US Bridges

Hirst Brault Exp. over Chain Bridge Rd. RTE3547

Fair

Fairfax County, Virginia · 02.12FR66/OO.22TO123 · Structure no. 000000000006503

Built
1983
42 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
15,648
2022 count
Owner
State
State Highway Agency

About this bridge

Hirst Brault Exp. over Chain Bridge Rd. RTE3547 is a concrete continuous slab carrying Hirst Brault Exp. over Chain Bridge Rd. RTE3547 in Fairfax County, Virginia. It was built in 1983, so it is 42 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 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 15,648 vehicles a day, projected to reach 17,448 by 2042. The structure is 120 ft (36.6 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHirst Brault Exp.
CrossesChain Bridge Rd. RTE3547
Location02.12FR66/OO.22TO123
RouteState Highway 267
CountyFairfax County
StateVirginia
Coordinates38.92729, -77.20024
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span68 ft (20.7 m)
Deck width70 ft (21.3 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,648 (2022)
Projected traffic17,448 by 2042
Trucks0%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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$25 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hirst Brault Exp. over Chain Bridge Rd. RTE3547 built?

It was built in 1983, making it 42 years old in 2025.

What condition is Hirst Brault Exp. over Chain Bridge Rd. RTE3547 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 March 2024.

How much traffic does Hirst Brault Exp. over Chain Bridge Rd. RTE3547 carry?

About 15,648 vehicles per day (2022 count).

How long is Hirst Brault Exp. over Chain Bridge Rd. RTE3547?

The structure is 120 ft (36.6 m) long with a longest span of 68 ft (20.7 m) and a deck 70 ft wide.

Who owns Hirst Brault Exp. over Chain Bridge Rd. RTE3547?

It is owned by the State Highway Agency.