Penobscot Narrows Bridge, Prospect

4.7
#15 of 144 in Things to do in Mid Coast Maine
The Penobscot Narrows Bridge is a 2120ft long cable-stayed bridge that carries US 1/SR 3 over the Penobscot River. It connects Verona Island to Prospect, in the U.S. state of Maine. It replaced the Waldo–Hancock Bridge, built in 1931.Technical informationThe Penobscot Narrows Bridge is one of three bridges in the US constructed recently to utilize a cradle system that carries the strands within the stays from bridge deck to bridge deck, as a continuous element, eliminating anchorages in the pylons. Each epoxy-coated steel strand is carried inside the cradle in a one-inch steel tube. Each strand acts independently, allowing for removal, inspection and replacement of individual strands. The cable-stay system was designed with a system that uses pressurized nitrogen gas to defend against corrosion.In June 2007, six reference strands within three stays were replaced with carbon fiber strands – a first in the US. Monitoring on the strands will evaluate this material for future use in bridge designs. These engineering innovations helped the bridge appear in the December 2006 edition of Popular Science as one of the 100 best innovations of the year. The total project cost was $85 million.
Penobscot Narrows Bridge is just one of the many highlights you can arrange to see using our world travel planner, Prospect Edition.
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Reviews
TripAdvisor Traveler Rating
304 reviews
Google
4.6
TripAdvisor
  • August 14, 2017
    Happened upon this while driving US 1 from Bar Harbor to Rockland, and so glad we took the time to go up in the observatory! Did Fort Knox, too, and that was also very interesting. Great way to spend ...  more »
  • August 11, 2017
    Very cool bridge but hard to get a feel for it without stopping at Fort Knox to look at it. We were traveling to Bar Harbor and went a little out of the way to see this bridge.  more »
  • August 8, 2017
    Great views, a real Wonder of engineering, worth the trip. A 360-degree panorama of the Penobscot river basin. Adjacent is Fort Knox, also fascinating, a Civil War era battlement.  more »
Google
  • June 14, 2017
    You can go to see Fort Knox and for a few dollars more you can go to the top of the bridge tower to the observatory. It's the only one in the Western hemisphere, and the tallest in the world. It's just a neat experience all around.
  • July 4, 2017
    It was a beautiful day to go up on top and admire the views.
  • June 26, 2017
    A must see sight. You can see Fort Knox from top. 👍
  • January 18, 2017
    Awesome place to bring kids and friends, family!!! But I noticed on the road there is emergency phones but a very dim light for them. They need to have bright blue lights like on campuses.
  • November 29, 2016
    This was an unexpected sight, on our journey from Portland to Lubec. We loved the observation deck and Fort Knox! So much beauty and history.

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