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I81 over South Fork Holston River

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

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

I81 over South Fork Holston River in Sullivan 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 1973, making it 52 years old at the 2025 inventory.
It carries about 32,258 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 164 of the 367 inventoried bridges in Sullivan County rated good (44.7%); 10 (2.7%) 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	Continuous steel stringer or multi-beam girder
Length	about 1,023 ft
Location	1 M NE Jct I81&SR36
NBI structure number	82I00810018
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I81 over Nfa B352	1968	53,763	Good
I81 over Nfa B352	1968	53,763	Fair
I26 Rt Ln over Nfa 2640	1969	49,932	Fair
I26 Lt Ln over Nfa 2640	1969	49,932	Fair
I26 Rt Ln over Rock Springs Rd.	1968	41,117	Good
I181 Rt Ln over Rock Springs Rd.	1968	41,117	Good