Mcardle RD-TR91A over Mazon River
FairGrundy County, Illinois · 3.3MI Cbn Hl TR91A · Structure no. 032436100000000
- Built
- 1994
- 31 years old
- Condition
- Fair
- inspected September 2022
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 257 ft
- 3 main spans
- Daily traffic
- 200
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Mcardle RD-TR91A over Mazon River is a steel continuous stringer/multi-beam or girder carrying Mcardle RD-TR91A over Mazon River in Grundy County, Illinois. It was built in 1994, so it is 31 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 200 vehicles a day, roughly 15% of them trucks, projected to reach 240 by 2046. The structure is 257 ft (78.2 m) long and 27 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 | 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 Mcardle RD-TR91A over Mazon River built?
It was built in 1994, making it 31 years old in 2025.
What condition is Mcardle RD-TR91A 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 September 2022.
How much traffic does Mcardle RD-TR91A over Mazon River carry?
About 200 vehicles per day (2024 count), of which roughly 15% are trucks.
How long is Mcardle RD-TR91A over Mazon River?
The structure is 257 ft (78.2 m) long with a longest span of 100 ft (30.5 m) and a deck 27 ft wide.
Who owns Mcardle RD-TR91A over Mazon River?
It is owned by the Town or Township Highway Agency.