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Drop Structures for the London Tideway Tunnels

Author(s): Joss Plant

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Keywords: IAHR; Hydrolink; Drop Structures; London Tideway Tunnels (LTT); Joss Plant


The 25-kilometer-long London Tideway Tunnels (LTT) system intercepts combined sewer overflows (CSOs) throughout central London to store, and then convey, stormwater and sewage to treatment at Beckton sewage treatment works (STW) in the east of the city. Drop structures are included at major drop shafts varying between 30-70 m in depth and at intermediate sub-surface locations. The primary drop structure types employed at the drop shafts involved tangential vortex-flow intakes, but cascades and direct drops are also utilised where applicable due to the complex and highly constrained nature of some of the sites. 


Year: 2024

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