Howison RD over Somonauk Creek
FairDeKalb County, Illinois · 705N 1200E · Structure no. 019531300000000
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected October 2024
- Type
- Channel Beam
- Concrete
- Length
- 69 ft
- 2 main spans
- Daily traffic
- 275
- 2021 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Howison RD over Somonauk Creek is a concrete channel beam carrying Howison RD over Somonauk Creek in DeKalb 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 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 275 vehicles a day, roughly 5% of them trucks, projected to reach 308 by 2046. The structure is 69 ft (21 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Howison RD over Somonauk Creek built?
It was built in 1967, making it 58 years old in 2025.
What condition is Howison RD over Somonauk Creek 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 October 2024.
How much traffic does Howison RD over Somonauk Creek carry?
About 275 vehicles per day (2021 count), of which roughly 5% are trucks.
How long is Howison RD over Somonauk Creek?
The structure is 69 ft (21 m) long with a longest span of 33 ft (10.1 m) and a deck 27 ft wide.
Who owns Howison RD over Somonauk Creek?
It is owned by the Town or Township Highway Agency.