Arsenal RD over Sylvan Slough
Fair Condition120 years old8,900 vehicles/day
Location
| State | Illinois |
| County | Rock Island |
| Location | Viaduct Ri Arsenal |
| Carries | Arsenal RD |
| Crosses | Sylvan Slough |
| Coordinates | 41.51205, -90.56553 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 603.3 ft (183.9 m) |
| Max Span | 83.7 ft (25.5 m) |
| Deck Width | 32.8 ft (10 m) |
| Deck Area | 1,839 sq m |
| Main Spans | 8 |
| Year Built | 1906 (reconstructed 1967) |
Traffic
| Avg Daily Traffic | 8,900 (2022) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | Army |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 000000000819904 |