US Bridges

Interstate 381 Sbl over I-381N Ramp 1A & I-81/58

Fair

Washington County, Virginia · 0.05 to 81;1.1 Towcl-Bris · Structure no. 000000000020049

Built
1987
38 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
477 ft
4 main spans
Daily traffic
5,707
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 381 Sbl over I-381N Ramp 1A & I-81/58 is a steel continuous stringer/multi-beam or girder carrying Interstate 381 Sbl over I-381N Ramp 1A & I-81/58 in Washington County, Virginia. It was built in 1987, so it is 38 years old, younger 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 6 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 5,707 vehicles a day, projected to reach 6,363 by 2042. The structure is 477 ft (145.4 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesInterstate 381 Sbl
CrossesI-381N Ramp 1A & I-81/58
Location0.05 to 81;1.1 Towcl-Bris
RouteInterstate 381
CountyWashington County
StateVirginia
Coordinates36.62378, -82.18122
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating89.9 US tons
Inventory rating69 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length477 ft (145.4 m)
Longest span125 ft (38.1 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,707 (2022)
Projected traffic6,363 by 2042
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 381 Sbl over I-381N Ramp 1A & I-81/58 built?

It was built in 1987, making it 38 years old in 2025.

What condition is Interstate 381 Sbl over I-381N Ramp 1A & I-81/58 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 July 2024.

How much traffic does Interstate 381 Sbl over I-381N Ramp 1A & I-81/58 carry?

About 5,707 vehicles per day (2022 count).

How long is Interstate 381 Sbl over I-381N Ramp 1A & I-81/58?

The structure is 477 ft (145.4 m) long with a longest span of 125 ft (38.1 m) and a deck 44 ft wide.

Who owns Interstate 381 Sbl over I-381N Ramp 1A & I-81/58?

It is owned by the State Highway Agency.