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Illinois 146 over Dutchman Creek

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

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

Illinois 146 over Dutchman Creek in Johnson County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1973, making it 52 years old at the 2025 inventory.
It carries about 3,100 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 50 of the 118 inventoried bridges in Johnson County rated fair (42.4%); 3 (2.5%) 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	Continuous prestressed concrete stringer or multi-beam girder
Length	about 163 ft
Location	2.3 Mi. W. Vienna
NBI structure number	044005200000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I 24 over Dry Fork Creek	1976	20,700	Fair
I 24 over Mccorkle Creek	1971	20,500	Good
I 24 EB over Tr 42 & L Saline R	1972	10,350	Fair
I 24 WB over Tr 42 & L Saline R	1972	10,350	Fair
I 24 EB over Tr 77 Bowman Bottoms	1971	10,300	Fair
I 24 WB over Tr 77 Bowman Bottoms	1971	10,300	Fair