Md 191 over Is 495 & Thomas Branch
FairMontgomery County, Maryland · 1.9 Miles North of Md 190 · Structure no. 100000150111010
- Built
- 1962
- 63 years old, rebuilt 1971
- Condition
- Fair
- inspected January 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 343 ft
- 3 main spans
- Daily traffic
- 10,370
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Md 191 over Is 495 & Thomas Branch is a steel stringer/multi-beam or girder carrying Md 191 over Is 495 & Thomas Branch in Montgomery County, Maryland. It was built in 1962 and reconstructed in 1971, so it is 63 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 10,370 vehicles a day, roughly 8% of them trucks, projected to reach 13,156 by 2026. The structure is 343 ft (104.5 m) long and 63 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Md 191 over Is 495 & Thomas Branch built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1971.
What condition is Md 191 over Is 495 & Thomas Branch 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 January 2023.
How much traffic does Md 191 over Is 495 & Thomas Branch carry?
About 10,370 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Md 191 over Is 495 & Thomas Branch?
The structure is 343 ft (104.5 m) long with a longest span of 108 ft (32.9 m) and a deck 63 ft wide.
Who owns Md 191 over Is 495 & Thomas Branch?
It is owned by the State Highway Agency.