PORTSMOUTH, N.H. (AP) — After logging 50,000 man-hours since construction began last fall, the Sarah Mildred Long Bridge replacement connecting Maine and New Hampshire is on schedule and moving along.

The $170 million replacement project is a joint venture between the states.

The Portsmouth Herald reports (http://bit.ly/1QZnBhd ) work on major parts of the bridge in Maine, Massachusetts and Alabama will begin the week of July 6.

The major mechanical components for the lift span are being built at G&G Steel in Russellville, Alabama. Concrete vehicular and railroad bridge segments are being cast at Unistress Corp in Pittsfield, Massachusetts. Work on the center span begins at Casco Bay Steel in Saco, Maine.

Construction is also underway at the Piscataqua River and the Port of New Hampshire to erect two temporary trestle bridges for workers.

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Information from: Portsmouth Herald, http://www.seacoastonline.com