The Tin Tunnel, a spark Arresting tube about 744 feet long over the line, was built over a section of the Penicuik Railway to protect the Rosslyn Gunpowder Works, below and to its west, from sparks from locomotives.
Nearby stations Rosslyn Castle Rosslynlee Hospital Halt Rosslynlee Auchendinny Roslin Glencorse Eskbridge Rosewell and Hawthornden Pomathorn Halt Penicuik [2nd] Polton Loanhead Lasswade Bonnyrigg Broomieknowe | Rosslyn Gunpowder Works Firth Viaduct Old Woodhouselee Tunnel Rosslyn Carpet Factory Dalmore Mill Auchendinny Tunnel Auchendinny Viaduct Roslin Colliery Glencorse Viaduct Glencorse Tunnel Tourist/other Rosslynlee Hospital Roslin Castle Firth Crossing Rosslyn Chapel Glencorse Barracks |
Location names in dark blue are on the same original line. |
An Illustrated History of Edinburgh's Railways | Forgotten Railways: Scotland | Old Penicuik |