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Nfa A166 over Overflow

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

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

Nfa A166 over Overflow in Madison County, Tennessee, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1994, making it 31 years old at the 2025 inventory.
It carries about 60 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 134 of the 418 inventoried bridges in Madison County rated good (32.1%); 17 (4.1%) 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 single box beam
Length	about 60 ft
Location	1.4 Mi W Jct SR1&SR152
NBI structure number	570A1660003
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I40 299209Y over Ic RR & Dyer Creek	2022	54,117	Fair
I40 299399E over Icg RR	2022	54,117	Fair
I40 over SR 5	2019	53,881	Good
I40 over Overflow	1960	49,487	Fair
I40 over Overflow	1960	49,487	Fair
I40 over So. Fork Forked Deer Riv	1960	49,487	Fair