Early designs for N.H.-Maine bridge revealed
Designers for the new Sarah Mildred Long Bridge connecting Maine and New Hampshire have unveiled conceptual plans for the project, which could use tidal power to supply electricity for the bridge and incorporate an innovative lift span design.
The Portsmouth Herald reported designers from FIGG Engineering presented their design work, which they said is about 30% complete, at a meeting in Kittery Wednesday. Those plans call for the span of bridge that will rise to allow ships to pass to be 250 feet long, more than the 204 feet outlined in previous design plans. The paper reported the change was made in consultation with local tugboat companies. Designers expect the lift span will be the first in the country to incorporate a design similar to the Pont Bacalan-Bastide Bridge in Bordeaux, France, which has four separate concrete lift towers.
The designers are working with a team of researchers at the University of New Hampshire to explore using tidal power to support some portion of the bridge’s electricity use.
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