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I-81 Nbl & Sbl over Rte 11 Nsrr Mfh River

Smyth County, Virginia · rated Good in the 2025 National Bridge Inventory

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

I-81 Nbl & Sbl over Rte 11 Nsrr Mfh River in Smyth County, Virginia, 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 2021, making it 4 years old at the 2025 inventory.
It carries about 31,084 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 31 of the 189 inventoried bridges in Smyth County rated good (16.4%); 7 (3.7%) 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 410 ft
Location	5.21TO R11 & 1.84 to R683
NBI structure number	000000000031136
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
N&sbl Route 0081 over Laurel Spring Branch	1963	33,381	Fair
Interstate 81 over Nbl&sbl over Stream	1963	31,442	Fair
Interstate 81 over Staley Creek	1962	30,390	Fair
Interstate 81 over N&sbl O Hutton Branch	1963	29,356	Fair
Route 81 over Nbl&sbl over Stream	1964	27,803	Fair
Interstate 81 Sbl over Rte. 691 (johnston Road)	1963	18,000	Fair