Il 78 over Sangamon River
GoodCass County, Illinois · .5 N Chandlerville · Structure no. 009051000000000
- Built
- 2011
- 14 years old
- Condition
- Good
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,820 ft
- 12 main spans
- Daily traffic
- 1,450
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 78 over Sangamon River is a steel continuous stringer/multi-beam or girder carrying Il 78 over Sangamon River in Cass County, Illinois. It was built in 2011, so it is 14 years old, younger than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,450 vehicles a day, roughly 10% of them trucks, projected to reach 1,919 by 2046. The structure is 1,820 ft (554.7 m) long and 39 ft wide. If it were closed, the detour would be 29.8 mi (48 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 78 over Sangamon River built?
It was built in 2011, making it 14 years old in 2025.
What condition is Il 78 over Sangamon River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.
How much traffic does Il 78 over Sangamon River carry?
About 1,450 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Il 78 over Sangamon River?
The structure is 1,820 ft (554.7 m) long with a longest span of 192 ft (58.5 m) and a deck 39 ft wide.
Who owns Il 78 over Sangamon River?
It is owned by the State Highway Agency.