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Historic Bridges: Scott County, Iowa

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.

Total Bridges Found: 4

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Centennial Bridge
Rock Island Centennial Bridge
HSRNational HSR. Local HSR.
Click to visit page.
US-67 Over Mississippi River and Various Streets and Railroads in Davenport and Rock Island: Scott County, Iowa and Rock Island County, Illinois, United States
Metal Tied Solid Ribbed Through Arch, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed
Length: 3,853 ft. Main Span: 538 ft. Roadway: 46 ft. Main Spans: 5
Built 1940 By: American Bridge Company of New York, New York and Ash, Howard, Needles, and Tammen of New York, New York
The first tied arch bridge over the Mississippi, the multiple arch spans make this a unique landmark bridge.
Government Bridge
Arsenal Bridge
HSRNational HSR. Local HSR.
Click to visit page.
Fort Armstrong Avenue (2nd Street) and Railroad () Over Mississippi River and Various Streets and Railroads in Davenport and Rock Island: Scott County, Iowa and Rock Island County, Illinois, United States
Metal 16 Panel Pin-Connected Baltimore Through Truss, Movable: Swing (Rim Bearing Center Pier) and Approach Spans: Metal 12 Panel Pin-Connected Baltimore Through Truss, Fixed
Length: 1,848 ft. Main Span: 366 ft. Roadway: 25.3 ft. Main Spans: 1
Built 1896 By: Phoenix Bridge Company of Phoenixville, Pennsylvania and Ralph Modjeski
This unusual army-owned double-deck bridge was the first large bridge designed by famous bridge engineer Ralph Modjeski.
X
I-74 Bridges
Iowa-Illinois Memorial Bridge
HSRNational HSR. Local HSR.
Click to visit page.
I-74 Over Mississippi River in Bettendorf and Moline: Scott County, Iowa and Rock Island County, Illinois, United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Continuous Rivet-Connected Warren Pony Truss, Fixed
Length: 5,018 ft. Main Span: 740 ft. Roadway: 23.3 ft. Main Spans: 3
Built 1935 By: McClintic-Marshall Company of Pittsburgh, Pennsylvania and Modjeski and Masters (Ralph Modjeski)
One built in 1935 and one built in 1960, this unique pair of amazingly identical suspension bridges also has an impressive continuous pony truss approach system.
Lock and Dam Number 15
Access Bridge
HSRNational HSR. Local HSR.
Click to visit page.
Dam Access Road Over Mississippi River in Davenport and Rock Island: Scott County, Iowa and Rock Island County, Illinois, United States
Metal 11 Panel Rivet-Connected K-Truss Deck Truss, Fixed
Length: 1,270 ft. Main Span: 116 ft. Roadway: 17 ft. Main Spans: 11
Built 1934 By: American Bridge Company of New York, New York
This dam is notable to bridge enthusiasts for its bridge structure consisting of a rare K-truss design.

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