Structure 17464 · Smyth County, VA

Interstate 81 Sbl over Kiawana Road

Carries Interstate 81 Sbl over Kiawana Road, 1.5 Fr R622 -2.55 To R683.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

111 ft end to end, longest span 39 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.

Built1963rebuilt 1987
Length110.9 ft33.8 m
Daily traffic15,284counted 2022
Last inspectedJanuary 2024every 24 months

Location

StateVirginia
CountySmyth
Location1.5 Fr R622 -2.55 To R683
CarriesInterstate 81 Sbl
CrossesKiawana Road
Coordinates36.86876, -81.40904

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length110.9 ft (33.8 m)
Max Span39.0 ft (11.9 m)
Deck Width44.0 ft (13.4 m)
Deck Area452.9 sq m
Main Spans3
Year Built1963 (reconstructed 1987)

Traffic

Avg Daily Traffic15,284 (2022)
Truck Traffic1%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000017464

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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