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Tr 66A over unnamed stream

Clark County, Illinois · rated Good in the 2025 National Bridge Inventory

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

Tr 66A over unnamed stream in Clark County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2019, making it 6 years old at the 2025 inventory.
It carries about 75 vehicles a day (traffic count year 2021).
Its listed owner is a town or township highway agency.
It is one of 143 of the 231 inventoried bridges in Clark County rated good (61.9%); 9 (3.9%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 38 ft
Location	4.3 Mi. NE of Casey
NBI structure number	012334300000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-70 over E Mill Creek Trib	1969	23,400	Fair
I-70 over E Mill Creek	1969	23,400	Fair
I-70 over E Mill Creek	1969	23,400	Fair
I-70 over Kettering Branch	1968	23,400	Fair
Fai 70 over Ditch	1971	23,400	Fair
I-70 over Stream	1968	22,800	Good