ST 3 SB over US 3 SB Connector
GoodMiddlesex County, Massachusetts · 0.25 MI Sly Nh Line · Structure no. T09022854DOTNBI
- Built
- 2004
- 21 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 137 ft
- 1 main span
- Daily traffic
- 42,200
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
ST 3 SB over US 3 SB Connector is a steel stringer/multi-beam or girder carrying ST 3 SB over US 3 SB Connector in Middlesex County, Massachusetts. It was built in 2004, so it is 21 years old, younger than the Massachusetts average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 42,200 vehicles a day, roughly 10% of them trucks, projected to reach 67,910 by 2032. The structure is 137 ft (41.9 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was ST 3 SB over US 3 SB Connector built?
It was built in 2004, making it 21 years old in 2025.
What condition is ST 3 SB over US 3 SB Connector in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.
How much traffic does ST 3 SB over US 3 SB Connector carry?
About 42,200 vehicles per day (2018 count), of which roughly 10% are trucks.
How long is ST 3 SB over US 3 SB Connector?
The structure is 137 ft (41.9 m) long with a longest span of 132 ft (40.3 m) and a deck 79 ft wide.
Who owns ST 3 SB over US 3 SB Connector?
It is owned by the State Highway Agency.