US 340 over Catoctin Creek
FairFrederick County, Maryland · 0.63 Mile East of Md 180 · Structure no. 100000100112010
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 414 ft
- 5 main spans
- Daily traffic
- 28,982
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US 340 over Catoctin Creek is a steel continuous stringer/multi-beam or girder carrying US 340 over Catoctin Creek in Frederick County, Maryland. It was built in 1961, so it is 64 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 28,982 vehicles a day, roughly 8% of them trucks, projected to reach 35,676 by 2026. The structure is 414 ft (126.2 m) long and 68 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 US 340 over Catoctin Creek built?
It was built in 1961, making it 64 years old in 2025.
What condition is US 340 over Catoctin 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 September 2024.
How much traffic does US 340 over Catoctin Creek carry?
About 28,982 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is US 340 over Catoctin Creek?
The structure is 414 ft (126.2 m) long with a longest span of 88 ft (26.8 m) and a deck 68 ft wide.
Who owns US 340 over Catoctin Creek?
It is owned by the State Highway Agency.