Pontypridd Bridge, Stone arch bridge in Pontypridd, Wales
Pontypridd Bridge is a stone arch structure spanning the River Taff in Pontypridd, Wales. The single arch rises roughly 10 meters high with three cylindrical openings at each end that help reduce the weight of the construction.
William Edwards completed the structure in 1756 after three failed attempts, creating what became the longest single-span stone arch in Europe at that time. His solution using the weight-reducing openings marked the technical breakthrough after years of experimentation.
The design drew landscape painters including Richard Wilson and JMW Turner who recorded its engineering features in their works. This artistic attention helped establish the structure as a symbol of Welsh engineering achievement during the 18th century.
The steep gradient led to the construction of Victoria Bridge in 1857, which offered an easier route for wheeled traffic. Today the structure serves only pedestrians and provides a clear view of the river from its midpoint.
The three circular openings at each end have different diameters, a refined detail Edwards developed to further lighten the masonry. This arrangement was uncommon for the period and shows his experimental approach to bridge building.
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