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A basculebridge is a drawbridge with a counterweight that continuously balances the span, or "leaf", throughout the entire upward swing in providing clearance for boat traffic.
Bascule is a French term for seesaw and balance, and basculebridges operate along the same principle.
Although the basculebridge has been in use since ancient times, it was not until the 1850s that engineers developed the ability to move very long, heavy spans quickly enough for practical application.
A traditional fixed bridge could not be built because it would cut off access to the port facilities situated at that time in the Pool of London, between LondonBridge and the Tower of London.
The bridge was opened on 30 June 1894 by the Prince of Wales, the future King Edward VII of the United Kingdom, and his wife, Alexandra of Denmark.
The bridge is near the Tower of London, St Katharine Docks, and Shad Thames.
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