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US 20 & Private Rd over Silver Creek Trib

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

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

US 20 & Private Rd over Silver Creek Trib 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 culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1959 and reconstructed in 1986, making it 66 years old at the 2025 inventory.
It carries about 12,700 vehicles a day (traffic count year 2023).
Its listed owner is the state 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition

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
Il 26 over Yellow Creek	1988	12,600	Fair
Ill 26 (fap 316) over Pecatonica River	1983	12,500	Fair