Franklin Street Bridge

{{Short description|Bridge in Chicago, Illinois, U.S.}}

{{more citations needed|date=June 2018}}

{{Use mdy dates|date=April 2025}}

{{Use American English|date=January 2025}}

{{Infobox bridge

|bridge_name=Franklin–Orleans Street Bridge

|image=Chicago River Franklin Street Bascule Bridge.jpg

|image_size=

|caption=Franklin Street Bridge in 1987

|official_name=Franklin–Orleans Street Bridge

|carries=Automobiles, Pedestrians

|crosses=Chicago River

|locale=Chicago, Cook County, Illinois

|maint=

|id=

|design=Double-leaf bascule

|mainspan={{Convert|220|ft|m}}

|length={{Convert|320|ft|m sm|sp=us|lk=on}}

|width={{Convert|62|ft|m}}

|clearance=

|below={{Convert|18.7|ft|m|1}}

|builder=Great Lakes Dredge and Dock Company, Ketler–Elliot Company

|traffic=

|open=October 1920

|closed=

|toll=

|map_cue=

|map_image=

|map_text=

|map_width=

|coordinates={{coord|41|53|14|N|87|38|9|W|region:US_type:landmark|display=inline,title}}

|lat=

|long=

}}

File:Franklin Street Bridge, Chicago, opened for sailboats.jpg

The Franklin–Orleans Street Bridge, commonly known as the Franklin Street Bridge, is a bascule bridge over the Chicago River, in Chicago, Illinois, United States. It was built in October 1920, and is located directly southwest of the Merchandise Mart. Connecting the Near North Side with "The Loop," is at the junction of the branches of the river, lying directly west of the Wells Street Bridge. It carries four lanes of traffic in the northbound direction, and sidewalks are available on both sides of the bridge.

Great Lakes Dredge and Dock Company was the contractor for the substructure, and the Ketler–Elliot Company was the contractor for the superstructure. Original electrical equipment was installed by C. H. Norwood. The bridge is an example of a trunnion bascule bridge, with each half of the roadway is cantilevered out from shore abutments. The bridge is extremely efficient to operate.

The bridge provided a new connection to the southern banks of the river and aided in westward expansion along Wacker Drive.