Boston's Big Dig cost overruns (1985-2007)
Boston's Central Artery/Tunnel project, known as the Big Dig, was first estimated at $2.8 billion in the late 1980s and opened in 2007 at a final cost above $14 billion. Officials repeatedly approved additional funding rather than stop a project too far along to abandon.
The highway was rebuilt and buried, but at roughly five times the original estimate.
It became the standard example of public infrastructure cost overruns and the political difficulty of halting large projects.
Greenville's council faced the same choice in miniature: cover an overage or pause the work. It chose to fund the gap, accepting cost growth to avoid delay.
