Route 59 over Mill River
FairFairfield County, Connecticut · 625 Ft N of Route 15 · Structure no. 01029
- Built
- 1939
- 86 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 43 ft
- 1 main span
- Daily traffic
- 10,800
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Route 59 over Mill River is a steel stringer/multi-beam or girder carrying Route 59 over Mill River in Fairfield County, Connecticut. It was built in 1939, so it is 86 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 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 10,800 vehicles a day, roughly 6% of them trucks, projected to reach 16,048 by 2042. The structure is 43 ft (13 m) long and 50 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Route 59 over Mill River built?
It was built in 1939, making it 86 years old in 2025.
What condition is Route 59 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 September 2023.
How much traffic does Route 59 over Mill River carry?
About 10,800 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is Route 59 over Mill River?
The structure is 43 ft (13 m) long with a longest span of 36 ft (11 m) and a deck 50 ft wide.
Who owns Route 59 over Mill River?
It is owned by the State Highway Agency.