The Dean Bridge spans the Water of Leith in the city of Edinburgh on the A90 road to Queensferry on the Firth of Forth. It carries the roadway, 447 feet (136 m) long and 39 feet (12 m) broad, on four arches rising 106 feet (32 m) above the river. The bridge was one of the last major works before retirement of the bridge designer, civil engineer Thomas Telford, and was completed in 1831 when he was seventy-three years old.