Ia 21 over Millers Creek
Fair Condition69 years old2,600 vehicles/day
Location
| State | Iowa |
| County | Black Hawk |
| Location | 0.7 Mi. N Of S.r. D52 |
| Carries | Ia 21 |
| Crosses | Millers Creek |
| Coordinates | 42.32266, -92.34753 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 7 (Good) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 40.0 ft (12.2 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Area | 170.8 sq m |
| Main Spans | 3 |
| Year Built | 1957 |
Traffic
| Avg Daily Traffic | 2,600 (2022) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000014960 |