Tal-y-Cafn Bridge
This is the only road bridge over the River Conwy between Conwy and Llanrwst.
The first bridge, opened in 1897, was a steel lattice girder bridge. The Engineers were W. Alfred Dawson and Alfred Fyson. The main contractor was Alfred Thorne. The steelwork contractor was the Horseley Co, and the masonry contractor Rice Roberts of Llangefni.[1] [2]
The 1897 bridge was replaced in 1977-8 by the present Callender-Hamilton Bridge, using part of the original abutments and truncated cast iron piers. It was assembled through and around the old bridge. Once completed, the new bridge was lowered onto the piers by cutting away piece-by-piece the old bridge.
The bridge also carries water in a pipe from Llyn Dulyn and Llyn Melynllyn in the Carneddau mountains to the coastal town of Llandudno.
Some of the above information is condensed from the Wikipedia entry for Tal-y-Cafn.