Quincy, Illinois

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24th Street Bridge (Adams County, Illinois)
Built 1936
Concrete bridge over Cedar Creek on IL 96 (24th Street) in Quincy
Demolished

BNSF - Bonansinga Drive Overpass (Adams County, Illinois)
Deck plate girder bridge over Bonansinga Drive on BNSF Railway
Open to traffic

BNSF - Cedar Street Overpass (Adams County, Illinois)
Built 1928 Using Older Substructures
Slab bridge over Cedar Street on BNSF Railway
Open to traffic

BNSF - Quincy Bay Bridge (Adams County, Illinois)
Built 1960
Deck Plate girder bridge over Quincy Bay on the BNSF Railway in Quincy
Open to railroad traffic

BNSF - Quincy Railroad Bridge (Adams County, Illinois)
Built 1960
Through truss bridge over the Mississippi River on BNSF Railway at Quincy
Open to railroad traffic

CBQ - Lower Quincy Bay Bridge (Adams County, Illinois)
Built 1889; Removed 1960-1
Lost Pratt deck truss swing bridge over Quincy Bay on Chicago, Burlington & Quincy Railroad
Removed; One pier used as foundation for the "Pier Restaurant"

CBQ - North 12th Street (Adams County, Illinois)
Lost CBQ Rwy bridge over N 12st
Replaced by a new bridge

CBQ - Quincy Bay Bridge (Oldest) (Adams County, Illinois)
Built 1868; Approached replaced by DPGs 1886; Replaced 1899
Lost Bollman deck truss bridge over Quincy Bay on Chicago, Burlington & Quincy
Replaced by a new bridge

CBQ - Quincy Railroad Bridge (Old) (Adams County, Illinois)
Built 1899; Wagon decks removed 1930; Replaced 1961
Warren through truss swing bridge over Mississippi River on Chicago, Burlington & Quincy & Highway (Until 1930)
Replaced by a new bridge

CBQ - Quincy Railroad Bridge (Oldest) (Adams County, Illinois)
Built 1866; Replaced 1898
Lost Whipple through truss bridge over Mississippi River on Chicago, Burlington & Quincy Railroad
Replaced by a new bridge

Cedar Creek Bridge (Adams County, Illinois)
Built 1875
Lost Through truss bridge over Cedar Creek
No longer exists

Curtis Creek Bridge (Adams County, Illinois)
Built 1899; rehabilitated 1995
Stone arch bridge over Curtis Creek on South 8th Street in Quincy
Open to two-lane traffic

Illinois Veterans Home / Sunset Cemetery Bridge (Adams County, Illinois)
Warren pony truss bridge over Cedar Creek
Open to traffic

Quincy Bayview Bridge (Adams County, Illinois)
Built 1986 at a cost of $17,230,000
Cable-stayed bridge over the Mississippi River on westbound US 24 at Quincy
Open to two lanes of westbound traffic

Quincy Memorial Bridge (Adams County, Illinois)
Built 1928-1930; rehabilitated 1981
Continuous through truss bridge over the Mississippi River on eastbound US 24 at Quincy
Open to two lanes of eastbound traffic

Quinsippi Island Bridge (Adams County, Illinois)
Built 1899 using 1867 Arches; Replaced on a new alignment 1961; Used by Narrow Gauge tourist trains until 1984, Coverted to road used after 1984; Repaired 2015-16
Plate girder swing bridge over Quincy Bay providing access to Quinsippi Island Park in Quincy
Open