Structure 49307600000000 · Lake County, IL
Carries Oak Knoll Road over Flint Creek, .1m E Of Ridge Rd..
Set by its lowest-rated component: Deck and Superstructure at 5 of 9.
How ratings work22 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.
| State | Illinois |
| County | Lake |
| Location | .1m E Of Ridge Rd. |
| Carries | Oak Knoll Road |
| Crosses | Flint Creek |
| Coordinates | 42.16526, -88.19735 |
| Material | Concrete |
| Design | Slab |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 22.3 ft (6.8 m) |
| Deck Area | 45.6 sq m |
| Main Spans | 1 |
| Year Built | 1926 |
| Avg Daily Traffic | 225 (2023) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
| Last Inspection | June 2024 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 3 — Scour critical |
| Structure Number | 049307600000000 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.