Rocky Comfort RD over Trib to Grassy Lake
GoodWilliamson County, Illinois · 9MI S of Carterville · Structure no. 100316600000000
- Built
- 2002
- 23 years old
- Condition
- Good
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 62 ft
- 1 main span
- Daily traffic
- 350
- 2020 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Rocky Comfort RD over Trib to Grassy Lake is a prestressed concrete box beam or girders - multiple carrying Rocky Comfort RD over Trib to Grassy Lake in Williamson County, Illinois. It was built in 2002, so it is 23 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 350 vehicles a day, roughly 6% of them trucks, projected to reach 303 by 2046. The structure is 62 ft (18.8 m) long and 24 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Rocky Comfort RD over Trib to Grassy Lake built?
It was built in 2002, making it 23 years old in 2025.
What condition is Rocky Comfort RD over Trib to Grassy Lake 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 February 2024.
How much traffic does Rocky Comfort RD over Trib to Grassy Lake carry?
About 350 vehicles per day (2020 count), of which roughly 6% are trucks.
How long is Rocky Comfort RD over Trib to Grassy Lake?
The structure is 62 ft (18.8 m) long with a longest span of 59 ft (18 m) and a deck 24 ft wide.
Who owns Rocky Comfort RD over Trib to Grassy Lake?
It is owned by the Town or Township Highway Agency.