Is 495X NB over Cabin John Creek
FairMontgomery County, Maryland · 0.11 Mile North of Gv 6 · Structure no. 100000150087010
- Built
- 1963
- 62 years old, rebuilt 1970
- Condition
- Fair
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 272 ft
- 3 main spans
- Daily traffic
- 19,820
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Is 495X NB over Cabin John Creek is a concrete continuous box beam or girders - multiple carrying Is 495X NB over Cabin John Creek in Montgomery County, Maryland. It was built in 1963 and reconstructed in 1970, so it is 62 years old, older than the Maryland average of 52.6 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 19,820 vehicles a day, roughly 8% of them trucks, projected to reach 11,081 by 2026. The structure is 272 ft (82.9 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 495X NB over Cabin John Creek built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1970.
What condition is Is 495X NB over Cabin John Creek 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 July 2024.
How much traffic does Is 495X NB over Cabin John Creek carry?
About 19,820 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Is 495X NB over Cabin John Creek?
The structure is 272 ft (82.9 m) long with a longest span of 107 ft (32.6 m) and a deck 36 ft wide.
Who owns Is 495X NB over Cabin John Creek?
It is owned by the State Highway Agency.