TOPSHAM — Preliminary reconstruction of Interstate 295 northbound has begun, causing a lane closure between Exit 28 in Brunswick and Exit 31 in Topsham.

The full closure of the northbound lanes will follow when work begins on June 15 for the stretch of I-295 running from Topsham to Gardiner. The project is expected to wrap up in August.

Pike Industries won the bid for the project in March. The cost is about $35.3 million, funded by the American Recovery and Reinvestment Act.

During full construction, crossovers will divert northbound traffic onto I-295 southbound, which was rehabilitated last year. Route 201 and the Maine Turnpike will facilitate southbound traffic detoured from I-295.

A Topsham on-ramp used for detoured traffic last year will be utilized again this year. The ramp allows southbound Route 201 traffic to avoid the busy Route 196-Route201 area.