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'Gasworks Bridge' or 'Gas Works Bridge' crosses the River Calder in Sowerby Bridge, Yorkshire.
This was originally built in 1816, with castings from Aydon and Elwell for Thos. Fearnside & Son of Mearclough Bottom Mill. However, the original is largely hidden from view by a superimposed bridge of riveted iron or steel plates. Originally a road bridge, it is now only used for pedestrians.
One of the original maker's plates is displayed in Calderdale Industrial Museum (see photo).
Grade II listing information and map here.
As originally built it would have had an elegant appearance. There were four arch ribs and radial spandrel members, all of slender I-section. The bridge probably looked like little-altered Aydon & Elwell examples elsewhere in Yorkshire (Newlay Bridge and Walton Hall Bridge).