Movable Bridges: Dublin
George's Dock, North Wall. Balance rolling bridge constructed in 1860 by Turner and Gibson of Hammersmith Foundry, Dublin. Designed and patented by Michael Kenny, foreman at the Oxmantown Foundry. Crossed a waterway 47 ft wide.[1] [2]
Scherzer Bridges, North Wall Quay'. Built in 1912 [3]
Royal Canal. See here for an excellent summary of the various movable bridges which have spanned the Royal Canal, Dublin.[4].
A skew lift bridge immediately south of the Newcomen Street road bridge carries a railway branch line over the canal. It was constructed by Somers Railway Engineering.
The Spencer Bridge or Sheriff Street Bridge carrying Sheriff Street over Spencer Dock was described as a swivel bridge when opened in 1873. It was designed by James Price, and a wooden buoy 10ft diameter and 10ft deep supported much of the weight of the movable span. Replaced in 1941 by a lifting bridge or drawbridge.