In very challenging weather conditions Danish contractor Per Aarsleff is installing its largest profile and one of its longest combination steel pile retaining walls for the extension to the container terminal in the Port of Muuga on the Gulf of Finland south coast, 17km east of the Estonian capital Tallinn. The site team, with its fleet of specialist marine plant, has been coping with freezing temperatures, strong winds and rough seas at the exposed site to accurately drive over 420 tubular steel piles up to 1.67m diameter and 45m long into the seabed.