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I-71 over Tr-66 (dyer Rd.)

Madison County, Ohio · rated Good in the 2025 National Bridge Inventory

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

I-71 over Tr-66 (dyer Rd.) in Madison County, Ohio, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 9 (excellent condition) on the 0-9 scale.
It was built in 1964, making it 61 years old at the 2025 inventory.
It carries about 18,136 vehicles a day (traffic count year 2015).
Its listed owner is the state highway agency.
It is one of 132 of the 200 inventoried bridges in Madison County rated good (66.0%); 17 (8.5%) 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

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

Bridge	Built	Vehicles/day	Condition
I-70 over Big Darby Creek	1970	32,533	Good
I-70 over Big Darby Creek	1970	32,533	Good
I-70 over Little Darby Creek	1969	29,528	Good
I-70 over Little Darby Creek	1969	29,528	Good
I-70 over Deer Creek	1969	24,059	Good
I-70 EB over Deer Creek	1969	24,059	Good