Backbone ST Pk over Maquoketa River
Fair Condition50 years old
Location
| State | Iowa |
| County | Delaware |
| Location | In Backbone State Park |
| Carries | Backbone ST Pk |
| Crosses | Maquoketa River |
| Coordinates | 42.59888, -91.53771 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 128.0 ft (39 m) |
| Max Span | 48.9 ft (14.9 m) |
| Deck Width | 32.2 ft (9.8 m) |
| Deck Area | 382.2 sq m |
| Main Spans | 3 |
| Year Built | 1976 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | State Park/Forest Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000699051 |