Whitetie RD TR 77 over Mazon River
GoodGrundy County, Illinois · 0.01 MI S Oxbow RD · Structure no. 032435600000000
- Built
- 1984
- 41 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 312 ft
- 3 main spans
- Daily traffic
- 250
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Whitetie RD TR 77 over Mazon River is a steel continuous stringer/multi-beam or girder carrying Whitetie RD TR 77 over Mazon River in Grundy County, Illinois. It was built in 1984, so it is 41 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 250 vehicles a day, roughly 18% of them trucks, projected to reach 300 by 2046. The structure is 312 ft (95.1 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 Whitetie RD TR 77 over Mazon River built?
It was built in 1984, making it 41 years old in 2025.
What condition is Whitetie RD TR 77 over Mazon River 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 October 2024.
How much traffic does Whitetie RD TR 77 over Mazon River carry?
About 250 vehicles per day (2024 count), of which roughly 18% are trucks.
How long is Whitetie RD TR 77 over Mazon River?
The structure is 312 ft (95.1 m) long with a longest span of 119 ft (36.3 m) and a deck 27 ft wide.
Who owns Whitetie RD TR 77 over Mazon River?
It is owned by the Town or Township Highway Agency.