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Nfa A446 over Upper Bent Creek

Hamblen County, Tennessee · rated Fair in the 2025 National Bridge Inventory

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

Nfa A446 over Upper Bent Creek in Hamblen County, Tennessee, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1987, making it 38 years old at the 2025 inventory.
It carries about 160 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 97 of the 119 inventoried bridges in Hamblen County rated fair (81.5%); 3 (2.5%) 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 51 ft
Location	2MI South of SR34
NBI structure number	320A4460001
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I81 730393A over Southern Railway	1967	49,004	Fair
I81 730393A over Southern Railway	1967	49,004	Fair
I81 over Sinking Fork Creek	1964	49,004	Fair
Ramp SR32 to I81SB over SR-32 Ramp/norf So RR	2013	49,004	Good
I81 over Flat Creek	1970	45,697	Poor
I81 over East Fork Flat Creek	1971	45,697	Fair