ST 1 A/Sb over Other Relief
FairSuffolk County, Massachusetts · .48 KM N E of Calln Tun · Structure no. B162355JKDOTNBI
- Built
- 1951
- 74 years old, rebuilt 2005
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 36 ft
- 1 main span
- Daily traffic
- 43,178
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
ST 1 A/Sb over Other Relief is a steel stringer/multi-beam or girder carrying ST 1 A/Sb over Other Relief in Suffolk County, Massachusetts. It was built in 1951 and reconstructed in 2005, so it is 74 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 6 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 43,178 vehicles a day, roughly 4% of them trucks, projected to reach 33,007 by 2031. The structure is 36 ft (10.9 m) long and 46 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was ST 1 A/Sb over Other Relief built?
It was built in 1951, making it 74 years old in 2025. It was reconstructed in 2005.
What condition is ST 1 A/Sb over Other Relief 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 ST 1 A/Sb over Other Relief carry?
About 43,178 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is ST 1 A/Sb over Other Relief?
The structure is 36 ft (10.9 m) long with a longest span of 32 ft (9.9 m) and a deck 46 ft wide.
Who owns ST 1 A/Sb over Other Relief?
It is owned by the State Highway Agency.