TR 171 over Sleepy Hollow Branch
GoodMason County, Illinois · 3.5MI SW Mason City · Structure no. 063480300000000
- Built
- 1989
- 36 years old
- Condition
- Good
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 54 ft
- 1 main span
- Daily traffic
- 50
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 171 over Sleepy Hollow Branch is a prestressed concrete box beam or girders - multiple carrying TR 171 over Sleepy Hollow Branch in Mason County, Illinois. It was built in 1989, so it is 36 years old, younger than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 50 vehicles a day, roughly 20% of them trucks, projected to reach 51 by 2046. The structure is 54 ft (16.5 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was TR 171 over Sleepy Hollow Branch built?
It was built in 1989, making it 36 years old in 2025.
What condition is TR 171 over Sleepy Hollow Branch in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.
How much traffic does TR 171 over Sleepy Hollow Branch carry?
About 50 vehicles per day (2024 count), of which roughly 20% are trucks.
How long is TR 171 over Sleepy Hollow Branch?
The structure is 54 ft (16.5 m) long with a longest span of 52 ft (15.7 m) and a deck 30 ft wide.
Who owns TR 171 over Sleepy Hollow Branch?
It is owned by the Town or Township Highway Agency.