Md 410 over Rock Creek
FairMontgomery County, Maryland · 0.55 Mile East of Md 186 · Structure no. 100000150059010
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 200 ft
- 3 main spans
- Daily traffic
- 20,224
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Md 410 over Rock Creek is a steel continuous stringer/multi-beam or girder carrying Md 410 over Rock Creek in Montgomery County, Maryland. It was built in 1974, so it is 51 years old, younger 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 6 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 20,224 vehicles a day, roughly 8% of them trucks, projected to reach 27,239 by 2044. The structure is 200 ft (61 m) long and 76 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 | 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 410 over Rock Creek built?
It was built in 1974, making it 51 years old in 2025.
What condition is Md 410 over 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 October 2024.
How much traffic does Md 410 over Rock Creek carry?
About 20,224 vehicles per day (2024 count), of which roughly 8% are trucks.
How long is Md 410 over Rock Creek?
The structure is 200 ft (61 m) long with a longest span of 85 ft (25.9 m) and a deck 76 ft wide.
Who owns Md 410 over Rock Creek?
It is owned by the State Highway Agency.