Bluewater Quarry Haulage Tunnels

Owner:	Lend Lease (land owned by Blue Circle)
Client:	Costain Civil Engineering
Service:	Detailed design and construction supervision
Estimated cost:		Commencement:	October 24, 1995	Completion date:	November 29, 1995
Location:	Nr. Dartford Kent United Kingdom
Technical data:	Twin tunnels, 26 ft (8 m) span, length: 246 ft (75 m); 8 inch (200 mm) reinforced single pass shotcrete lining, 10 year design life.
Geology description:	Head deposits overlying upper Chalk. Grades III/II at tunnel elevation.
Geology types:	Hard rock
Categories:	Rural Highway Tunnel
Bid cost:		Final cost:	$500,000
Service areas:	Tunnel Design & Specialities