US Bridges

Sully Road over Flat Lick Branch

Fair

Fairfax County, Virginia · 00.37 662 / 01.48 50 · Structure no. 000000000006264

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
48 ft
4 main spans
Daily traffic
92,438
2022 count
Owner
State
State Highway Agency

About this bridge

Sully Road over Flat Lick Branch is a concrete culvert carrying Sully Road over Flat Lick Branch in Fairfax County, Virginia. It was built in 1967, so it is 58 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 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 92,438 vehicles a day, roughly 1% of them trucks, projected to reach 124,751 by 2045. The structure is 48 ft (14.6 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesSully Road
CrossesFlat Lick Branch
Location00.37 662 / 01.48 50
RouteState Highway 28
CountyFairfax County
StateVirginia
Coordinates38.8783, -77.44879
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating66 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic92,438 (2022)
Projected traffic124,751 by 2045
Trucks1%
Lanes on structure8
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$100 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Sully Road over Flat Lick Branch built?

It was built in 1967, making it 58 years old in 2025.

What condition is Sully Road over Flat Lick 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 July 2023.

How much traffic does Sully Road over Flat Lick Branch carry?

About 92,438 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Sully Road over Flat Lick Branch?

The structure is 48 ft (14.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Sully Road over Flat Lick Branch?

It is owned by the State Highway Agency.