Backbone State Pk over Br Maquoketa River
Fair Condition50 years old
Location
| State | Iowa |
| County | Delaware |
| Location | In Backbone State Park |
| Carries | Backbone State Pk |
| Crosses | Br Maquoketa River |
| Coordinates | 42.59979, -91.53827 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 139.1 ft (42.4 m) |
| Max Span | 39.0 ft (11.9 m) |
| Deck Width | 32.2 ft (9.8 m) |
| Deck Area | 415.5 sq m |
| Main Spans | 4 |
| 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 | 000000000699055 |