Tr 320 over Martinton Ditch No 3
Good Condition45 years old25 vehicles/day
Location
| State | Illinois |
| County | Iroquois |
| Location | 5.5 Mi SE Martinton |
| Carries | Tr 320 |
| Crosses | Martinton Ditch No 3 |
| Coordinates | 40.89108, -87.67326 |
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 | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 44.9 ft (13.7 m) |
| Max Span | 43.0 ft (13.1 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 138.4 sq m |
| Main Spans | 1 |
| Year Built | 1981 |
Traffic
| Avg Daily Traffic | 25 (2022) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 48 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 038454900000000 |