Ill 47 over Unknown Creek
Good Condition32 years old3,600 vehicles/day
Location
| State | Illinois |
| County | Grundy |
| Location | 3.58 M N Of I-55 |
| Carries | Ill 47 |
| Crosses | Unknown Creek |
| Coordinates | 41.16911, -88.41614 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 6 (Satisfactory) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 32.5 ft (9.9 m) |
| Max Span | 32.5 ft (9.9 m) |
| Deck Area | 120.8 sq m |
| Main Spans | 2 |
| Year Built | 1994 |
Traffic
| Avg Daily Traffic | 3,600 (2023) |
| Truck Traffic | 25% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 321 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 032200600000000 |