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Old Mill Road over Muddy Creek

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

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

Old Mill Road over Muddy Creek in Stephenson 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 1989, making it 36 years old at the 2025 inventory.
It carries about 50 vehicles a day (traffic count year 2014).
Its listed owner is a town or township highway agency.
It is one of 126 of the 340 inventoried bridges in Stephenson County rated fair (37.1%); 11 (3.2%) 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 54 ft
Location	.5 Mi N of Mcconnell
NBI structure number	089325900000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 20 EB over Sumner Creek	1959	12,700	Fair
US 20 WB over Wickham Creek	1983	12,700	Fair
US 20WB over Sumner Creek	1994	12,700	Good
US 20 EB over Wickham Creek	1999	12,700	Fair
US 20 & Private Rd over Silver Creek Trib	1959	12,700	Fair
Il 26 over Yellow Creek	1988	12,600	Fair