New River Company: Iron Bridges
The New River Co was established to take spring water from Ware (Herts) to London. They installed a number of small standardised cast iron arch bridges to cross their waterways.
One of these bridges, dated at c.1837 by Historic England, is featured here.
Others here, here, and here. One here and here is clearly dated 1836. One here is apparently dated 1817, 'Span approx 4.5m. Inscribed `New River Co.', 'Priestfield Iron Works near Bilston' (Staffordshire).[1]. An 1824 example is listed here. An 1832 example near Enfield shown here.