Mayor William Sapelli said he received the text late on a Friday afternoon earlier this month, and it was somewhat unexpected; he was anticipating word coming later. But it was very, very welcome. It came from state Lt. Gov. Karen Polito, and it said, in essence, that the state had approved what’s known as an acceleration agreement for the Morgan-Sullivan Bridge project. What that means is that money has been apportioned that will allow the general contractor, Palmer-based Northern Construction, to pay crews overtime to work on nights and weekends to accelerate (hence the name) the timeline for completing what amounts to a full replacement and widening of the 74-year-old bridge over the Westfield River.