Galliford Try, Costain and Atkins have signed a major water contract worth £180 million.
The deal to upgrade and extend Liverpool waste water treatment works for United Utilities has just reached financial close.
The three firms will work through a joint venture for the contract, which was first announced in May last year.
The work includes the construction of a two-storey sequential batch reactor plant in the disused Wellington Dock, as well as upgrades to the existing works in the adjacent Sandon Dock to the north of Liverpool city centre.
The joint venture was appointed to work on United Utilities’ AMP5 schemes in April 2010 and the Liverpool scheme will be part of the existing framework arrangements.
Greg Fitzgerald, chief executive of Galliford Try, said: “We are delighted to secure this business from an existing framework client. It builds on our track record of delivering both clean and waste water infrastructure projects.”