US Bridges

Sbl Route 0081 over Alleghany DRIVE_(RT642)

Fair

Roanoke County, Virginia · 5.11 Mont Co; 1.72 Rt 112 · Structure no. 000000000014869

Built
1962
63 years old, rebuilt 1985
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
107 ft
3 main spans
Daily traffic
28,030
2022 count
Owner
State
State Highway Agency

About this bridge

Sbl Route 0081 over Alleghany DRIVE_(RT642) is a concrete tee beam carrying Sbl Route 0081 over Alleghany DRIVE_(RT642) in Roanoke County, Virginia. It was built in 1962 and reconstructed in 1985, so it is 63 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 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 28,030 vehicles a day, roughly 1% of them trucks, projected to reach 31,253 by 2042. The structure is 107 ft (32.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSbl Route 0081
CrossesAlleghany DRIVE_(RT642)
Location5.11 Mont Co; 1.72 Rt 112
RouteInterstate 81
Coordinates37.28297, -80.12793
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating43 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length107 ft (32.6 m)
Longest span38 ft (11.6 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,030 (2022)
Projected traffic31,253 by 2042
Trucks1%
Lanes on structure2
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sbl Route 0081 over Alleghany DRIVE_(RT642) built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1985.

What condition is Sbl Route 0081 over Alleghany DRIVE_(RT642) 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 August 2024.

How much traffic does Sbl Route 0081 over Alleghany DRIVE_(RT642) carry?

About 28,030 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Sbl Route 0081 over Alleghany DRIVE_(RT642)?

The structure is 107 ft (32.6 m) long with a longest span of 38 ft (11.6 m) and a deck 44 ft wide.

Who owns Sbl Route 0081 over Alleghany DRIVE_(RT642)?

It is owned by the State Highway Agency.