The original bridge structure dates from the 15th century, succeeding many wooden structures before it. Until the 18th century it was the only bridge crossing of the Tweed above Kelso. Rebuilt in 1663 using stone from the ruined St Andrew's Church, it had additional arches added in 1799, by John Hislop; it was widened twice - from 8 feet (2.4 m) to 21 feet (6.4 m) in 1834 by John and Thomas Smith and from 21 feet (6.4 m) to 40 feet (12 m) in 1900 by McTaggart, Cowan & Barker. The dolphin lamps on the bridge are contemporary with the 1900 widening. You can clearly see evidence of all the widening work on the underside of the bridge. Tweed Bridge carries the B7062 and is the only road crossing over the River Tweed in Peebles, and can therefore get quite busy at peak times.