 When he was appointed chairman of the Turnpike Authority in 2002, Amorello, a longtime state senator from Grafton, inherited the Big Dig project that was already billions of dollars over budget and years past the original completion date.His task was to get it finished and he did.A year later he was cutting the ribbons to open both the north and south sides of the Thomas P. O’Neill Jr. tunnels, and the I-90 Connector Tunnel but by 2005, both tunnels were leaking.