Is 270 over Monocacy River
FairFrederick County, Maryland · 1.32 Mile South of Md 85 · Structure no. 100000100075010
- Built
- 1950
- 75 years old, rebuilt 1983
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 507 ft
- 3 main spans
- Daily traffic
- 80,340
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Is 270 over Monocacy River is a steel continuous stringer/multi-beam or girder carrying Is 270 over Monocacy River in Frederick County, Maryland. It was built in 1950 and reconstructed in 1983, so it is 75 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 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 80,340 vehicles a day, roughly 8% of them trucks, projected to reach 83,959 by 2026. The structure is 507 ft (154.5 m) long and 93 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 270 over Monocacy River built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1983.
What condition is Is 270 over Monocacy River 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 February 2023.
How much traffic does Is 270 over Monocacy River carry?
About 80,340 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Is 270 over Monocacy River?
The structure is 507 ft (154.5 m) long with a longest span of 140 ft (42.7 m) and a deck 93 ft wide.
Who owns Is 270 over Monocacy River?
It is owned by the State Highway Agency.