HWY Walnut ST over TR Green Line D
PoorMiddlesex County, Massachusetts · Over Green Line · Structure no. N120394U2MBTNBI
- Built
- 1906
- 119 years old, rebuilt 1963
- Condition
- Poor
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 44 ft
- 1 main span
- Daily traffic
- 24,569
- 2022 count
- Owner
- State
- Other State Agency
About this bridge
HWY Walnut ST over TR Green Line D is a prestressed concrete box beam or girders - multiple carrying HWY Walnut ST over TR Green Line D in Middlesex County, Massachusetts. It was built in 1906 and reconstructed in 1963, so it is 119 years old, older than the Massachusetts average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 24,569 vehicles a day, roughly 3% of them trucks, projected to reach 21,478 by 2031. The structure is 44 ft (13.4 m) long and 68 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY Walnut ST over TR Green Line D built?
It was built in 1906, making it 119 years old in 2025. It was reconstructed in 1963.
What condition is HWY Walnut ST over TR Green Line D in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.
How much traffic does HWY Walnut ST over TR Green Line D carry?
About 24,569 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is HWY Walnut ST over TR Green Line D?
The structure is 44 ft (13.4 m) long with a longest span of 43 ft (13.1 m) and a deck 68 ft wide.
Who owns HWY Walnut ST over TR Green Line D?
It is owned by the Other State Agency and maintained by the State Highway Agency.