US Bridges

Shirley Mem. Hwy. over Back Lick Run

Fair

Fairfax County, Virginia · 00.05FR495/01.06TO648 · Structure no. 000000000006546

Built
1961
64 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
204,783
2022 count
Owner
State
State Highway Agency

About this bridge

Shirley Mem. Hwy. over Back Lick Run is a concrete culvert carrying Shirley Mem. Hwy. over Back Lick Run in Fairfax County, Virginia. It was built in 1961, so it is 64 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 204,783 vehicles a day, roughly 1% of them trucks, projected to reach 228,333 by 2045. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesShirley Mem. Hwy.
CrossesBack Lick Run
Location00.05FR495/01.06TO648
RouteInterstate 395
CountyFairfax County
StateVirginia
Coordinates38.79091, -77.17484
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 23 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic204,783 (2022)
Projected traffic228,333 by 2045
Trucks1%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$75 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Shirley Mem. Hwy. over Back Lick Run built?

It was built in 1961, making it 64 years old in 2025.

What condition is Shirley Mem. Hwy. over Back Lick 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 July 2023.

How much traffic does Shirley Mem. Hwy. over Back Lick Run carry?

About 204,783 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Shirley Mem. Hwy. over Back Lick Run?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Shirley Mem. Hwy. over Back Lick Run?

It is owned by the State Highway Agency.