Structure 17474 · Smyth County, VA

Interstate 81(nbl) over Route 683

Carries Interstate 81(nbl) over Route 683, 7.05 To R11 & 2.61 Wythe.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT119 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

119 ft end to end, longest span 47 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a tee-beam bridge.

Built1964rebuilt 1982
Length118.8 ft36.2 m
Daily traffic14,146counted 2022
Last inspectedMarch 2024every 24 months

Location

StateVirginia
CountySmyth
Location7.05 To R11 & 2.61 Wythe
CarriesInterstate 81(nbl)
CrossesRoute 683
Coordinates36.88828, -81.37157

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length118.8 ft (36.2 m)
Max Span46.9 ft (14.3 m)
Deck Width44.0 ft (13.4 m)
Deck Area485.1 sq m
Main Spans3
Year Built1964 (reconstructed 1982)

Traffic

Avg Daily Traffic14,146 (2022)
Truck Traffic1%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000017474

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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