The state Department of Transportation is beginning a rehabilitation of the Putnam Bridge between Glastonbury and Wethersfield that will include lane closures during off-peak times for the next two years.
The $30 million project is set to begin on Monday on the four-lane bridge that takes Route 3 over the Connecticut River. The 2,400-foot-long span opened in 1959 and carries about 54,000 vehicles on an average day.
Lane closures are scheduled for weekdays from 10 a.m. to 3 p.m. and from 7 p.m. to 6 a.m. All lanes will be open on the weekends.
Crews will be repairing steel and concrete, replacing bearings and bridge joints, adding a sidewalk and resurfacing the bridge deck.
The span is named after William Putnam, who was chairman of the Greater Hartford Bridge Authority.