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TR-173 (Scott Rd) over Malgren Drain

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

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

TR-173 (Scott Rd) over Malgren Drain in Kane 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 4 (poor condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 175 vehicles a day (traffic count year 2023).
Its listed owner is a town or township highway agency.
It is one of 24 of the 339 inventoried bridges in Kane County rated poor (7.1%); 24 (7.1%) 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 34 ft
Location	1.5 Mi NW Big Rock
NBI structure number	045311100000000
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
I-88 WB over Fox R - RR - Il 25	1958	86,200	Fair
I-88 EB over Fox R - RR - Il 25	2008	86,200	Fair
I-90 over S Br Kishwaukee Riv	2014	76,200	Good
I-90 over Stream	1958	58,700	Good
I-90 over Sleepy Hollow Rd	2014	52,600	Good
I-90 over Sleepy Hollow Rd	2014	52,600	Good