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Ill 100 over Chataqua Creek

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

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

Ill 100 over Chataqua Creek in Jersey 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 5 (fair condition) on the 0-9 scale.
It was built in 1964 and reconstructed in 1995, making it 61 years old at the 2025 inventory.
It carries about 3,150 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 43 of the 113 inventoried bridges in Jersey County rated fair (38.1%); 6 (5.3%) 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	Continuous steel stringer or multi-beam girder
Length	about 115 ft
Location	at Chataqua
NBI structure number	042001300000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 67 SB over Piasa Creek	2012	12,100	Good
US 67 NB over Piasa Creek	2012	12,100	Good
US 67 over De Arcy Creek	1921	5,300	Fair
Il 100 (NB) over Piasa Creek	1997	5,150	Fair
Ill 100 (SB) over Piasa Creek	1997	5,150	Good
Ill 100 over Elsah Creek	1961	4,150	Poor