No other such cases are known on navigable waterways worldwide, although other pylons have been constructed across former waterways that have been filled in with rubble and soil, such as the Manchester, Bolton and Bury Canal & Wey and Arun Canal at Rowner Lock.
The tunnel entrance, with its exhibition and boat trips, can easily be reached by walking along the towpath of the Huddersfield Narrow Canal, which runs adjacent to the station.
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The River Colne and the Huddersfield Narrow Canal provided early transport links which were soon added to by road and railway links to Huddersfield and Leeds to the east and Manchester and Liverpool to the west.
Longroyd Bridge is where the A62, Manchester Road, route to Manchester passes over the Huddersfield Narrow Canal and the River Colne, it then travels down through the Colne Valley passing Milnsbridge, Linthwaite, and Slaithwaite to Marsden before crossing the Pennine hills to Oldham and Manchester.
The Huddersfield Narrow Canal provided a heavily-locked Western connection to wool-weaving towns of the upper Colne valley (Golcar, Linthwaite, Slaithwaite, and Marsden) and across the Pennines to Saddleworth, Stalybridge and Manchester via Standedge Tunnel.
The Rochdale is significant for leisure boating in that it is one of the three canals which cross the Pennines and thus join north-western canals with the waterways of the North East, as well as opening the possibilities of touring various Pennine Rings (the Huddersfield Narrow Canal had reopened the year before, and the Leeds and Liverpool Canal had never closed).