Ill 97 over Sangamon R Overflow
PoorMenard County, Illinois · .5 MI SE Sangamon R. · Structure no. 065000300000000
- Built
- 1938
- 87 years old, rebuilt 1988
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 797 ft
- 12 main spans
- Daily traffic
- 1,750
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 97 over Sangamon R Overflow is a steel continuous stringer/multi-beam or girder carrying Ill 97 over Sangamon R Overflow in Menard County, Illinois. It was built in 1938 and reconstructed in 1988, so it is 87 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 1,750 vehicles a day, roughly 17% of them trucks, projected to reach 1,818 by 2046. The structure is 797 ft (242.9 m) long and 35 ft wide. If it were closed, the detour would be 24.9 mi (40 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ill 97 over Sangamon R Overflow built?
It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1988.
What condition is Ill 97 over Sangamon R Overflow 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 2024.
How much traffic does Ill 97 over Sangamon R Overflow carry?
About 1,750 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is Ill 97 over Sangamon R Overflow?
The structure is 797 ft (242.9 m) long with a longest span of 78 ft (23.8 m) and a deck 35 ft wide.
Who owns Ill 97 over Sangamon R Overflow?
It is owned by the State Highway Agency.