US 51 over Cnic RR
PoorJackson County, Illinois · 3 MI N of Desoto · Structure no. 039005200000000
- Built
- 1983
- 42 years old
- Condition
- Poor
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 151 ft
- 3 main spans
- Daily traffic
- 5,150
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 51 over Cnic RR is a prestressed concrete box beam or girders - multiple carrying US 51 over Cnic RR in Jackson County, Illinois. It was built in 1983, so it is 42 years old, younger 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 2 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. Its operating status is: open, would be posted or closed except for temporary shoring.
It carries about 5,150 vehicles a day, roughly 9% of them trucks, projected to reach 5,454 by 2046. The structure is 151 ft (46 m) long and 38 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Superstructure | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 51 over Cnic RR built?
It was built in 1983, making it 42 years old in 2025.
What condition is US 51 over Cnic RR 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 August 2024.
How much traffic does US 51 over Cnic RR carry?
About 5,150 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is US 51 over Cnic RR?
The structure is 151 ft (46 m) long with a longest span of 63 ft (19.1 m) and a deck 38 ft wide.
Who owns US 51 over Cnic RR?
It is owned by the State Highway Agency.