and Chickens to School
 * Season 12 - James Works it Out (mentioned)
 * Season 13 - Tickled Pink and Play Time
 * Season 14 - Charlie and Eddie
 * Season 17 - Calm Down Caitlin and Bill or Ben?
 * Season 19 - Who's Geoffrey? and Best Engine Ever
 * Season 21 - Confused Coaches
 * Season 22 - Hunt the Truck

Specials

 * 2005 - Calling All Engines! (stock footage)
 * 2008 - The Great Discovery (music video)
 * 2011 - Day of the Diesels
 * 2012 - Blue Mountain Mystery
 * 2015 - The Adventure Begins
 * 2016 - The Great Race
 * 2018 - Big World! Big Adventures! (mentioned)

Trivia

 * In Wilbert Awdry's original drawing, the tunnel had one track instead of three.
 * Henry's Tunnel has had numerous modifications throughout the years:
 * Season 1:
 * One tunnel bore had two tracks and the other bore had one track.
 * Season 4:
 * The numerous switch tracks and the siding disappeared.
 * Season 7:
 * A signal box and water tower had appeared and disappeared at the portal.
 * Each bore had one track.
 * Season 8:
 * Both bores had two tracks.
 * Season 13:
 * The tunnel seemed to get shorter, since its other end was visible.
 * Blue Mountain Mystery (only):
 * The tunnel was seen in a flashback and it had one track in each bore.
 * The Adventure Begins:
 * Two switch tracks were added in front of the signal box.
 * The tracks became slightly curved on the opposite of the tunnel.

Merchandise
[Collapse]  The Main Line
 * Wooden Railway (discontinued)
 * Brio (discontinued)