Ch 4 (fas 537) over Trenkle Slough

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

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

• Ch 4 (fas 537) over Trenkle Slough in De Witt 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 5 (fair condition) on the 0-9 scale.
• It was built in 1968, making it 57 years old at the 2025 inventory.
• It carries about 1,200 vehicles a day (traffic count year 2022).
• Its listed owner is the county highway agency.
• It is one of 74 of the 192 inventoried bridges in De Witt County rated fair (38.5%); 11 (5.7%) 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.

View this bridge on a map → (40.23265, -88.6414)

Component ratings

Bridge details

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

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