TR 179/NIGGLI Road over Little Silver Creek
GoodMadison County, Illinois · 4.0 MI NE Grantfork · Structure no. 060326700000000
- Built
- 1984
- 41 years old
- Condition
- Good
- inspected December 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 74 ft
- 3 main spans
- Daily traffic
- 100
- 2021 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 179/NIGGLI Road over Little Silver Creek is a prestressed concrete box beam or girders - multiple carrying TR 179/NIGGLI Road over Little Silver Creek in Madison 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 100 vehicles a day, roughly 21% of them trucks, projected to reach 107 by 2046. The structure is 74 ft (22.6 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was TR 179/NIGGLI Road over Little Silver Creek built?
It was built in 1984, making it 41 years old in 2025.
What condition is TR 179/NIGGLI Road over Little Silver Creek 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 December 2023.
How much traffic does TR 179/NIGGLI Road over Little Silver Creek carry?
About 100 vehicles per day (2021 count), of which roughly 21% are trucks.
How long is TR 179/NIGGLI Road over Little Silver Creek?
The structure is 74 ft (22.6 m) long with a longest span of 25 ft (7.6 m) and a deck 28 ft wide.
Who owns TR 179/NIGGLI Road over Little Silver Creek?
It is owned by the Town or Township Highway Agency.