US Bridges

I-81 Nbl & Ramp over Trib Poague Run

Fair

Rockbridge County, Virginia · 8.07 to 60 & 0.07 to 11 · Structure no. 000000000015325

Built
1964
61 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
21 ft
3 main spans
Daily traffic
430
2022 count
Owner
State
State Highway Agency

About this bridge

I-81 Nbl & Ramp over Trib Poague Run is a concrete culvert carrying I-81 Nbl & Ramp over Trib Poague Run in Rockbridge 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 430 vehicles a day, roughly 16% of them trucks, projected to reach 629 by 2042. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-81 Nbl & Ramp
CrossesTrib Poague Run
Location8.07 to 60 & 0.07 to 11
RouteInterstate 81
CountyRockbridge County
StateVirginia
Coordinates37.66968, -79.50525
Functional classRural 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than 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 spans3
Design loadHS 20
Structure length21 ft (6.3 m)
Longest span6 ft (1.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic430 (2022)
Projected traffic629 by 2042
Trucks16%
Lanes on structure3
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$75 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-81 Nbl & Ramp over Trib Poague Run built?

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

What condition is I-81 Nbl & Ramp over Trib Poague 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 May 2024.

How much traffic does I-81 Nbl & Ramp over Trib Poague Run carry?

About 430 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is I-81 Nbl & Ramp over Trib Poague Run?

The structure is 21 ft (6.3 m) long with a longest span of 6 ft (1.9 m).

Who owns I-81 Nbl & Ramp over Trib Poague Run?

It is owned by the State Highway Agency.