Work on Crossrail hit another milestone today as site workers began draining a cofferdam that will partly form the new Canary Wharf station.
Transport minister Sadiq Khan flicked the switch on pumps that will drain nearly 100Ml - the equivalent to 40 Olympic swimming pools - from the worksite over the next six weeks.
The pumps will transfer water from inside the site’s specially constructed cofferdam to the North Dock in Canary Wharf at a maximum rate of 13,500l per minute.
A station “box” will then be constructed in a dry environment - a similar technique to that used in the construction of the nearby Canary Wharf Tube station.
The water will be pumped through twin, 150mm pipes inside the cofferdam to reveal the future scale of the new station. As the water level lowers, pumping will temporarily stop to enable engineering adjustments to the cofferdam.
Once the water level drops to approximately 1m above the dock bed, specialist contractors will go into the dock to safely remove and relocate any fish and aquatic life that might be present.
“This mammoth project is crucial to the economic vitality of the Capital. Its benefits reach far beyond the fantastic new station at Canary Wharf, to every part of London - promising new jobs and opportunities, quicker journeys, and a less congested transport network,” said London mayor transport advisor Kulveer Ranger. “By 2026 every London borough will see at least a £14M boost to their economy thanks to Crossrail, and this latest milestone shows that we are well on our way to delivering it.”
“The Canary Wharf station will be a vital commuter link to the financial heart of Britain, and I’m glad to see it’s on schedule to deliver the benefits of Crossrail to passengers in this corner of the capital as soon as possible,” said Khan.
“Construction of Canary Wharf Crossrail station has made significant progress since work got underway in May last year. Draining of the cofferdam at North Dock will reveal the true scale and extent of the new station, the biggest on the Crossrail route,” said Crossrail chief executive Rob Holden.
“Work on Europe’s largest construction project continues apace elsewhere with preparatory work now underway at the Royal Oak tunnel portal site and also at Farringdon, Paddington and Tottenham Court Road. Construction at the remaining stations on Crossrail’s central section will begin later this year.”
Canary Wharf Group is designing and constructing the station on behalf of Crossrail. The enabling and civil engineering works are delivered by Expanded, a subsidiary of Laing O’Rourke.