abstract:The Thames Tunnel is an underwater tunnel, built beneath the River Thames in London, United Kingdom, connecting Rotherhithe and Wapping. It measures 35 feet (11 m) wide by 20 feet (6 m) high and is 1,300 feet (396 m) long, running at a depth of 75 feet (23 m) below the river's surface (measured at high tide).
The Thames Tideway Tunnel will be the width of three London buses and will run for 20 miles from west to east London, connecting up the 34 of the most polluting sewer overflows.