US Bridges

I-81 Sbl over Red Bud Run

Fair

Frederick County, Virginia · 1.59 to 7 - 0.76 to 11 · Structure no. 000000000008134

Built
1965
60 years old
Condition
Fair
inspected March 2025
Type
Culvert
Concrete
Length
43 ft
4 main spans
Daily traffic
29,488
2022 count
Owner
State
State Highway Agency

About this bridge

I-81 Sbl over Red Bud Run is a concrete culvert carrying I-81 Sbl over Red Bud Run in Frederick County, Virginia. It was built in 1965, so it is 60 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 29,488 vehicles a day, roughly 1% of them trucks, projected to reach 41,745 by 2045. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-81 Sbl
CrossesRed Bud Run
Location1.59 to 7 - 0.76 to 11
RouteInterstate 81
Coordinates39.20687, -78.13616
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating98 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 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
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-81 Sbl over Red Bud Run built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-81 Sbl over Red Bud Run 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 Sbl over Red Bud Run carry?

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

How long is I-81 Sbl over Red Bud Run?

The structure is 43 ft (13.1 m) long with a longest span of 10 ft (3 m).

Who owns I-81 Sbl over Red Bud Run?

It is owned by the State Highway Agency.