Tr-20a over Spring Creek
Poor Condition49 years old100 vehicles/day
Location
| State | Illinois |
| County | LaSalle |
| Location | E 1st N 3660 |
| Carries | Tr-20a |
| Crosses | Spring Creek |
| Coordinates | 41.46297, -89.14601 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 3 (Serious) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Channel Beam |
| Total Length | 34.1 ft (10.4 m) |
| Max Span | 33.1 ft (10.1 m) |
| Deck Width | 26.6 ft (8.1 m) |
| Deck Area | 84.2 sq m |
| Main Spans | 1 |
| Year Built | 1977 |
Traffic
| Avg Daily Traffic | 100 (2016) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 050344800000000 |