Invitation to tender from pre-qualified contractors, deadline 29.10.2009, for construction of 8 km-long x 4.45 m-diameter rock TBM tunnel under San Francisco bay from Menlo Park to Newark together with two shafts. Contract estimated value EUR235-260 million for completion in 61 months. Tunnel will house 2.86 m-diameter steel water main. Contact Andrew Houston at SFPUC for further information, tel +1 415 551-4335 or -4603, e-mail rfp@sfwater.org. Pre-bid conference scheduled for 31.08.2009 at 10.00 h at San Francisco International Airport, Louis Turpen Aviation Museum. Visit www.sfwater.org, Construction Bid Opportunities, bid number WD-2531 for information on obtaining specs and docs. For list of SFPUC pre-qualified contractors, visit http://sfwater.org/msc_main.cfm/MC_ID/15/MSC_ID/150. 32/09.