US Bridges

I-81 Nbl over Routes 11 & Wbl 58

Fair

Washington County, Virginia · 2.52 FR 75 6.76 to 737 · Structure no. 000000000018924

Built
1961
64 years old, rebuilt 1988
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
239 ft
4 main spans
Daily traffic
20,902
2022 count
Owner
State
State Highway Agency

About this bridge

I-81 Nbl over Routes 11 & Wbl 58 is a steel stringer/multi-beam or girder carrying I-81 Nbl over Routes 11 & Wbl 58 in Washington County, Virginia. It was built in 1961 and reconstructed in 1988, so it is 64 years old, older than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 20,902 vehicles a day, roughly 22% of them trucks, projected to reach 30,517 by 2042. The structure is 239 ft (72.9 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-81 Nbl
CrossesRoutes 11 & Wbl 58
Location2.52 FR 75 6.76 to 737
RouteInterstate 81
Coordinates36.71346, -81.93431
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating67 US tons
Inventory rating51 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length239 ft (72.9 m)
Longest span74 ft (22.6 m)
Deck width49 ft (14.9 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,902 (2022)
Projected traffic30,517 by 2042
Trucks22%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$156 million (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-81 Nbl over Routes 11 & Wbl 58 built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1988.

What condition is I-81 Nbl over Routes 11 & Wbl 58 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does I-81 Nbl over Routes 11 & Wbl 58 carry?

About 20,902 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is I-81 Nbl over Routes 11 & Wbl 58?

The structure is 239 ft (72.9 m) long with a longest span of 74 ft (22.6 m) and a deck 49 ft wide.

Who owns I-81 Nbl over Routes 11 & Wbl 58?

It is owned by the State Highway Agency.