WB Diaah over Difficult Run
FairFairfax County, Virginia · 9.0 Miles from Dulles Air · Structure no. 2100013P0000000
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 201 ft
- 3 main spans
- Daily traffic
- 13,000
- 2024 count
- Owner
- Federal
- Metropolitan Washington Airports Service
About this bridge
WB Diaah over Difficult Run is a steel stringer/multi-beam or girder carrying WB Diaah over Difficult Run in Fairfax County, Virginia. It was built in 1963, so it is 62 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 6 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 13,000 vehicles a day, roughly 12% of them trucks, projected to reach 14,300 by 2044. The structure is 201 ft (61.4 m) long and 44 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was WB Diaah over Difficult Run built?
It was built in 1963, making it 62 years old in 2025.
What condition is WB Diaah over Difficult Run 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 WB Diaah over Difficult Run carry?
About 13,000 vehicles per day (2024 count), of which roughly 12% are trucks.
How long is WB Diaah over Difficult Run?
The structure is 201 ft (61.4 m) long with a longest span of 78 ft (23.9 m) and a deck 44 ft wide.
Who owns WB Diaah over Difficult Run?
It is owned by the Metropolitan Washington Airports Service.