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Lee Road over I-39 & US 51

Lee County, Illinois · rated Good in the 2025 National Bridge Inventory

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

Lee Road over I-39 & US 51 in Lee County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1982, making it 43 years old at the 2025 inventory.
It carries about 75 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 147 of the 373 inventoried bridges in Lee County rated good (39.4%); 42 (11.3%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete stringer or multi-beam girder
Length	about 257 ft
Location	2 Mi N of US 30
NBI structure number	052005100000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 52 & Il 2 & Il over Rock River	2002	22,100	Fair
I 39&US 51 over Steward Creek Branch	1984	19,500	Fair
I 39&US 51 over Dry Run Creek	1982	19,100	Fair
I 39&US 51 over Stream	1984	19,100	Fair
I 39&US 51 over Harmon Creek South	1982	19,100	Fair
I 39&US 51 over Willow Creek	1983	18,700	Fair