US Bridges

Interstate 81 Nbl over Matson DR & Hooks Branch

Fair

Smyth County, Virginia · 10.18 FR 107; 0.20 to 16 · Structure no. 000000000020622

Built
1963
62 years old, rebuilt 1985
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
219 ft
3 main spans
Daily traffic
17,343
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 81 Nbl over Matson DR & Hooks Branch is a steel stringer/multi-beam or girder carrying Interstate 81 Nbl over Matson DR & Hooks Branch in Smyth County, Virginia. It was built in 1963 and reconstructed in 1985, so it is 62 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 17,343 vehicles a day, roughly 1% of them trucks, projected to reach 19,337 by 2045. The structure is 219 ft (66.7 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 81 Nbl
CrossesMatson DR & Hooks Branch
Location10.18 FR 107; 0.20 to 16
RouteInterstate 81
Coordinates36.82428, -81.51035
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.1 US tons
Inventory rating49.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length219 ft (66.7 m)
Longest span72 ft (21.9 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,343 (2022)
Projected traffic19,337 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
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$620.1 million (2019 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 81 Nbl over Matson DR & Hooks Branch built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1985.

What condition is Interstate 81 Nbl over Matson DR & Hooks Branch 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 2023.

How much traffic does Interstate 81 Nbl over Matson DR & Hooks Branch carry?

About 17,343 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Interstate 81 Nbl over Matson DR & Hooks Branch?

The structure is 219 ft (66.7 m) long with a longest span of 72 ft (21.9 m) and a deck 37 ft wide.

Who owns Interstate 81 Nbl over Matson DR & Hooks Branch?

It is owned by the State Highway Agency.