CYFARTHFA II BRIDGE Dismantled in the 1960’s and is in storage at the Cyfarthfa Museum. Built around 1798 it has a 62 foot span with a cast-iron arch from which the deck is suspended. It was built to carry the rail road cars over the River Taff between the upper and the lower part of the Works. It was designed by Watkin George. Another iron bridge at the Cyfarthfa Works is known only from a water color done by Penry Williams in 1825.