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21ST St over Addison CR

Cook County, Illinois · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

21ST St over Addison CR in Cook County, Illinois, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 2 (critical condition) on the 0-9 scale.
It was built in 1974, making it 51 years old at the 2025 inventory.
It carries about 900 vehicles a day (traffic count year 2022).
Its listed owner is a city or municipal highway agency.
It is one of 246 of the 1,722 inventoried bridges in Cook County rated poor (14.3%); 246 (14.3%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 82 ft
Location	0.22MI.W. of 17TH Av
NBI structure number	016665000000000
Condition class	Poor

Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.

Bridge	Built	Vehicles/day	Condition
I- 90 94 Dan Ryan over Sanitary Sewer	1961	312,400	Fair
I- 80 94 Kingery over Bikeway Ave (RR Ave)	2004	254,100	Fair
I- 90 94 Ryan Elev over 15TH to 16TH Sts	1962	247,500	Fair
I- 90 94 Ryan Elev over 16TH to 18TH Sts	1962	247,500	Fair
I- 90 94 Ryan Elev over Canal to Stewart Sts	1962	245,500	Poor
I- 90 94 Elev Exp over Stewart Ave to 28 Pl	1962	245,500	Fair