WB DIAAH
Carrying WB DIAAH over HORSEPEN RUN
1.3 MILES FROM DULLES AIR, Loudoun, Virginia
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: WB DIAAH
The WB DIAAH bridge in Loudoun, Virginia carries WB DIAAH over HORSEPEN RUN. It was built in 1960, making it 66 years old today. It was last reconstructed in 1985, extending its service life. The structure is built primarily of steel and spans 3 sections, stretching 41.2 meters (135 feet) end to end. Daily traffic averages 13,000 vehicles, placing it in the heavily-trafficked tier of Virginia bridges. It is owned and maintained by USDOT.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 6/9, substructure at 5/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 31.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How WB DIAAH compares
Live comparison across Virginia.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1960
- Last Reconstructed
- 1985
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 41.2 m (135 ft)
- Deck Width
- 17.3 m (57 ft)
- Owner
- USDOT
- Avg Daily Traffic
- 13,000 vehicles/day
- Structure Number
- 2100003P0000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
How to read this record
This page shows what the last federal inspection recorded, not whether WB DIAAH is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare WB DIAAH against other structures in Loudoun and across Virginia. Virginia bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for WB DIAAH?
WB DIAAH in Loudoun, Virginia has a deck rating of 5/9, superstructure rating of 6/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is WB DIAAH inspected?
WB DIAAH's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 13,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. WB DIAAH is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for WB DIAAH?
WB DIAAH has an NBI inventory load rating of 31.7 metric tons.
Who is responsible for maintaining WB DIAAH?
WB DIAAH is owned and maintained by USDOT.
How old is WB DIAAH and does age affect safety?
WB DIAAH was built in 1960, making it 66 years old and last reconstructed in 1985.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.