US 150 over Spoon River
PoorKnox County, Illinois · 4 MI W of Ill 180 · Structure no. 048003100000000
- Built
- 1930
- 95 years old, rebuilt 1980
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 594 ft
- 11 main spans
- Daily traffic
- 1,100
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 150 over Spoon River is a prestressed concrete continuous stringer/multi-beam or girder carrying US 150 over Spoon River in Knox County, Illinois. It was built in 1930 and reconstructed in 1980, so it is 95 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 1,100 vehicles a day, roughly 6% of them trucks, projected to reach 1,212 by 2046. The structure is 594 ft (181.1 m) long and 32 ft wide. If it were closed, the detour would be 19.9 mi (32 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 150 over Spoon River built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1980.
What condition is US 150 over Spoon River 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 150 over Spoon River carry?
About 1,100 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 150 over Spoon River?
The structure is 594 ft (181.1 m) long with a longest span of 71 ft (21.5 m) and a deck 32 ft wide.
Who owns US 150 over Spoon River?
It is owned by the State Highway Agency.