Is 81 NB over Potomac River
GoodWashington County, Maryland · On West Virginia Line · Structure no. 100000210078011
- Built
- 1965
- 60 years old, rebuilt 2020
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,184 ft
- 8 main spans
- Daily traffic
- 61,300
- 2011 count
- Owner
- State
- State Highway Agency
About this bridge
Is 81 NB over Potomac River is a steel continuous stringer/multi-beam or girder carrying Is 81 NB over Potomac River in Washington County, Maryland. It was built in 1965 and reconstructed in 2020, so it is 60 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 61,300 vehicles a day, roughly 32% of them trucks, projected to reach 84,375 by 2031. The structure is 1,184 ft (360.9 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
No coordinates are recorded for this structure.
Condition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 81 NB over Potomac River built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2020.
What condition is Is 81 NB over Potomac River 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 May 2023.
How much traffic does Is 81 NB over Potomac River carry?
About 61,300 vehicles per day (2011 count), of which roughly 32% are trucks.
How long is Is 81 NB over Potomac River?
The structure is 1,184 ft (360.9 m) long with a longest span of 190 ft (57.9 m) and a deck 62 ft wide.
Who owns Is 81 NB over Potomac River?
It is owned by the State Highway Agency.