Il 173 over N Br Nippersink CR
GoodMcHenry County, Illinois · 0.5 M W of US 12 · Structure no. 056003000000000
- Built
- 1932
- 93 years old, rebuilt 1998
- Condition
- Good
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 65 ft
- 1 main span
- Daily traffic
- 5,100
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 173 over N Br Nippersink CR is a prestressed concrete stringer/multi-beam or girder carrying Il 173 over N Br Nippersink CR in McHenry County, Illinois. It was built in 1932 and reconstructed in 1998, so it is 93 years old, older 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 5,100 vehicles a day, roughly 6% of them trucks, projected to reach 6,960 by 2046. The structure is 65 ft (19.8 m) long and 38 ft wide. If it were closed, the detour would be 28 mi (45 km).
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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 173 over N Br Nippersink CR built?
It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1998.
What condition is Il 173 over N Br Nippersink CR 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 March 2023.
How much traffic does Il 173 over N Br Nippersink CR carry?
About 5,100 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is Il 173 over N Br Nippersink CR?
The structure is 65 ft (19.8 m) long with a longest span of 65 ft (19.8 m) and a deck 38 ft wide.
Who owns Il 173 over N Br Nippersink CR?
It is owned by the State Highway Agency.