US Bridges

Aviation Drive over Diaah

Fair

Loudoun County, Virginia · 0.9 Miles to Dulles Airpo · Structure no. 2100002P0000000

Built
1961
64 years old, rebuilt 2003
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
236 ft
4 main spans
Daily traffic
10,000
2024 count
Owner
Federal
Metropolitan Washington Airports Service

About this bridge

Aviation Drive over Diaah is a steel stringer/multi-beam or girder carrying Aviation Drive over Diaah in Loudoun County, Virginia. It was built in 1961 and reconstructed in 2003, so it is 64 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 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 10,000 vehicles a day, projected to reach 12,000 by 2044. The structure is 236 ft (71.8 m) long and 86 ft wide.

Location

Open in Google Maps
CarriesAviation Drive
CrossesDiaah
Location0.9 Miles to Dulles Airpo
CountyLoudoun County
StateVirginia
Coordinates38.95814, -77.44414
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length236 ft (71.8 m)
Longest span84 ft (25.6 m)
Deck width86 ft (26.2 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2024)
Projected traffic12,000 by 2044
Trucks0%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerMetropolitan Washington Airports Service
Maintained byMetropolitan Washington Airports Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.3 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Aviation Drive over Diaah built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2003.

What condition is Aviation Drive over Diaah 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 February 2024.

How much traffic does Aviation Drive over Diaah carry?

About 10,000 vehicles per day (2024 count).

How long is Aviation Drive over Diaah?

The structure is 236 ft (71.8 m) long with a longest span of 84 ft (25.6 m) and a deck 86 ft wide.

Who owns Aviation Drive over Diaah?

It is owned by the Metropolitan Washington Airports Service.