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Waldo County

Ducktrap River Bridge [Map]
Lost Concrete tee beam bridge over Ducktrap River on US 1
Replaced by new bridge
Lower deck built in 1920; upper deck built in 1932; Replaced in 1999

Marsh Stream Railroad Bridge [Map]
Girder bridge over Marsh Stream on Bangor & Aroostook Railroad
Built 1905

Memorial Bridge [Map]
Steel stringer bridge over Passagassawakeag River on a pedestrian trail (former Route 1) in Belfast
Open to traffic
Built 1921, reopened as a pedestrian bridge in 2010

Penobscot River Bridge [Map]
Cable-stayed bridge over Penobscot River on US Hwy 1 & 3
Open to traffic
Built 2006

Waldo-Hancock Bridge [Map · Street View]
Demolished suspension bridge over Penobscot River on former US 1 in Prospect
Demolished, despite not being in the way of anything.
Built 1931; bypassed by new bridge 2006-07; Demolished 2012-2013.