INTERSTATE-91 SB over Muddy River
GoodNew Haven County, Connecticut · 0.8 MI South of Rt 40 · Structure no. 03105
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 91 ft
- 1 main span
- Daily traffic
- 55,750
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
INTERSTATE-91 SB over Muddy River is a steel stringer/multi-beam or girder carrying INTERSTATE-91 SB over Muddy River in New Haven County, Connecticut. It was built in 1965, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 55,750 vehicles a day, roughly 9% of them trucks, projected to reach 82,839 by 2035. The structure is 91 ft (27.7 m) long and 68 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was INTERSTATE-91 SB over Muddy River built?
It was built in 1965, making it 60 years old in 2025.
What condition is INTERSTATE-91 SB over Muddy River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.
How much traffic does INTERSTATE-91 SB over Muddy River carry?
About 55,750 vehicles per day (2015 count), of which roughly 9% are trucks.
How long is INTERSTATE-91 SB over Muddy River?
The structure is 91 ft (27.7 m) long with a longest span of 86 ft (26.2 m) and a deck 68 ft wide.
Who owns INTERSTATE-91 SB over Muddy River?
It is owned by the State Highway Agency.