Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 137,279 pages of information and 220,208 images on early companies, their products and the people who designed and built them.
at Marsh Mills, Plymouth
An early cast iron and timber tramroad bridge, which carried the Lee Moor Tramway (and prior to that, the Plymouth and Dartmoor Tramway?) over the river Plym. It is a very rare early example of the cast iron 'through arch' type. There are two spans with a central pier in the River Plym.
A small photo here shows one of the abutments, with a pair of rectangular openings above stone corbels, implying that horizontal timber beams were principal features of the structure. Below these are openings for diagonal struts.
1957 photo here, showing the distressed state of the bridge at that time, with a repair plate riveted over the junction of the two arches, and a collapsed timber strut.
English Heritage listing, with map, here.
Masonry repairs were carried out in 2013.