Contract for 1.6 km replacement wastewater tunnel under Charleston harbour awarded to Affholder Inc at value $10.68 million with notice to proceed expected end-April. Facility designed by Jordan, Jones & Goulding for the Charleston Commissioners of Public Works will comprise 1.4 m RC pipe in 2.5 m-diameter TBM-driven tunnel in stiff, silty clay with rib and lagging support. Carrier pipe will be installed and annulus back-filled with cellular grout. Affholder will use its Lovat M96/104 TBM from its recent Houston Fulton Conveyance contract. More from www.lovat.com May 2000.
URS designing $12 million, 1.28 km-long x 3 m-diameter tunnel with 18 drop shafts in sandy, silty clay underlain by marl as an overflow for existing system in downtown Charleston. Should bid late-2001. Visit www.urscorp.com 33/01.
