Tynan Road Ch C41 over Mazon River
FairGrundy County, Illinois · 0.45 N. Bracville RD · Structure no. 032324000000000
- Built
- 1962
- 63 years old, rebuilt 2010
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 184 ft
- 3 main spans
- Daily traffic
- 600
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
Tynan Road Ch C41 over Mazon River is a steel continuous stringer/multi-beam or girder carrying Tynan Road Ch C41 over Mazon River in Grundy County, Illinois. It was built in 1962 and reconstructed in 2010, so it is 63 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 5 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 600 vehicles a day, roughly 29% of them trucks, projected to reach 780 by 2046. The structure is 184 ft (56 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Tynan Road Ch C41 over Mazon River built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2010.
What condition is Tynan Road Ch C41 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 October 2024.
How much traffic does Tynan Road Ch C41 over Mazon River carry?
About 600 vehicles per day (2024 count), of which roughly 29% are trucks.
How long is Tynan Road Ch C41 over Mazon River?
The structure is 184 ft (56 m) long with a longest span of 69 ft (20.9 m) and a deck 31 ft wide.
Who owns Tynan Road Ch C41 over Mazon River?
It is owned by the County Highway Agency.