Ill 113 over Mazon River
FairGrundy County, Illinois · 3.12 M E. of Ill 47 · Structure no. 032009800000000
- Built
- 2000
- 25 years old
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 254 ft
- 3 main spans
- Daily traffic
- 4,450
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 113 over Mazon River is a steel stringer/multi-beam or girder carrying Ill 113 over Mazon River in Grundy County, Illinois. It was built in 2000, so it is 25 years old, younger 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 4,450 vehicles a day, roughly 6% of them trucks, projected to reach 5,460 by 2046. The structure is 254 ft (77.5 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Ill 113 over Mazon River built?
It was built in 2000, making it 25 years old in 2025.
What condition is Ill 113 over Mazon River 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 February 2023.
How much traffic does Ill 113 over Mazon River carry?
About 4,450 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is Ill 113 over Mazon River?
The structure is 254 ft (77.5 m) long with a longest span of 105 ft (32 m) and a deck 39 ft wide.
Who owns Ill 113 over Mazon River?
It is owned by the State Highway Agency.