Route 313 over Naugatuck River
FairNew Haven County, Connecticut · 450 Feet East of Route 8 · Structure no. 01586
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 473 ft
- 6 main spans
- Daily traffic
- 9,900
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Route 313 over Naugatuck River is a prestressed concrete stringer/multi-beam or girder carrying Route 313 over Naugatuck River in New Haven County, Connecticut. It was built in 1958, so it is 67 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 9,900 vehicles a day, roughly 6% of them trucks, projected to reach 14,710 by 2041. The structure is 473 ft (144.2 m) long and 58 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 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 Route 313 over Naugatuck River built?
It was built in 1958, making it 67 years old in 2025.
What condition is Route 313 over Naugatuck 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 September 2024.
How much traffic does Route 313 over Naugatuck River carry?
About 9,900 vehicles per day (2021 count), of which roughly 6% are trucks.
How long is Route 313 over Naugatuck River?
The structure is 473 ft (144.2 m) long with a longest span of 78 ft (23.9 m) and a deck 58 ft wide.
Who owns Route 313 over Naugatuck River?
It is owned by the State Highway Agency.