South Shannon Rout over Middle Creek

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

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

• South Shannon Rout over Middle Creek in Carroll 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 1986, making it 39 years old at the 2025 inventory.
• It carries about 500 vehicles a day (traffic count year 2021).
• Its listed owner is the county highway agency.
• It is one of 96 of the 180 inventoried bridges in Carroll County rated fair (53.3%); 26 (14.4%) 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 → (42.03924, -89.7439)

Component ratings

Bridge details

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

Busiest bridges in Carroll County

All bridges nearby: Carroll County, IL bridge conditions · every bridge in Carroll County · Illinois bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.