US Bridges

21st. Street over Route I-66

Fair

Arlington County, Virginia · 00.15FR29/00.04TON.CT Hse · Structure no. 000000000000043

Built
1980
45 years old, rebuilt 2024
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
226 ft
2 main spans
Daily traffic
5,877
2022 count
Owner
State
State Highway Agency

About this bridge

21st. Street over Route I-66 is a steel stringer/multi-beam or girder carrying 21st. Street over Route I-66 in Arlington County, Virginia. It was built in 1980 and reconstructed in 2024, so it is 45 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 5,877 vehicles a day, roughly 1% of them trucks, projected to reach 6,553 by 2045. The structure is 226 ft (68.8 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries21st. Street
CrossesRoute I-66
Location00.15FR29/00.04TON.CT Hse
RouteCounty Highway 0
CountyArlington County
StateVirginia
Coordinates38.89732, -77.08564
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating75.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length226 ft (68.8 m)
Longest span127 ft (38.7 m)
Deck width48 ft (14.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,877 (2022)
Projected traffic6,553 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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$210 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was 21st. Street over Route I-66 built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2024.

What condition is 21st. Street over Route I-66 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 September 2024.

How much traffic does 21st. Street over Route I-66 carry?

About 5,877 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is 21st. Street over Route I-66?

The structure is 226 ft (68.8 m) long with a longest span of 127 ft (38.7 m) and a deck 48 ft wide.

Who owns 21st. Street over Route I-66?

It is owned by the State Highway Agency.