Town Bridge

Weymouth Town Bridge is a lifting bascule bridge in Weymouth, Dorset, England, connecting the formerly separate boroughs of Weymouth and Melcombe Regis. The bridge can be lifted to allow boats access to the inner backwater of Weymouth Harbour, known as Weymouth Marina. The bridge, opened in 1930, is the sixth to have been built across the harbour since 1597 and has been Grade II Listed since 1997. Today, the hydraulically-operated bridge is raised every two hours, 363 days of the year.

Source: Wikipedia