US Bridges

Chainbridge Road over I-66

Good

Fairfax County, Virginia · 00.70FR50 00.60TO655 · Structure no. 000000000030947

Built
2020
5 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
423 ft
3 main spans
Daily traffic
19,095
2022 count
Owner
State
State Highway Agency

About this bridge

Chainbridge Road over I-66 is a concrete stringer/multi-beam or girder carrying Chainbridge Road over I-66 in Fairfax County, Virginia. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 19,095 vehicles a day, projected to reach 21,291 by 2045. The structure is 423 ft (128.9 m) long and 153 ft wide.

Location

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CarriesChainbridge Road
CrossesI-66
Location00.70FR50 00.60TO655
RouteState Highway 123
CountyFairfax County
StateVirginia
Coordinates38.86839, -77.30823
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.1 US tons
Inventory rating66.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length423 ft (128.9 m)
Longest span148 ft (45.1 m)
Deck width153 ft (46.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic19,095 (2022)
Projected traffic21,291 by 2045
Trucks0%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Chainbridge Road over I-66 built?

It was built in 2020, making it 5 years old in 2025.

What condition is Chainbridge Road over I-66 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 May 2023.

How much traffic does Chainbridge Road over I-66 carry?

About 19,095 vehicles per day (2022 count).

How long is Chainbridge Road over I-66?

The structure is 423 ft (128.9 m) long with a longest span of 148 ft (45.1 m) and a deck 153 ft wide.

Who owns Chainbridge Road over I-66?

It is owned by the State Highway Agency.