HWY Bridge ST over Water Merrimack River
FairPosted for loadMiddlesex County, Massachusetts · 0.25 MI W Falls & Rt 110 · Structure no. L150192FTDOTNBI
- Built
- 1937
- 88 years old
- Condition
- Fair
- inspected May 2024
- Type
- Truss - Thru
- Steel Continuous
- Length
- 474 ft
- 3 main spans
- Daily traffic
- 18,230
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
HWY Bridge ST over Water Merrimack River is a steel continuous truss - thru carrying HWY Bridge ST over Water Merrimack River in Middlesex County, Massachusetts. It was built in 1937, so it is 88 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. Its operating status is: posted for load restriction.
It carries about 18,230 vehicles a day, roughly 3% of them trucks, projected to reach 41,851 by 2031. The structure is 474 ft (144.5 m) long and 71 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY Bridge ST over Water Merrimack River built?
It was built in 1937, making it 88 years old in 2025.
What condition is HWY Bridge ST over Water Merrimack River 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 2024.
How much traffic does HWY Bridge ST over Water Merrimack River carry?
About 18,230 vehicles per day (2024 count), of which roughly 3% are trucks.
How long is HWY Bridge ST over Water Merrimack River?
The structure is 474 ft (144.5 m) long with a longest span of 197 ft (60 m) and a deck 71 ft wide.
Who owns HWY Bridge ST over Water Merrimack River?
It is owned by the State Highway Agency.