TR 6A Mercer CO Li over Trib.To N.Henderson
PoorKnox County, Illinois · SW-7-T13NR1E · Structure no. 048305300000000
- Built
- 1965
- 60 years old
- Condition
- Poor
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 33 ft
- 1 main span
- Daily traffic
- 10
- 2022 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 6A Mercer CO Li over Trib.To N.Henderson is a prestressed concrete box beam or girders - multiple carrying TR 6A Mercer CO Li over Trib.To N.Henderson in Knox County, Illinois. It was built in 1965, so it is 60 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 10 vehicles a day, projected to reach 10 by 2046. The structure is 33 ft (10.2 m) long and 22 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 6A Mercer CO Li over Trib.To N.Henderson built?
It was built in 1965, making it 60 years old in 2025.
What condition is TR 6A Mercer CO Li over Trib.To N.Henderson 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 March 2023.
How much traffic does TR 6A Mercer CO Li over Trib.To N.Henderson carry?
About 10 vehicles per day (2022 count).
How long is TR 6A Mercer CO Li over Trib.To N.Henderson?
The structure is 33 ft (10.2 m) long with a longest span of 31 ft (9.3 m) and a deck 22 ft wide.
Who owns TR 6A Mercer CO Li over Trib.To N.Henderson?
It is owned by the Town or Township Highway Agency.