INTERSTATE-91 SB over Mattabesset River
FairMiddlesex County, Connecticut · 0.1 MI S of Route 372 · Structure no. 03078
- Built
- 1965
- 60 years old, rebuilt 1998
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 220 ft
- 3 main spans
- Daily traffic
- 49,200
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
INTERSTATE-91 SB over Mattabesset River is a steel stringer/multi-beam or girder carrying INTERSTATE-91 SB over Mattabesset River in Middlesex County, Connecticut. It was built in 1965 and reconstructed in 1998, so it is 60 years old, older than the Connecticut average of 56.7 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 49,200 vehicles a day, roughly 9% of them trucks, projected to reach 73,106 by 2042. The structure is 220 ft (67.1 m) long and 55 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 INTERSTATE-91 SB over Mattabesset River built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1998.
What condition is INTERSTATE-91 SB over Mattabesset 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 2024.
How much traffic does INTERSTATE-91 SB over Mattabesset River carry?
About 49,200 vehicles per day (2022 count), of which roughly 9% are trucks.
How long is INTERSTATE-91 SB over Mattabesset River?
The structure is 220 ft (67.1 m) long with a longest span of 75 ft (22.9 m) and a deck 55 ft wide.
Who owns INTERSTATE-91 SB over Mattabesset River?
It is owned by the State Highway Agency.