I 93 NB B16-NB4 over I 93 Sb&cmbrg&mbta/Bmrr
FairSuffolk County, Massachusetts · 1.1 MI N of JCT I93&US1 · Structure no. B162813E3DOTNBI
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 1,233 ft
- 10 main spans
- Daily traffic
- 76,000
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
I 93 NB B16-NB4 over I 93 Sb&cmbrg&mbta/Bmrr is a steel stringer/multi-beam or girder carrying I 93 NB B16-NB4 over I 93 Sb&cmbrg&mbta/Bmrr in Suffolk County, Massachusetts. It was built in 1970, so it is 55 years old, younger than the Massachusetts average of 63.8 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 76,000 vehicles a day, roughly 8% of them trucks, projected to reach 132,977 by 2032. The structure is 1,233 ft (375.8 m) long and 71 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 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 93 NB B16-NB4 over I 93 Sb&cmbrg&mbta/Bmrr built?
It was built in 1970, making it 55 years old in 2025.
What condition is I 93 NB B16-NB4 over I 93 Sb&cmbrg&mbta/Bmrr 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 November 2024.
How much traffic does I 93 NB B16-NB4 over I 93 Sb&cmbrg&mbta/Bmrr carry?
About 76,000 vehicles per day (2018 count), of which roughly 8% are trucks.
How long is I 93 NB B16-NB4 over I 93 Sb&cmbrg&mbta/Bmrr?
The structure is 1,233 ft (375.8 m) long with a longest span of 212 ft (64.6 m) and a deck 71 ft wide.
Who owns I 93 NB B16-NB4 over I 93 Sb&cmbrg&mbta/Bmrr?
It is owned by the State Highway Agency.