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I81 over Sinking Fork Creek

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

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

I81 over Sinking Fork 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 culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1964, making it 61 years old at the 2025 inventory.
It carries about 49,004 vehicles a day (traffic count year 2021).
Its listed owner is the state 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition


Structure	Continuous concrete culvert
Length	about 20 ft
Location	Jefferson Co Line
NBI structure number	32I00810039
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
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
I81 over Turkey Creek	1972	45,697	Fair