I 93 /US1/ST3 over Comb MBTA & Columbia RD
FairSuffolk County, Massachusetts · 2 MI S of JCT I90 · Structure no. B162593ECDOTNBI
- Built
- 1958
- 67 years old, rebuilt 1984
- Condition
- Fair
- inspected October 2022
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 1,531 ft
- 23 main spans
- Daily traffic
- 193,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 93 /US1/ST3 over Comb MBTA & Columbia RD is a steel stringer/multi-beam or girder carrying I 93 /US1/ST3 over Comb MBTA & Columbia RD in Suffolk County, Massachusetts. It was built in 1958 and reconstructed in 1984, so it is 67 years old, older 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 193,500 vehicles a day, roughly 7% of them trucks, projected to reach 290,591 by 2031. The structure is 1,531 ft (466.6 m) long and 111 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 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 /US1/ST3 over Comb MBTA & Columbia RD built?
It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1984.
What condition is I 93 /US1/ST3 over Comb MBTA & Columbia RD 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 October 2022.
How much traffic does I 93 /US1/ST3 over Comb MBTA & Columbia RD carry?
About 193,500 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is I 93 /US1/ST3 over Comb MBTA & Columbia RD?
The structure is 1,531 ft (466.6 m) long with a longest span of 84 ft (25.6 m) and a deck 111 ft wide.
Who owns I 93 /US1/ST3 over Comb MBTA & Columbia RD?
It is owned by the State Highway Agency.