Md 355 over Great Seneca Creek
GoodMontgomery County, Maryland · 1.32 Miles N of Md 124 · Structure no. 100000150055010
- Built
- 1999
- 26 years old
- Condition
- Good
- inspected April 2024
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 288 ft
- 3 main spans
- Daily traffic
- 31,050
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Md 355 over Great Seneca Creek is a steel continuous girder and floorbeam system carrying Md 355 over Great Seneca Creek in Montgomery County, Maryland. It was built in 1999, so it is 26 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 31,050 vehicles a day, roughly 4% of them trucks, projected to reach 37,138 by 2026. The structure is 288 ft (87.8 m) long and 112 ft wide. If it were closed, the detour would be 6.2 mi (10 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. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Md 355 over Great Seneca Creek built?
It was built in 1999, making it 26 years old in 2025.
What condition is Md 355 over Great Seneca Creek 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 April 2024.
How much traffic does Md 355 over Great Seneca Creek carry?
About 31,050 vehicles per day (2009 count), of which roughly 4% are trucks.
How long is Md 355 over Great Seneca Creek?
The structure is 288 ft (87.8 m) long with a longest span of 110 ft (33.5 m) and a deck 112 ft wide.
Who owns Md 355 over Great Seneca Creek?
It is owned by the State Highway Agency.