ST117 Main ST over I 95 /ST128
PoorMiddlesex County, Massachusetts · 0.5 MI Nly Rt 20 · Structure no. W040282K3DOTNBI
- Built
- 1962
- 63 years old
- Condition
- Poor
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 218 ft
- 4 main spans
- Daily traffic
- 18,600
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
ST117 Main ST over I 95 /ST128 is a steel continuous stringer/multi-beam or girder carrying ST117 Main ST over I 95 /ST128 in Middlesex County, Massachusetts. It was built in 1962, so it is 63 years old, younger 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.
It carries about 18,600 vehicles a day, roughly 3% of them trucks, projected to reach 61,435 by 2032. The structure is 218 ft (66.4 m) long and 61 ft wide. If it were closed, the detour would be 3.7 mi (6 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 ST117 Main ST over I 95 /ST128 built?
It was built in 1962, making it 63 years old in 2025.
What condition is ST117 Main ST over I 95 /ST128 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 October 2023.
How much traffic does ST117 Main ST over I 95 /ST128 carry?
About 18,600 vehicles per day (2018 count), of which roughly 3% are trucks.
How long is ST117 Main ST over I 95 /ST128?
The structure is 218 ft (66.4 m) long with a longest span of 75 ft (22.9 m) and a deck 61 ft wide.
Who owns ST117 Main ST over I 95 /ST128?
It is owned by the State Highway Agency.