L20 Loess Hills over Allen Creek
Good Condition36 years old767 vehicles/day
Location
| State | Iowa |
| County | Harrison |
| Location | 079441104 |
| Carries | L20 Loess Hills |
| Crosses | Allen Creek |
| Coordinates | 41.67456, -95.93410 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 150.9 ft (46 m) |
| Max Span | 68.9 ft (21 m) |
| Deck Width | 39.0 ft (11.9 m) |
| Deck Area | 547.4 sq m |
| Main Spans | 3 |
| Year Built | 1990 |
Traffic
| Avg Daily Traffic | 767 (2022) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000027901 |