Contract awarded to Taylor Woodrow Construction/Perforex jv for 800 m tunnel through chalk cliffs using prevault system in which a slot is milled over the crown and pumped full of shotcrete prior to sequential excavation of the face. Partnership team combines the jv partners with Kent County Council, Brown & Root Civil, Halcrow, Taylor Woodrow Foundation Engineering and earthmover C A Blackwell. Safety Passport scheme in operation for underground workers. April 1998.
Successful breakthrough reported September, 1999. Claimed as a milestone in use of prevault method. October 1999.
