US Bridges

Clifton Road over Swift Run

Good

Fairfax County, Virginia · 00.80FR646/00.35TO5529 · Structure no. 000000000027647

Built
2003
22 years old
Condition
Good
inspected August 2023
Type
Arch - Deck
Concrete
Length
23 ft
1 main span
Daily traffic
5,662
2022 count
Owner
State
State Highway Agency

About this bridge

Clifton Road over Swift Run is a concrete arch - deck carrying Clifton Road over Swift Run in Fairfax County, Virginia. It was built in 2003, so it is 22 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 5,662 vehicles a day, roughly 1% of them trucks, projected to reach 6,475 by 2045. The structure is 23 ft (7 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesClifton Road
CrossesSwift Run
Location00.80FR646/00.35TO5529
RouteCounty Highway 645
CountyFairfax County
StateVirginia
Coordinates38.76084, -77.35516
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,662 (2022)
Projected traffic6,475 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$250 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Clifton Road over Swift Run built?

It was built in 2003, making it 22 years old in 2025.

What condition is Clifton Road over Swift Run 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 August 2023.

How much traffic does Clifton Road over Swift Run carry?

About 5,662 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Clifton Road over Swift Run?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 25 ft wide.

Who owns Clifton Road over Swift Run?

It is owned by the State Highway Agency.