I 495 NB over RR Pan Am
PoorMiddlesex County, Massachusetts · 0.25 MI S of ST-38 · Structure no. L150862JPDOTNBI
- Built
- 1961
- 64 years old
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 176 ft
- 3 main spans
- Daily traffic
- 64,233
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
I 495 NB over RR Pan Am is a steel stringer/multi-beam or girder carrying I 495 NB over RR Pan Am in Middlesex County, Massachusetts. It was built in 1961, so it is 64 years old, older than the Massachusetts average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, would be posted or closed except for temporary shoring.
It carries about 64,233 vehicles a day, roughly 6% of them trucks, projected to reach 210,047 by 2032. The structure is 176 ft (53.6 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 495 NB over RR Pan Am built?
It was built in 1961, making it 64 years old in 2025.
What condition is I 495 NB over RR Pan Am in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.
How much traffic does I 495 NB over RR Pan Am carry?
About 64,233 vehicles per day (2018 count), of which roughly 6% are trucks.
How long is I 495 NB over RR Pan Am?
The structure is 176 ft (53.6 m) long with a longest span of 58 ft (17.7 m) and a deck 57 ft wide.
Who owns I 495 NB over RR Pan Am?
It is owned by the State Highway Agency.