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Waldo County
| Name | Location | Status | Design | Year Built | Year Lost | Span Length (ft.) | Total Length (ft.) |
|---|
| Ducktrap River Bridge | US 1 over Ducktrap River | Replaced by new bridge | Concrete tee beam | 1932 | 2000 | 59.1 | 158.1 |
| Marsh Stream Railroad Bridge | Bangor & Aroostook Railroad over Marsh Stream | | Girder | 1905 | -- | -- | 335.0 |
| Memorial Bridge | Searsport Avenue over Pedestrian trail (former Route 1) | Open to traffic | Steel stringer | 1921 | -- | 55.0 | 1030.0 |
| Penobscot River Bridge | US Hwy 1 & 3 over Penobscot River | Open to traffic | Cable-stayed | 2006 | -- | 1161.1 | 2120.2 |
| Waldo-Hancock Bridge | Former US 1 (ME 3) over Penobscot River | Demolished, despite not being in the way of anything. | Wire suspension | 1931 | 2013 | 799.9 | 2042.1 |