US Bridges

I81 Nbl over Rte. 460

Fair

Montgomery County, Virginia · 3.09-RT8; 1.00-RT11/460 · Structure no. 000000000025419

Built
2001
24 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
184 ft
2 main spans
Daily traffic
25,621
2022 count
Owner
State
State Highway Agency

About this bridge

I81 Nbl over Rte. 460 is a prestressed concrete continuous stringer/multi-beam or girder carrying I81 Nbl over Rte. 460 in Montgomery County, Virginia. It was built in 2001, so it is 24 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 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 25,621 vehicles a day, roughly 1% of them trucks, projected to reach 35,494 by 2045. The structure is 184 ft (56.1 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesI81 Nbl
CrossesRte. 460
Location3.09-RT8; 1.00-RT11/460
RouteInterstate 81
CountyMontgomery County
StateVirginia
Coordinates37.12891, -80.37045
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating64 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length184 ft (56.1 m)
Longest span92 ft (28 m)
Deck width62 ft (19 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,621 (2022)
Projected traffic35,494 by 2045
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 I81 Nbl over Rte. 460 built?

It was built in 2001, making it 24 years old in 2025.

What condition is I81 Nbl over Rte. 460 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 April 2023.

How much traffic does I81 Nbl over Rte. 460 carry?

About 25,621 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is I81 Nbl over Rte. 460?

The structure is 184 ft (56.1 m) long with a longest span of 92 ft (28 m) and a deck 62 ft wide.

Who owns I81 Nbl over Rte. 460?

It is owned by the State Highway Agency.