THDA was Lead Designer of the enabling and infrastructure works for the project which is one of the first garden cities to be built in the last 100 years.
Adjacent to the M25, the site has outline planning permission for 10,000 homes, 6 million sqft of commercial space and 3 million sqft of retail, leisure and community facilities. More than 40% of Ebbsfleet Valley will be open space and landscaped.
The site is situated on the Eastern Quarry at Ebbsfleet, and works included the design of 6 million m3 cut and fill, including quarry backfill in readiness for the residential development and dewatering of the existing filled quarry lake. An earthworks strategy plan was prepared based on the site wide earthworks remediation strategy, utilising material from borrow pits to replace existing contaminated surface materials.
Further works include the design of comprehensive land drainage and storm water storage systems and adoptable highway, as well as adoptable surface and foul water pumping stations and rising mains to offsite outfall in the River Thames.