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Sarah Mildred Long Bridge

Kittery, Maine and Portsmouth, New Hampshire

Owner: Maine Department of Transportation and
New Hampshire Department of Transportation

Segmental Bridge Design / Construction Engineering
and Inspection Support:

The Sarah Mildred Long Bridge carries US Route 1 Bypass and a heavy rail line that serves the Portsmouth Naval Shipyard over the Piscataqua River between Kittery, Maine and Portsmouth, New Hampshire. Coined “three bridges in one,” the crossing consists of vehicular approach bridges stacked over railroad approach bridges leading to a movable lift span over the navigation channel. The bridge’s pier shapes, tower concepts, railing, and other features were selected during community design workshops based on the community’s chosen theme of “Local Simplicity of the Working Waterway.”



Including the 2019 National Engineering Excellence Grand Award from the American Council of Engineering Companies
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