Route 171 over Mill Brook
FairWindham County, Connecticut · 1.7 Miles West of RTE 169 · Structure no. 06148
- Built
- 1992
- 33 years old
- Condition
- Fair
- inspected August 2024
- Type
- Culvert
- Concrete
- Length
- 22 ft
- 2 main spans
- Daily traffic
- 5,100
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Route 171 over Mill Brook is a concrete culvert carrying Route 171 over Mill Brook in Windham County, Connecticut. It was built in 1992, so it is 33 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 5,100 vehicles a day, roughly 3% of them trucks, projected to reach 7,578 by 2042. The structure is 22 ft (6.7 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Route 171 over Mill Brook built?
It was built in 1992, making it 33 years old in 2025.
What condition is Route 171 over Mill Brook 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 August 2024.
How much traffic does Route 171 over Mill Brook carry?
About 5,100 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is Route 171 over Mill Brook?
The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 34 ft wide.
Who owns Route 171 over Mill Brook?
It is owned by the State Highway Agency.