Crews from the state Department of Transportation will begin replacing the Arsenal Street bridge in Watertown in the coming two years.
The $10 million project will lead to the creation of a temporary bridge in the fall of 2018 to limit the disruption for the over 20,000 vehicles that use that section of the city daily.
The main portion of the project would then begin in 2019.
City Council learned Monday that the state will be constructing the temporary bridge on the north side and not the south side near the railroad tracks.
DOT officials explained to members that building a road off south Massey that would connect with Waterman Drive was just too costly.