US Bridges

I-81 Nbl over CSX Transportation

Fair

Frederick County, Virginia · 1.89 to 7 - 0.41 to 11 · Structure no. 000000000008115

Built
1964
61 years old
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
33,000
2023 count
Owner
State
State Highway Agency

About this bridge

I-81 Nbl over CSX Transportation is a prestressed concrete stringer/multi-beam or girder carrying I-81 Nbl over CSX Transportation in Frederick County, Virginia. It was built in 1964, so it is 61 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 33,000 vehicles a day, roughly 22% of them trucks, projected to reach 42,010 by 2042. The structure is 133 ft (40.5 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-81 Nbl
CrossesCSX Transportation
Location1.89 to 7 - 0.41 to 11
RouteInterstate 81
CountyFrederick County
StateVirginia
Coordinates39.21088, -78.13625
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2025
Inspection intervalevery 19 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 alignment7: Better than present minimum criteria
Operating rating100.3 US tons
Inventory rating72 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length133 ft (40.5 m)
Longest span44 ft (13.3 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,000 (2023)
Projected traffic42,010 by 2042
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 I-81 Nbl over CSX Transportation built?

It was built in 1964, making it 61 years old in 2025.

What condition is I-81 Nbl over CSX Transportation 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 March 2025.

How much traffic does I-81 Nbl over CSX Transportation carry?

About 33,000 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is I-81 Nbl over CSX Transportation?

The structure is 133 ft (40.5 m) long with a longest span of 44 ft (13.3 m) and a deck 44 ft wide.

Who owns I-81 Nbl over CSX Transportation?

It is owned by the State Highway Agency.