Construction project managers are typically obsessed with time and deadlines. While setbacks are expected, some construction projects got so tangled up with time and resource problems that they stand out above the crowd. Which projects are on this dubious list? The Boston Central Artery/Tunnel Project, known as the Big Dig, lasted some 16 years, nine years overdue. The final price tag: $14.6 billion. In all fairness, we must note that the discovery of sunken ships buried in the earth caused some of the delays.