L20 Loess Hills over Boyer River
Fair Condition35 years old1,065 vehicles/day
Location
| State | Iowa |
| County | Harrison |
| Location | 078442210 |
| Carries | L20 Loess Hills |
| Crosses | Boyer River |
| Coordinates | 41.53632, -95.88503 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 294.0 ft (89.6 m) |
| Max Span | 119.1 ft (36.3 m) |
| Deck Width | 39.0 ft (11.9 m) |
| Deck Area | 1066.2 sq m |
| Main Spans | 3 |
| Year Built | 1991 |
Traffic
| Avg Daily Traffic | 1,065 (2022) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000027801 |