Linn-johnson RD over Knapp Creek
Fair Condition42 years old46 vehicles/day
Location
| State | Iowa |
| County | Johnson |
| Location | 081080601 |
| Carries | Linn-johnson RD |
| Crosses | Knapp Creek |
| Coordinates | 41.86185, -91.82729 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 127.0 ft (38.7 m) |
| Max Span | 45.9 ft (14 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 390.9 sq m |
| Main Spans | 3 |
| Year Built | 1984 |
Traffic
| Avg Daily Traffic | 46 (2021) |
| Truck Traffic | 28% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000205741 |