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Bores prepare for offshore wind farm

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SITE INVESTIGATION contractor Fugro has recently finished an overwater investigation for a proposed large scale offshore electricity generating facility off the east coast of England.

The Sarah-Jane windfarm will be one of the first large scale facilities of its kind in the UK. The site under review is 3km offshore from Great Yarmouth in Norfolk, on Scroby Sands in the southern North Sea.

Because of the relatively shallow water depth on the sand bank, conventional drill ships could not be used, so site investigation was carried out using one of marine drilling contractor Seacore's compact jack-up drilling platforms. The Skate 11/D is self-propelled and fitted with offshore positioning and signalling equipment. It can be dismantled allowing it to be transported by road.

The rig was on site for 10 weeks, and put down 40m deep boreholes across the site by cable percussive and triple-tube rotary coring methods. Samples were sent to Fugro's laboratory for soil and rock testing for foundation design.

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