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A jack-up platform needed 25m long leg extensions,

A jack-up platform needed 25m long leg extensions, seen here being lowered into position on the platform, to cope with thick silt deposits on a recent overwater site investigation in Cork, Eire. Geotechnical contractor Norwest Holst Soil Engineering was using the John Howard Marine platform Zee Jack Major for part of the investigation for a new sewer across the tidal Lough Mahon. The channel is up to 10m deep in the centre and a further 10m thick silt layer meant that the extensions had to be fitted before work could start. The investigation, comprising 66 boreholes to a maximum depth of 41m, was completed in 12 weeks using three jack-up platforms.

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