US Bridges

I-81 Sbl over Route 11

Fair

Frederick County, Virginia · 2.34 to 7 - 3.60 to 672 · Structure no. 000000000008121

Built
1964
61 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
213 ft
4 main spans
Daily traffic
29,488
2022 count
Owner
State
State Highway Agency

About this bridge

I-81 Sbl over Route 11 is a steel stringer/multi-beam or girder carrying I-81 Sbl over Route 11 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 29,488 vehicles a day, roughly 1% of them trucks, projected to reach 41,745 by 2045. The structure is 213 ft (64.9 m) long and 37 ft wide.

Location

Open in Google Maps
CarriesI-81 Sbl
CrossesRoute 11
Location2.34 to 7 - 3.60 to 672
RouteInterstate 81
CountyFrederick County
StateVirginia
Coordinates39.21691, -78.13799
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating58 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length213 ft (64.9 m)
Longest span66 ft (20.1 m)
Deck width37 ft (11.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,488 (2022)
Projected traffic41,745 by 2045
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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$172 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-81 Sbl over Route 11 built?

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

What condition is I-81 Sbl over Route 11 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 November 2023.

How much traffic does I-81 Sbl over Route 11 carry?

About 29,488 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is I-81 Sbl over Route 11?

The structure is 213 ft (64.9 m) long with a longest span of 66 ft (20.1 m) and a deck 37 ft wide.

Who owns I-81 Sbl over Route 11?

It is owned by the State Highway Agency.