Portland, Maine

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Beach Street Overpass (Cumberland County, Maine)
Stone arch bridge over Abandoned Portland Terminal Company on Beach Street
Open to traffic

Casco Bay Bridge (Cumberland County, Maine)
Built 1993-97
Bascule bridge over Fore River on ME 77 in Portland
Open to traffic

CN - Back Cove Swing Bridge (Cumberland County, Maine)
Abandoned 1967, Wooden trestles burned by arsonists in 1984
Through truss bridge over Back Cove on Abandoned Railroad
Abandoned

Danforth Street Overpass (Cumberland County, Maine)
Built 1939; rehabilitated 2005
Concrete rigid frame bridge over Railroad (ST) on Danforth Street, Portland, Maine
Open to traffic

Deering Oaks Bridge (Cumberland County, Maine)
Stone arch bridge over Deering Oaks Pond on a pedestrian trail in Portland
Open to traffic

Fore River Railroad Bridge (Cumberland County, Maine)
Pony/through girder bridge over Fore River on 2 tracks of railroad traffic
Open to rail traffic

Mackworth Island Causeway (Cumberland County, Maine)
Built 1955; rehabilitated 2015
Causeway with through plate girder (former swing) bridge over Casco Bay on Andrews Avenue
Restricted - weight limit 4 tons, one vehicle at a time, all vehicles subject to inspection

Million Dollar Bridge (Cumberland County, Maine)
Built 1916, replaced in 1993-98
Lost Concrete stringer bridge over Fore River on ME 77 in Portland
Replaced by a new bridge

ST - Park Avenue Overpass (Cumberland County, Maine)
Built 1930
Girder bridge over Park Avenue on Springfield Terminal
Open to traffic

ST - St.John Street Overpass (Cumberland County, Maine)
Built 1900
Double Barrel truss bridge over St John Street on Springfield Terminal Rail System in Portland
Abandoned

Stroudwater River Bridge (Cumberland County, Maine)
Built ca. 1890's by the Berlin Iron Bridge Co., replaced in 1951
Lost Pony truss bridge over Stroudwater River on Spring Street in Portland
Replaced by a new bridge

Stroudwater River Bridge (Cumberland County, Maine)
Built 1983
Deck arch bridge over Stroudwater Rv on Westbrook Street
Open to traffic

Townway-Casco Bay/Atlantic Ocean Bridge (Cumberland County, Maine)
Built 1993
Bridge over Casco Bay/Atlantic Ocean on Town Way
Open to traffic