Is 70 over Blackrock Creek
GoodWashington County, Maryland · 0.66 Mile East of Md 66 · Structure no. 100000210133020
- Built
- 1968
- 57 years old
- Condition
- Good
- inspected October 2023
- Type
- Culvert
- Concrete
- Length
- 350 ft
- Daily traffic
- 58,600
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Is 70 over Blackrock Creek is a concrete culvert carrying Is 70 over Blackrock Creek in Washington County, Maryland. It was built in 1968, so it is 57 years old, older 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 58,600 vehicles a day, roughly 8% of them trucks, projected to reach 75,360 by 2026. The structure is 350 ft (106.7 m) long. If it were closed, the detour would be 9.9 mi (16 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 70 over Blackrock Creek built?
It was built in 1968, making it 57 years old in 2025.
What condition is Is 70 over Blackrock 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 October 2023.
How much traffic does Is 70 over Blackrock Creek carry?
About 58,600 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Is 70 over Blackrock Creek?
The structure is 350 ft (106.7 m) long with a longest span of 10 ft (3 m).
Who owns Is 70 over Blackrock Creek?
It is owned by the State Highway Agency.