I 93 NB Offramp over ST 38 Nb/Mystic Ave
PoorMiddlesex County, Massachusetts · 3.2 KM N of JCT I93&US1 · Structure no. S170363BKDOTNBI
- Built
- 1973
- 52 years old
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 372 ft
- 5 main spans
- Daily traffic
- 19,267
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 93 NB Offramp over ST 38 Nb/Mystic Ave is a steel stringer/multi-beam or girder carrying I 93 NB Offramp over ST 38 Nb/Mystic Ave in Middlesex County, Massachusetts. It was built in 1973, so it is 52 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 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 19,267 vehicles a day, roughly 8% of them trucks, projected to reach 19,267 by 2031. The structure is 372 ft (113.4 m) long and 38 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 | 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 93 NB Offramp over ST 38 Nb/Mystic Ave built?
It was built in 1973, making it 52 years old in 2025.
What condition is I 93 NB Offramp over ST 38 Nb/Mystic Ave 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 May 2024.
How much traffic does I 93 NB Offramp over ST 38 Nb/Mystic Ave carry?
About 19,267 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is I 93 NB Offramp over ST 38 Nb/Mystic Ave?
The structure is 372 ft (113.4 m) long with a longest span of 80 ft (24.4 m) and a deck 38 ft wide.
Who owns I 93 NB Offramp over ST 38 Nb/Mystic Ave?
It is owned by the State Highway Agency.