Structure 20448 · Rockingham County, VA

I-81 Sbl over Blacks Run

Carries I-81 Sbl over Blacks Run, 1.17 To 11 - 1.45 To 253.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT132 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

132 ft end to end, longest span 53 ft. Lengths and the semi-truck 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 multi-beam bridge.

Built195967 years old
Length131.9 ft40.2 m
Daily traffic28,820counted 2022
Last inspectedAugust 2023every 24 months

Location

StateVirginia
CountyRockingham
Location1.17 To 11 - 1.45 To 253
CarriesI-81 Sbl
CrossesBlacks Run
Coordinates38.41268, -78.89109

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length131.9 ft (40.2 m)
Max Span53.1 ft (16.2 m)
Deck Width44.0 ft (13.4 m)
Deck Area538.7 sq m
Main Spans3
Year Built1959

Traffic

Avg Daily Traffic28,820 (2022)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000020448

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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