Md 117 over Great Seneca Creek
FairMontgomery County, Maryland · 1.82 Miles East of Md 118 · Structure no. 100000150093010
- Built
- 1951
- 74 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 108 ft
- 3 main spans
- Daily traffic
- 18,752
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Md 117 over Great Seneca Creek is a steel continuous stringer/multi-beam or girder carrying Md 117 over Great Seneca Creek in Montgomery County, Maryland. It was built in 1951, so it is 74 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 18,752 vehicles a day, roughly 8% of them trucks, projected to reach 21,633 by 2026. The structure is 108 ft (32.9 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Md 117 over Great Seneca Creek built?
It was built in 1951, making it 74 years old in 2025.
What condition is Md 117 over Great Seneca 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 April 2023.
How much traffic does Md 117 over Great Seneca Creek carry?
About 18,752 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Md 117 over Great Seneca Creek?
The structure is 108 ft (32.9 m) long with a longest span of 40 ft (12.2 m) and a deck 32 ft wide.
Who owns Md 117 over Great Seneca Creek?
It is owned by the State Highway Agency.