The second tunnel boring machine (TBM) at start work on Tideway has passed factory testing and is on her way to London.
The TBM will dig a 4.5km Greenwich Connection Tunnel linking south-east London to the main super sewer tunnel beneath the Thames.
Annie was named after Annie Maunder, the first female astronomer to work at the Greenwich observatory.
Greenwich Pumping Station project manager Gareth Howells said: “Believe it or not, Annie is actually smaller than the machines digging the main tunnel, but it’s still an enormous piece of kit.
“At over 6m in diameter and more than 100m long it really is amazing to think that this machine will soon be tunnelling away beneath south-east London.”
When tunnelling starts from the site in Greenwich, it will be a 24-hour operation with an acoustic enclosure around the work.
Howells explained: “Because we’re investing in this acoustic enclosure, noise from the tunnelling will be contained so the impact on our neighbours will be limited by as much as possible.”
Once tunnelling is in full flow at Greenwich, much of the spoil will be taken from site by barge with Tideway investing in new infrastructure in Deptford Creek to facilitate the river transport.