New Civil Engineer: "Hammersmith ‘flyunder’ construction could begin by end of decade"
"Construction of the proposed Hammersmith ‘flyunder’ could begin within five years, assuming various planning and financing hurdles are overcome.
" 'We are about two to three years behind the Silvertown Tunnel, which has an estimated start date of 2017,' said Nick Boyle, transportation and development manager for the London Borough of Hammersmith & Fulham (LBHF).
"He was speaking at a briefing on the progress of the flyunder scheme. LBHF is proposing construction of a tunnel to replace the Hammersmith Flyover, which was closed for emergency repairs in 2011. "
"A Halcrow-produced feasibility study published in March suggested three options: a 15m-deep, cut-and-cover tunnel, costing £218M, and running along the 1.6km route of the existing flyover; a longer, more expensive twin-bore tunnel, costing up to £1.7bn and stretching for 4.1km between Chiswick and Earl’s Court; and another twin-bore tunnel, 3.5km long, which would emerge at North End Road.
"The report found no subterranean ‘showstoppers’, and the twin-bore tunnel would run through London clay at a depth of up to 25m.
"Since the study was published, the Conservatives have been replaced as majority party in LBHF by Labour. However, Boyle said the new administration was supporting the flyunder plans. Councillor Andrew Jones, cabinet member for economic development and regeneration, is now responsible for progressing the project."