US Bridges

Sbl RTE 81 over NS Rwy; Den Hill RD/641

Good

Montgomery County, Virginia · 9.62-ROANOKE CO;2.37-RT11 · Structure no. 000000000029534

Built
2012
13 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
201 ft
2 main spans
Daily traffic
25,907
2022 count
Owner
State
State Highway Agency

About this bridge

Sbl RTE 81 over NS Rwy; Den Hill RD/641 is a steel continuous stringer/multi-beam or girder carrying Sbl RTE 81 over NS Rwy; Den Hill RD/641 in Montgomery County, Virginia. It was built in 2012, so it is 13 years old, younger than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25,907 vehicles a day, roughly 1% of them trucks, projected to reach 28,886 by 2042. The structure is 201 ft (61.3 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSbl RTE 81
CrossesNS Rwy; Den Hill RD/641
Location9.62-ROANOKE CO;2.37-RT11
RouteInterstate 81
Coordinates37.1575, -80.32396
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating51 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length201 ft (61.3 m)
Longest span108 ft (32.9 m)
Deck width79 ft (24.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,907 (2022)
Projected traffic28,886 by 2042
Trucks1%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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 RTE 81 over NS Rwy; Den Hill RD/641 built?

It was built in 2012, making it 13 years old in 2025.

What condition is Sbl RTE 81 over NS Rwy; Den Hill RD/641 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Sbl RTE 81 over NS Rwy; Den Hill RD/641 carry?

About 25,907 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Sbl RTE 81 over NS Rwy; Den Hill RD/641?

The structure is 201 ft (61.3 m) long with a longest span of 108 ft (32.9 m) and a deck 79 ft wide.

Who owns Sbl RTE 81 over NS Rwy; Den Hill RD/641?

It is owned by the State Highway Agency.