PORTSMOUTH, N.H. — The New Hampshire Department of Transportation is beginning an inspection of the Sarah Mildred Long Bridge that connects Portsmouth, New Hampshire, and Kittery, Maine.

The New Hampshire DOT is warning motorists to expect delays due to lane closures when the inspection begins June 1.

The inspection is slated to last all week and could carry into the following Monday.

The Route 1 bridge, which is rated structurally deficient, is being replaced by a new, $160 million bridge, but the new bridge won’t be finished until 2017.