Tr 179/niggli Road over Little Silver Creek
Good Condition42 years old100 vehicles/day
Location
| State | Illinois |
| County | Madison |
| Location | 4.0 Mi NE Grantfork |
| Carries | Tr 179/niggli Road |
| Crosses | Little Silver Creek |
| Coordinates | 38.85985, -89.60530 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 74.1 ft (22.6 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 28.2 ft (8.6 m) |
| Deck Area | 194.4 sq m |
| Main Spans | 3 |
| Year Built | 1984 |
Traffic
| Avg Daily Traffic | 100 (2021) |
| Truck Traffic | 21% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2023 |
| Inspection Frequency | Every 48 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 060326700000000 |