Ch 4 over Spring Branch
Poor Condition53 years old50 vehicles/day
Location
| State | Illinois |
| County | Bond |
| Location | 4.5m N Keysport |
| Carries | Ch 4 |
| Crosses | Spring Branch |
| Coordinates | 38.80761, -89.28117 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Channel Beam |
| Total Length | 36.1 ft (11 m) |
| Max Span | 35.1 ft (10.7 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 88 sq m |
| Main Spans | 1 |
| Year Built | 1973 |
Traffic
| Avg Daily Traffic | 50 (2020) |
| Truck Traffic | 24% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 003301800000000 |