Route 42 over Naugatuck River and Mnrr
FairNew Haven County, Connecticut · 0.4 Mile West of Route 8 · Structure no. 03432
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 565 ft
- 7 main spans
- Daily traffic
- 7,100
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Route 42 over Naugatuck River and Mnrr is a steel stringer/multi-beam or girder carrying Route 42 over Naugatuck River and Mnrr in New Haven County, Connecticut. It was built in 1966, so it is 59 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 5 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 7,100 vehicles a day, roughly 5% of them trucks, projected to reach 10,550 by 2041. The structure is 565 ft (172.2 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Route 42 over Naugatuck River and Mnrr built?
It was built in 1966, making it 59 years old in 2025.
What condition is Route 42 over Naugatuck River and Mnrr 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 February 2023.
How much traffic does Route 42 over Naugatuck River and Mnrr carry?
About 7,100 vehicles per day (2021 count), of which roughly 5% are trucks.
How long is Route 42 over Naugatuck River and Mnrr?
The structure is 565 ft (172.2 m) long with a longest span of 79 ft (24.1 m) and a deck 35 ft wide.
Who owns Route 42 over Naugatuck River and Mnrr?
It is owned by the State Highway Agency.