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I-81SBL over Rte 630 & Mason Creek

Roanoke County, Virginia · rated Fair in the 2025 National Bridge Inventory

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

I-81SBL over Rte 630 & Mason Creek in Roanoke County, Virginia, 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 1997, making it 28 years old at the 2025 inventory.
It carries about 34,754 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 124 of the 207 inventoried bridges in Roanoke County rated fair (59.9%); 1 (0.5%) 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


Structure	Continuous steel stringer or multi-beam girder
Length	about 345 ft
Location	3.90-rt112; 0.39-rt419
NBI structure number	000000000024925
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Route 0581 over Walker Avenue	1966	73,663	Fair
Route 581 over Routes 11; 116 & 221	1968	73,663	Fair
Routes 581 & 220 over RTEs 11; 116 & 460	1965	73,429	Fair
Route 0581 over Tazewell Avenue	1968	67,101	Fair
Route 0581 over Kimball Avenue	1968	67,101	Fair
Roy Webber EXP/220 over Wonju Steet	1977	62,286	Fair