TR 166 over Grove Creek
PoorHancock County, Illinois · 1.5 NE Adrian · Structure no. 034512000000000
- Built
- 1961
- 64 years old
- Condition
- Poor
- inspected December 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 50
- 2023 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 166 over Grove Creek is a prestressed concrete box beam or girders - multiple carrying TR 166 over Grove Creek in Hancock County, Illinois. It was built in 1961, so it is 64 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 50 vehicles a day, projected to reach 51 by 2046. The structure is 30 ft (9.1 m) long and 21 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 TR 166 over Grove Creek built?
It was built in 1961, making it 64 years old in 2025.
What condition is TR 166 over Grove Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.
How much traffic does TR 166 over Grove Creek carry?
About 50 vehicles per day (2023 count).
How long is TR 166 over Grove Creek?
The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 21 ft wide.
Who owns TR 166 over Grove Creek?
It is owned by the Town or Township Highway Agency.