
Yesterday Mayor McGinn held a press briefing with Thom Neff, a Strategic Infrastructure Management Consultant that the Mayor had retained to complete a risk analysis on the likelihood of on-budget, on-time completion of the Alaskan Way Viaduct replacement tunnel. Neff, with a 40-year vocational history managing large tunneling projects (including Boston’s Central Artery, the “Big Dig”), offered a cautiously pessimistic assessment of the project. Noting that the tunnel represented technology “at or beyond precedent” in the “worst geologic environment [he’d] ever seen,” Neff said that the project presents a substantial risk of exceeding budget and a moderate risk of not being completed at all. Among the geological anomalies, historical glaciation was so extensive that there is “residual lateral stress at depth” that “exceeds the vertical pressure.”
Everyone expected our anti-tunnel Mayor’s hand-picked consultant to say such things, but Neff was impressive and decidedly apolitical, stressing that, “I love tunnels, that’s what I do. But some tunnels shouldn’t be built.”
More after the jump. Continue reading “McGinn’s Consultant: “Worst Geologic Setting I’ve Ever Seen””