ST135 Union ST over Water Sudbury River
FairMiddlesex County, Massachusetts · 2.5 MI W of 126 & 135 · Structure no. A1400128ADOTNBI
- Built
- 1900
- 125 years old, rebuilt 1955
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 92 ft
- 1 main span
- Daily traffic
- 11,481
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
ST135 Union ST over Water Sudbury River is a steel stringer/multi-beam or girder carrying ST135 Union ST over Water Sudbury River in Middlesex County, Massachusetts. It was built in 1900 and reconstructed in 1955, so it is 125 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.
It carries about 11,481 vehicles a day, roughly 10% of them trucks, projected to reach 36,008 by 2032. The structure is 92 ft (28 m) long and 48 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 ST135 Union ST over Water Sudbury River built?
It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1955.
What condition is ST135 Union ST over Water Sudbury 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 August 2023.
How much traffic does ST135 Union ST over Water Sudbury River carry?
About 11,481 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is ST135 Union ST over Water Sudbury River?
The structure is 92 ft (28 m) long with a longest span of 52 ft (15.8 m) and a deck 48 ft wide.
Who owns ST135 Union ST over Water Sudbury River?
It is owned by the State Highway Agency.