US Bridges

Frontage Route 310 over I-81 / US-58

Good

Washington County, Virginia · .04M TOF021 & .12M to 11 · Structure no. 000000000018848

Built
1963
62 years old, rebuilt 2018
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
266 ft
5 main spans
Daily traffic
6,131
2022 count
Owner
State
State Highway Agency

About this bridge

Frontage Route 310 over I-81 / US-58 is a steel continuous stringer/multi-beam or girder carrying Frontage Route 310 over I-81 / US-58 in Washington County, Virginia. It was built in 1963 and reconstructed in 2018, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,131 vehicles a day, projected to reach 8,951 by 2042. The structure is 266 ft (81.1 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFrontage Route 310
CrossesI-81 / US-58
Location.04M TOF021 & .12M to 11
RouteInterstate 0F310
Coordinates36.65073, -82.08356
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating94 US tons
Inventory rating72 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length266 ft (81.1 m)
Longest span63 ft (19.2 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,131 (2022)
Projected traffic8,951 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Frontage Route 310 over I-81 / US-58 built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2018.

What condition is Frontage Route 310 over I-81 / US-58 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Frontage Route 310 over I-81 / US-58 carry?

About 6,131 vehicles per day (2022 count).

How long is Frontage Route 310 over I-81 / US-58?

The structure is 266 ft (81.1 m) long with a longest span of 63 ft (19.2 m) and a deck 33 ft wide.

Who owns Frontage Route 310 over I-81 / US-58?

It is owned by the State Highway Agency.