Is 370 & Ramp 9 over Csx/Marc
GoodMontgomery County, Maryland · 0.56 Mile East of Md 355 · Structure no. 100000150151013
- Built
- 1989
- 36 years old, rebuilt 2010
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 150 ft
- 2 main spans
- Daily traffic
- 87,390
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Is 370 & Ramp 9 over Csx/Marc is a steel continuous stringer/multi-beam or girder carrying Is 370 & Ramp 9 over Csx/Marc in Montgomery County, Maryland. It was built in 1989 and reconstructed in 2010, so it is 36 years old, younger than the Maryland average of 52.6 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 87,390 vehicles a day, roughly 5% of them trucks, projected to reach 132,220 by 2045. The structure is 150 ft (45.7 m) long and 154 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 370 & Ramp 9 over Csx/Marc built?
It was built in 1989, making it 36 years old in 2025. It was reconstructed in 2010.
What condition is Is 370 & Ramp 9 over Csx/Marc in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.
How much traffic does Is 370 & Ramp 9 over Csx/Marc carry?
About 87,390 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Is 370 & Ramp 9 over Csx/Marc?
The structure is 150 ft (45.7 m) long with a longest span of 85 ft (25.9 m) and a deck 154 ft wide.
Who owns Is 370 & Ramp 9 over Csx/Marc?
It is owned by the State Highway Agency.