Somonauk RD FAS 96 over I-88
FairDeKalb County, Illinois · 1 MI S Cortland · Structure no. 019991600000000
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 222 ft
- 4 main spans
- Daily traffic
- 2,750
- 2021 count
- Owner
- Toll Authority
- State Toll Authority
About this bridge
Somonauk RD FAS 96 over I-88 is a prestressed concrete stringer/multi-beam or girder carrying Somonauk RD FAS 96 over I-88 in DeKalb County, Illinois. It was built in 1974, so it is 51 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 2,750 vehicles a day, roughly 14% of them trucks, projected to reach 3,080 by 2046. The structure is 222 ft (67.7 m) long and 46 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Somonauk RD FAS 96 over I-88 built?
It was built in 1974, making it 51 years old in 2025.
What condition is Somonauk RD FAS 96 over I-88 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.
How much traffic does Somonauk RD FAS 96 over I-88 carry?
About 2,750 vehicles per day (2021 count), of which roughly 14% are trucks.
How long is Somonauk RD FAS 96 over I-88?
The structure is 222 ft (67.7 m) long with a longest span of 78 ft (23.8 m) and a deck 46 ft wide.
Who owns Somonauk RD FAS 96 over I-88?
It is owned by the State Toll Authority.