Il 173 over Mill Creek
GoodLake County, Illinois · 0.3 M E of US 45 · Structure no. 049019500000000
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected January 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 59 ft
- 1 main span
- Daily traffic
- 15,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 173 over Mill Creek is a steel continuous stringer/multi-beam or girder carrying Il 173 over Mill Creek in Lake County, Illinois. It was built in 2003, so it is 22 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 15,600 vehicles a day, roughly 5% of them trucks, projected to reach 15,600 by 2046. The structure is 59 ft (18 m) long and 43 ft wide.
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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 173 over Mill Creek built?
It was built in 2003, making it 22 years old in 2025.
What condition is Il 173 over Mill Creek 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 January 2023.
How much traffic does Il 173 over Mill Creek carry?
About 15,600 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Il 173 over Mill Creek?
The structure is 59 ft (18 m) long with a longest span of 59 ft (18 m) and a deck 43 ft wide.
Who owns Il 173 over Mill Creek?
It is owned by the State Highway Agency.