Big Dig (1992–2006), Boston, Mass. $14.6 billion San Francisco – Oakland Bay Bridge East Span Replacement (2002–13) San Francisco/Oakland, Calif. $6.3 billion Mon-Fayette Expressway (1993–2013) southwest Pennsylvania/northern West Virginia $5 billion Ohio River Bridges Project (2005–20) Louisville, Ky./southern Indiana $4.1 … Continue reading →