A DKK950M (£90M) deal to extend Køge Harbour in Copenhagen using 2Mt of contaminated soil has been signed between Køge Municipality and contractor Aarsleff.
Under the partnering deal, Aarsleff will reclaim the near shore area into a 40ha harbour extension with soil from the Greater Copenhagen area.
The contaminated soils will be retained by a 1.3km long sheet piled wall. Soils will be capped off by impermeable layers and secured below by the clays on the sea bed.
Construction will also include 1.3Mt of stone works.
'The impermeable clays on the sea bed are ideal for the purpose and are a prerequisite for this project, ' Aarsleff general manager Ebbe Malte Iversen told GE. 'It's going to be a major challenge because we have to have this construction ready in 18 months when we will start to receive the soil.'
Contaminated soil will ll the new harbour area over 12 years with fees received for each tonne.
'The fees we received will provide signicant ance, ' said Iversen.
'Stretching it over a long period of time makes it more likely we will realise the total [monetary] value of the soils.
'The huge volume of soil, quick start to the construction and that the project is partly nanced by the polluted material makes this an interesting project, ' he added.