US Bridges

Frontage Road over Flatlick Branch

Fair

Fairfax County, Virginia · 00.37FR645/00.10TO2515 · Structure no. 000000000025216

Built
1998
27 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
75 ft
1 main span
Daily traffic
1,331
2009 count
Owner
State
State Highway Agency

About this bridge

Frontage Road over Flatlick Branch is a steel stringer/multi-beam or girder carrying Frontage Road over Flatlick Branch in Fairfax County, Virginia. It was built in 1998, so it is 27 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 1,331 vehicles a day, projected to reach 1,571 by 2045. The structure is 75 ft (22.9 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesFrontage Road
CrossesFlatlick Branch
Location00.37FR645/00.10TO2515
CountyFairfax County
StateVirginia
Coordinates38.88947, -77.41992
Functional classUrban Local

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 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 alignment8: Equal to present desirable criteria
Operating rating96.8 US tons
Inventory rating74.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span70 ft (21.3 m)
Deck width40 ft (12.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,331 (2009)
Projected traffic1,571 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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$159 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Frontage Road over Flatlick Branch built?

It was built in 1998, making it 27 years old in 2025.

What condition is Frontage Road over Flatlick 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 April 2023.

How much traffic does Frontage Road over Flatlick Branch carry?

About 1,331 vehicles per day (2009 count).

How long is Frontage Road over Flatlick Branch?

The structure is 75 ft (22.9 m) long with a longest span of 70 ft (21.3 m) and a deck 40 ft wide.

Who owns Frontage Road over Flatlick Branch?

It is owned by the State Highway Agency.