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I81 over Flat Creek

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

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

I81 over Flat Creek in Hamblen County, Tennessee, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 3 (serious condition) on the 0-9 scale.
It was built in 1970, making it 55 years old at the 2025 inventory.
It carries about 45,697 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 3 of the 119 inventoried bridges in Hamblen County rated poor (2.5%); 3 (2.5%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	3	Serious condition


Structure	Continuous concrete culvert
Length	about 22 ft
Location	4.70M.FROM Jefferson Co.l
NBI structure number	32I00810019
Condition class	Poor

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 East Fork Flat Creek	1971	45,697	Fair
I81 over Turkey Creek	1972	45,697	Fair