(This article is about the bridge at Betws-y-Coed. For other uses, see Waterloo Bridge (disambiguation).) Waterloo Bridge (Welsh: Pont Waterloo) is an early cast iron bridge, spanning the River Conwy at Betws-y-Coed, in Conwy county borough, north-west Wales. In 1923, the bridge’s masonry abutments were refurbished, and its superstructure was strengthened by encasing the inner three ribs in concrete. A 178mm reinforced cantilevered concrete deck was also added, which provided extra space for new footways; the cast iron parapet railings were re-erected on the outside of the new footways.