US Route 1 over Mill River
FairFairfield County, Connecticut · Near Sasco Hill Road · Structure no. 05858
- Built
- 1990
- 35 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 81 ft
- 1 main span
- Daily traffic
- 14,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US Route 1 over Mill River is a steel stringer/multi-beam or girder carrying US Route 1 over Mill River in Fairfield County, Connecticut. It was built in 1990, so it is 35 years old, younger 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 14,500 vehicles a day, roughly 6% of them trucks, projected to reach 21,546 by 2042. The structure is 81 ft (24.7 m) long and 66 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 US Route 1 over Mill River built?
It was built in 1990, making it 35 years old in 2025.
What condition is US Route 1 over Mill 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 2024.
How much traffic does US Route 1 over Mill River carry?
About 14,500 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is US Route 1 over Mill River?
The structure is 81 ft (24.7 m) long with a longest span of 77 ft (23.5 m) and a deck 66 ft wide.
Who owns US Route 1 over Mill River?
It is owned by the State Highway Agency.