Il 31 SB Ent Ramp over Crystal Creek
Good Condition13 years old1,500 vehicles/day
Location
| State | Illinois |
| County | McHenry |
| Location | 0.1 M S Algonquin RD |
| Carries | Il 31 SB Ent Ramp |
| Crosses | Crystal Creek |
| Coordinates | 42.16881, -88.29723 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 149.6 ft (45.6 m) |
| Max Span | 142.1 ft (43.3 m) |
| Deck Width | 33.5 ft (10.2 m) |
| Deck Area | 465.1 sq m |
| Main Spans | 1 |
| Year Built | 2013 |
Traffic
| Avg Daily Traffic | 1,500 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 056008000000000 |