US 3 NB over ST 40 Groton RD
FairMiddlesex County, Massachusetts · RTE 3 at RTE 40 · Structure no. C0804785VDOTNBI
- Built
- 2004
- 21 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 136 ft
- 1 main span
- Daily traffic
- 51,585
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
US 3 NB over ST 40 Groton RD is a steel stringer/multi-beam or girder carrying US 3 NB over ST 40 Groton RD 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 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 51,585 vehicles a day, roughly 10% of them trucks, projected to reach 72,174 by 2032. The structure is 136 ft (41.4 m) long and 99 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 3 NB over ST 40 Groton RD built?
It was built in 2004, making it 21 years old in 2025.
What condition is US 3 NB over ST 40 Groton 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 April 2023.
How much traffic does US 3 NB over ST 40 Groton RD carry?
About 51,585 vehicles per day (2017 count), of which roughly 10% are trucks.
How long is US 3 NB over ST 40 Groton RD?
The structure is 136 ft (41.4 m) long with a longest span of 128 ft (38.9 m) and a deck 99 ft wide.
Who owns US 3 NB over ST 40 Groton RD?
It is owned by the State Highway Agency.