U.S. Route 1 over Five Mile River
FairFairfield County, Connecticut · 200 Ft North of Darien Tl · Structure no. 00317
- Built
- 1850
- 175 years old, rebuilt 1927
- Condition
- Fair
- inspected November 2023
- Type
- Arch - Deck
- Concrete
- Length
- 33 ft
- 1 main span
- Daily traffic
- 21,900
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Route 1 over Five Mile River is a concrete arch - deck carrying U.S. Route 1 over Five Mile River in Fairfield County, Connecticut. It was built in 1850 and reconstructed in 1927, so it is 175 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 21,900 vehicles a day, roughly 8% of them trucks, projected to reach 32,541 by 2043. The structure is 33 ft (10.1 m) long and 65 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 |
|---|---|---|
| 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 U.S. Route 1 over Five Mile River built?
It was built in 1850, making it 175 years old in 2025. It was reconstructed in 1927.
What condition is U.S. Route 1 over Five Mile 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 November 2023.
How much traffic does U.S. Route 1 over Five Mile River carry?
About 21,900 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is U.S. Route 1 over Five Mile River?
The structure is 33 ft (10.1 m) long with a longest span of 33 ft (10.1 m) and a deck 65 ft wide.
Who owns U.S. Route 1 over Five Mile River?
It is owned by the State Highway Agency.