Ill 78 over I-74
PoorPeoria County, Illinois · 5 MI W of Brimfield · Structure no. 072003200000000
- Built
- 1967
- 58 years old
- Condition
- Poor
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 228 ft
- 4 main spans
- Daily traffic
- 550
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 78 over I-74 is a steel continuous stringer/multi-beam or girder carrying Ill 78 over I-74 in Peoria County, Illinois. It was built in 1967, so it is 58 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 3 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 550 vehicles a day, roughly 18% of them trucks, projected to reach 556 by 2046. The structure is 228 ft (69.5 m) long and 36 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ill 78 over I-74 built?
It was built in 1967, making it 58 years old in 2025.
What condition is Ill 78 over I-74 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 January 2024.
How much traffic does Ill 78 over I-74 carry?
About 550 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is Ill 78 over I-74?
The structure is 228 ft (69.5 m) long with a longest span of 70 ft (21.3 m) and a deck 36 ft wide.
Who owns Ill 78 over I-74?
It is owned by the State Highway Agency.