Maidenhead Railway Bridge

Maidenhead Railway Bridge is a single structure of two tall wide red brick arches buttressed by two over-land smaller arches carrying the Great Western main line over the River Thames between Maidenhead, Berkshire and Taplow, Buckinghamshire, England. It crosses the river on the Maidenhead-Bray Reach which is between Boulter's Lock and Bray Lock and is near-centrally rooted in the downstream end of a very small island.

The Maidenhead Bridge was designed by the Great Western Railway Company's engineer, the noted mechanical and civil engineer Isambard Kingdom Brunel, and it was completed in 1838, but not brought into use until 1 July 1839. While it was being constructed, the innovative low-rise arches of the structure attracted considerable criticism and controversy surrounding their alleged lack of stability; as a result, the centring for the arches was left in place until its destruction during a heavy storm in late 1839, yet the arches stayed up, effectively vindicating Brunel's design. During 1861, dual-gauge track was installed across the structure, allowing both broad gauge and standard gauge services to cross it. During the late 1890s, the bridge was widened on either side to allow the structure to carry an arrangement of four standard gauge tracks, a task which was supervised by the civil engineer Sir John Fowler, who placed a high level of importance upon preserving the bridge's original design and appearance.

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