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Tr 70A over Williams Creek

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

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

Tr 70A over Williams Creek in Washington County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 400 vehicles a day (traffic count year 2024).
Its listed owner is a town or township highway agency.
It is one of 104 of the 234 inventoried bridges in Washington County rated fair (44.4%); 14 (6.0%) 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	5.5 Mi S of Okawvill
NBI structure number	095313200000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Fai 64 EB over Kaskaskia River	1971	15,500	Fair
Fai 64 WB over Kaskaskia River	1971	15,500	Fair
Fai 64 EB over Kaskaskia R Overflow	1969	15,500	Good
Fai 64 WB over Kaskaskia R Overflow	1969	15,500	Good
Fai 64 WB over Plum Creek	1969	15,500	Fair
Fai 64 EB over Plum Creek	1969	15,500	Fair