US 3 SB over ST110 Chelmsford ST
FairMiddlesex County, Massachusetts · 0.8 KM N of I 495 · Structure no. C08001ACMDOTNBI
- Built
- 2004
- 21 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 99 ft
- 1 main span
- Daily traffic
- 42,155
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
US 3 SB over ST110 Chelmsford ST is a steel stringer/multi-beam or girder carrying US 3 SB over ST110 Chelmsford ST 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 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 42,155 vehicles a day, roughly 5% of them trucks, projected to reach 52,117 by 2032. The structure is 99 ft (30.1 m) long and 75 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 SB over ST110 Chelmsford ST built?
It was built in 2004, making it 21 years old in 2025.
What condition is US 3 SB over ST110 Chelmsford ST 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 May 2023.
How much traffic does US 3 SB over ST110 Chelmsford ST carry?
About 42,155 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is US 3 SB over ST110 Chelmsford ST?
The structure is 99 ft (30.1 m) long with a longest span of 93 ft (28.4 m) and a deck 75 ft wide.
Who owns US 3 SB over ST110 Chelmsford ST?
It is owned by the State Highway Agency.