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Nfa B322 over Rock Springs Branch

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

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

Nfa B322 over Rock Springs Branch in Sullivan 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1975, making it 50 years old at the 2025 inventory.
It carries about 225 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 193 of the 367 inventoried bridges in Sullivan County rated fair (52.6%); 10 (2.7%) 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 22 ft
Location	N of Sr137-se of Kingspor
NBI structure number	820B3220001
Condition class	Fair

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