HWY Viaduct ST over HWY Northern Ave
FairSuffolk County, Massachusetts · At World Trade Center · Structure no. B161974X5MPANBI
- Built
- 1915
- 110 years old
- Condition
- Fair
- inspected November 2023
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 113 ft
- 2 main spans
- Daily traffic
- 700
- 1997 count
- Owner
- State
- Other State Agency
About this bridge
HWY Viaduct ST over HWY Northern Ave is a steel continuous girder and floorbeam system carrying HWY Viaduct ST over HWY Northern Ave in Suffolk County, Massachusetts. It was built in 1915, so it is 110 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 700 vehicles a day, roughly 8% of them trucks, projected to reach 1,106 by 2030. The structure is 113 ft (34.5 m) long and 61 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 | 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 HWY Viaduct ST over HWY Northern Ave built?
It was built in 1915, making it 110 years old in 2025.
What condition is HWY Viaduct ST over HWY Northern Ave 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 2023.
How much traffic does HWY Viaduct ST over HWY Northern Ave carry?
About 700 vehicles per day (1997 count), of which roughly 8% are trucks.
How long is HWY Viaduct ST over HWY Northern Ave?
The structure is 113 ft (34.5 m) long with a longest span of 52 ft (15.8 m) and a deck 61 ft wide.
Who owns HWY Viaduct ST over HWY Northern Ave?
It is owned by the Other State Agency.