Niggli Rd/ TR 179 over E. Fork Silver Ck
GoodMadison County, Illinois · 2.5 MI N Grantfork · Structure no. 060330500000000
- Built
- 1991
- 34 years old
- Condition
- Good
- inspected December 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 61 ft
- 1 main span
- Daily traffic
- 100
- 2021 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Niggli Rd/ TR 179 over E. Fork Silver Ck is a prestressed concrete box beam or girders - multiple carrying Niggli Rd/ TR 179 over E. Fork Silver Ck in Madison County, Illinois. It was built in 1991, so it is 34 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 61 ft (18.7 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Niggli Rd/ TR 179 over E. Fork Silver Ck built?
It was built in 1991, making it 34 years old in 2025.
What condition is Niggli Rd/ TR 179 over E. Fork Silver Ck 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 Niggli Rd/ TR 179 over E. Fork Silver Ck carry?
About 100 vehicles per day (2021 count), of which roughly 21% are trucks.
How long is Niggli Rd/ TR 179 over E. Fork Silver Ck?
The structure is 61 ft (18.7 m) long with a longest span of 59 ft (18 m) and a deck 28 ft wide.
Who owns Niggli Rd/ TR 179 over E. Fork Silver Ck?
It is owned by the Town or Township Highway Agency.