US Bridges

Gambrill Road over Fairfax Co. Pkwy.

Fair

Fairfax County, Virginia · 00.28FR6997/00.01TO0000 · Structure no. 000000000023473

Built
1992
33 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
132 ft
1 main span
Daily traffic
4,861
2022 count
Owner
State
State Highway Agency

About this bridge

Gambrill Road over Fairfax Co. Pkwy. is a steel stringer/multi-beam or girder carrying Gambrill Road over Fairfax Co. Pkwy. in Fairfax County, Virginia. It was built in 1992, so it is 33 years old, younger 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 4,861 vehicles a day, roughly 1% of them trucks, projected to reach 5,420 by 2042. The structure is 132 ft (40.2 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGambrill Road
CrossesFairfax Co. Pkwy.
Location00.28FR6997/00.01TO0000
RouteCounty Highway 640
CountyFairfax County
StateVirginia
Coordinates38.75702, -77.23323
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.4 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length132 ft (40.2 m)
Longest span130 ft (39.6 m)
Deck width64 ft (19.4 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,861 (2022)
Projected traffic5,420 by 2042
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$210 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Gambrill Road over Fairfax Co. Pkwy. built?

It was built in 1992, making it 33 years old in 2025.

What condition is Gambrill Road over Fairfax Co. Pkwy. 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 October 2024.

How much traffic does Gambrill Road over Fairfax Co. Pkwy. carry?

About 4,861 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Gambrill Road over Fairfax Co. Pkwy.?

The structure is 132 ft (40.2 m) long with a longest span of 130 ft (39.6 m) and a deck 64 ft wide.

Who owns Gambrill Road over Fairfax Co. Pkwy.?

It is owned by the State Highway Agency.