US Bridges

I-81 Nbl over RTE 642 & Dry Run

Fair

Shenandoah County, Virginia · 3.41 to 42 - 4.73 to 651 · Structure no. 000000000017021

Built
1966
59 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
148 ft
2 main spans
Daily traffic
23,066
2022 count
Owner
State
State Highway Agency

About this bridge

I-81 Nbl over RTE 642 & Dry Run is a steel stringer/multi-beam or girder carrying I-81 Nbl over RTE 642 & Dry Run in Shenandoah County, Virginia. It was built in 1966, so it is 59 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 23,066 vehicles a day, roughly 1% of them trucks, projected to reach 31,046 by 2045. The structure is 148 ft (45.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-81 Nbl
CrossesRTE 642 & Dry Run
Location3.41 to 42 - 4.73 to 651
RouteInterstate 81
CountyShenandoah County
StateVirginia
Coordinates38.91372, -78.49497
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length148 ft (45.1 m)
Longest span74 ft (22.6 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,066 (2022)
Projected traffic31,046 by 2045
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$116 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-81 Nbl over RTE 642 & Dry Run built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-81 Nbl over RTE 642 & Dry 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 February 2023.

How much traffic does I-81 Nbl over RTE 642 & Dry Run carry?

About 23,066 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is I-81 Nbl over RTE 642 & Dry Run?

The structure is 148 ft (45.1 m) long with a longest span of 74 ft (22.6 m) and a deck 44 ft wide.

Who owns I-81 Nbl over RTE 642 & Dry Run?

It is owned by the State Highway Agency.