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United States, Massachusetts - us/31

Braintree Weymouth Wastewater

  Awarded to Modern/Continental, value $73 million for completion May, 2002 comprising three shafts, 700 m of 10 sq m drill/blast tunnel and 3.8 km drive using Wirth 4.13 m TBM from 73 m-deep Weymouth shaft to Nut Island to connect with existing tunnel from Deere Island. All in hard rock with some faulting. Shaftsinking underway with TBM drive scheduled to start late-summer, 2000. Visit www.wirth-drilling.com for details of the TBM. November 1999.   Award to Affholder/Barnard jv of 4.26 km of 3.2 m tunnel to accommodate 1.27 m-diameter water line. Robbins 91-155 TBM will commence in New Year on first section 1.06 km upgrade at 3.4 % followed by 3.2 km at 1.04 %. Machine currently under refurbishment by Affholder. November 1999.  Modern Continental underway from 67 m-deep King's Cove shaft on 3.6 km-long x 4 m-diameter Braintree-Weymouth sewer using double-shielded Wirth hardrock TBM in argillite for completion March, 2002. Also mining 668 m-long x 3 m x 3 m drill/blast connection under Fore river to Quincy. Visit www.mwra.com and www.wirth-europe.com 30/01.



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