Md 115 over North Br of Rock Creek
FairMontgomery County, Maryland · 0.29 M E of Grist Mill DR · Structure no. 100000150016010
- Built
- 1917
- 108 years old, rebuilt 1970
- Condition
- Fair
- inspected May 2024
- Type
- Arch - Deck
- Concrete
- Length
- 34 ft
- 1 main span
- Daily traffic
- 16,981
- 2013 count
- Owner
- State
- State Highway Agency
About this bridge
Md 115 over North Br of Rock Creek is a concrete arch - deck carrying Md 115 over North Br of Rock Creek in Montgomery County, Maryland. It was built in 1917 and reconstructed in 1970, so it is 108 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 16,981 vehicles a day, roughly 8% of them trucks, projected to reach 21,803 by 2026. The structure is 34 ft (10.5 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Md 115 over North Br of Rock Creek built?
It was built in 1917, making it 108 years old in 2025. It was reconstructed in 1970.
What condition is Md 115 over North Br of Rock 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 May 2024.
How much traffic does Md 115 over North Br of Rock Creek carry?
About 16,981 vehicles per day (2013 count), of which roughly 8% are trucks.
How long is Md 115 over North Br of Rock Creek?
The structure is 34 ft (10.5 m) long with a longest span of 30 ft (9.1 m) and a deck 47 ft wide.
Who owns Md 115 over North Br of Rock Creek?
It is owned by the State Highway Agency.