William Etheridge

William Etheridge (circa 1709 – 3 October 1776) was an English civil engineer and architect, best known for his work on several wooden bridges of mathematical design.

William Etheridge was born circa 1709 in a small village of Fressingfield, Suffolk, England. His parents were Charles Etheridge and Elizabeth Brett. He came from a long line of carpenters from Fressingfield and Stradbroke.

From 1744 to 1749 he worked on the supporting wooden structures during the construction of the Westminster Bridge, first as a foreman and then as the master carpenter.

Around 1748, he designed Old Walton Bridge.

Sometime before 1750, he designed the Old Bridge at Coleraine, Northern Ireland.

In 1752, George Semple consulted Etheridge on the rebuilding of Essex Bridge in Dublin.

Etheridge died on the 3 October 1776 in Westminster.

In 1747, businessman and plantation owner Samuel Dicker moved from Jamaica to a newly acquired estate in Mount Felix near Walton-on-Thames, Surrey, England. In order to facilitate easier access to his new home, he lobbied for an Act of Parliament granting him rights to build a bridge and collect tolls on the spot.

The resulting latticework wooden bridge, known as Old Walton Bridge was designed by William Etheridge and built by Mr White of Weybridge between 1748 and 1750. When it opened, its central span of 130 feet was the longest in Britain (succeeded in 1756 by William Edwards's 140 feet long single-arch Pontypridd Bridge). At the time, it was widely admired for its "strength, contrivance and remarkable great arch" and was even dubbed "the most beautiful wooden arch in the world" by one observer.

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