US Bridges

I-495 Main Line over Backlick Road RTE.617

Good

Fairfax County, Virginia · 002.17FR620/00.67TO I-95 · Structure no. 000000000025813

Built
2002
23 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
106 ft
1 main span
Daily traffic
102,082
2022 count
Owner
State
State Highway Agency

About this bridge

I-495 Main Line over Backlick Road RTE.617 is a steel stringer/multi-beam or girder carrying I-495 Main Line over Backlick Road RTE.617 in Fairfax County, Virginia. It was built in 2002, so it is 23 years old, younger 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 102,082 vehicles a day, roughly 1% of them trucks, projected to reach 119,485 by 2045. The structure is 106 ft (32.3 m) long and 159 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesI-495 Main Line
CrossesBacklick Road RTE.617
Location002.17FR620/00.67TO I-95
RouteInterstate 495
CountyFairfax County
StateVirginia
Coordinates38.79506, -77.1859
Functional classUrban Principal Arterial - Interstate

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.8 US tons
Inventory rating69.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span106 ft (32.3 m)
Deck width159 ft (48.5 m)
Roadway width152 ft (46.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102,082 (2022)
Projected traffic119,485 by 2045
Trucks1%
Lanes on structure9
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed13 mi (21 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 proposedReplacement because of relocation of road
Estimated improvement cost$180.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-495 Main Line over Backlick Road RTE.617 built?

It was built in 2002, making it 23 years old in 2025.

What condition is I-495 Main Line over Backlick Road RTE.617 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 October 2023.

How much traffic does I-495 Main Line over Backlick Road RTE.617 carry?

About 102,082 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is I-495 Main Line over Backlick Road RTE.617?

The structure is 106 ft (32.3 m) long with a longest span of 106 ft (32.3 m) and a deck 159 ft wide.

Who owns I-495 Main Line over Backlick Road RTE.617?

It is owned by the State Highway Agency.