I 495 NB over Water Assabet River
PoorMiddlesex County, Massachusetts · Mm 65.4 · Structure no. H2501627FDOTNBI
- Built
- 1963
- 62 years old
- Condition
- Poor
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 85 ft
- 1 main span
- Daily traffic
- 55,989
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 495 NB over Water Assabet River is a steel stringer/multi-beam or girder carrying I 495 NB over Water Assabet River in Middlesex County, Massachusetts. It was built in 1963, so it is 62 years old, younger 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.
It carries about 55,989 vehicles a day, roughly 6% of them trucks, projected to reach 78,965 by 2032. The structure is 85 ft (25.9 m) long and 56 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 | 4 Poor | Advanced section loss, deterioration, 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 | 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 Water Assabet River built?
It was built in 1963, making it 62 years old in 2025.
What condition is I 495 NB over Water Assabet River 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 July 2023.
How much traffic does I 495 NB over Water Assabet River carry?
About 55,989 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is I 495 NB over Water Assabet River?
The structure is 85 ft (25.9 m) long with a longest span of 78 ft (23.8 m) and a deck 56 ft wide.
Who owns I 495 NB over Water Assabet River?
It is owned by the State Highway Agency.