ST129 Lowell ST over I 93
PoorPosted for loadMiddlesex County, Massachusetts · Rt 129 at Rt 93 · Structure no. W380292KVDOTNBI
- Built
- 1957
- 68 years old
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 260 ft
- 2 main spans
- Daily traffic
- 26,250
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
ST129 Lowell ST over I 93 is a steel stringer/multi-beam or girder carrying ST129 Lowell ST over I 93 in Middlesex County, Massachusetts. It was built in 1957, so it is 68 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 3 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. Its operating status is: posted for load restriction.
It carries about 26,250 vehicles a day, roughly 9% of them trucks, projected to reach 41,694 by 2031. The structure is 260 ft (79.2 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was ST129 Lowell ST over I 93 built?
It was built in 1957, making it 68 years old in 2025.
What condition is ST129 Lowell ST over I 93 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 ST129 Lowell ST over I 93 carry?
About 26,250 vehicles per day (2024 count), of which roughly 9% are trucks.
How long is ST129 Lowell ST over I 93?
The structure is 260 ft (79.2 m) long with a longest span of 98 ft (29.9 m) and a deck 54 ft wide.
Who owns ST129 Lowell ST over I 93?
It is owned by the State Highway Agency.