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Lyndon Road over French Creek

Whiteside County, Illinois · rated Fair in the 2025 National Bridge Inventory

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

Lyndon Road over French Creek in Whiteside County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 2002, making it 23 years old at the 2025 inventory.
It carries about 800 vehicles a day (traffic count year 2021).
Its listed owner is the county highway agency.
It is one of 201 of the 278 inventoried bridges in Whiteside County rated fair (72.3%); 23 (8.3%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 62 ft
Location	0.7 Mi N Jct US 30
NBI structure number	098307400000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Il 40 over Rock River	2012	19,800	Good
I-88 over Ditch	1975	13,100	Good
Fai 88 over Stream	1975	12,600	Fair
I-88 over Ditch	1975	12,500	Good
I-88 over Ditch	1975	12,500	Good
Il 40 Locust St over Stream	1987	11,100	Good