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Ch 23 over Trib Macoupin Creek

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

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

Ch 23 over Trib Macoupin Creek in Montgomery County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1984, making it 41 years old at the 2025 inventory.
It carries about 75 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 116 of the 261 inventoried bridges in Montgomery County rated fair (44.4%); 10 (3.8%) 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 55 ft
Location	4 Mi SW Waggoner
NBI structure number	068327200000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-55 over Horse Creek	1972	31,350	Fair
I-55 and FRs over Horse Creek	1950	29,350	Fair
FAI 55 and FRs over Shop Creek Trib	1942	26,800	Fair
I-55 and FRs over Shop Creek	1943	26,800	Fair
I-55 over Three Mile Branch	1973	26,500	Fair
I-55 (NB) over Macoupin Creek	1972	14,400	Fair