Zilles Rd/ TR 392 over Trib to Spanker Br
PoorMadison County, Illinois · 4.5MI SE Highland · Structure no. 060320700000000
- Built
- 1925
- 100 years old
- Condition
- Poor
- inspected November 2024
- Type
- Slab
- Concrete
- Length
- 22 ft
- 1 main span
- Daily traffic
- 150
- 2021 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Zilles Rd/ TR 392 over Trib to Spanker Br is a concrete slab carrying Zilles Rd/ TR 392 over Trib to Spanker Br in Madison County, Illinois. It was built in 1925, so it is 100 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 150 vehicles a day, roughly 14% of them trucks, projected to reach 161 by 2046. The structure is 22 ft (6.7 m) long and 20 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Zilles Rd/ TR 392 over Trib to Spanker Br built?
It was built in 1925, making it 100 years old in 2025.
What condition is Zilles Rd/ TR 392 over Trib to Spanker Br 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 November 2024.
How much traffic does Zilles Rd/ TR 392 over Trib to Spanker Br carry?
About 150 vehicles per day (2021 count), of which roughly 14% are trucks.
How long is Zilles Rd/ TR 392 over Trib to Spanker Br?
The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 20 ft wide.
Who owns Zilles Rd/ TR 392 over Trib to Spanker Br?
It is owned by the Town or Township Highway Agency.