A bowed steel truss, inset railway track and glazed control tower preserve a rare Scottish example of a dock railway swing bridge.
Quick facts
- Date
- 1906
- Architect / designer
- D A Mathieson, engineer; Motherwell Bridge and Engineering Company, contractor
- Type
- Hydraulic steel railway swing bridge and control tower
- Designation
- Listed building, Category B (LB34048)
- OS grid reference
- NS 93243 82622
Architecture and continuing use
The 161-foot span uses a Pratt truss with three light lattice girders overhead. A timber deck contains the former track, while the highly glazed timber control tower resembles a railway signal box and retains an external stair.
Its story
The Caledonian Railway opened the bridge in 1906 as part of an enlarged dock and railway system. Hydraulic machinery allowed the 165-ton span to turn clear of shipping. Rail operation later ceased, but the bridge survives beside active docks.
Why it is included
Category B listing identifies it as one of only two surviving Scottish swing bridges of this particular type and an unusually complete union of rail, water and control technology.
What to notice
- Curved top chords of the steel trusses.
- Rail line retained within the timber deck.
- Glazed control cabin and lattice-post signal.
Reading the surroundings
Do not attempt to reach or cross the bridge. It is inside operational port land with industrial, water and structural hazards; view only from lawful public locations if available.
Timeline
- 1906 The Caledonian Railway opened the hydraulic bridge with the expanded docks.
- By 1985 Rail signalling associated with the western cut had ceased.
- 1994 The bridge received Category B statutory protection.
What we know — and what remains uncertain
The bridge’s present mechanical operability was not established. Survival should not be confused with a functioning public route.
Sources & further reading
- Historic Environment Scotland: Carron Dock and Western Channel Swing Bridge, LB34048 — Current designation status, mapped location, date, fabric and architectural or archaeological interest.
- Trove designation: LB34048 — Parallel national record identity and archival context.
- Forth Ports: Port of Grangemouth — Current secure-port operations and wider transport setting.
- Trove place record: Grangemouth Docks — Dock chronology, bridge identity and later heavy-load context.
Location
OS grid reference NS 93243 82622 · Location confidence: High: the current national designation supplies an exact mapped National Grid Reference; public text separately states access and current-use uncertainty. · Select the marker to open its satellite view in Google Maps. On desktop, drag Pegman (the yellow figure) onto a blue road. On mobile, turn on the Street View layer and tap a blue road. Other photo markers may be user-contributed.
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