IRR BIA RTE 18 over Blackduck River
Fair Condition50 years old400 vehicles/day
Location
| State | Minnesota |
| County | Beltrami |
| Location | 12 Km NE Of Redby |
| Carries | IRR BIA RTE 18 |
| Crosses | Blackduck River |
| Coordinates | 47.89281, -94.76547 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 336.9 ft (102.7 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 35.1 ft (10.7 m) |
| Deck Area | 1098.9 sq m |
| Main Spans | 5 |
| Year Built | 1976 |
Traffic
| Avg Daily Traffic | 400 (2023) |
| Truck Traffic | 20% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Indian Affairs |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 00000000000F124 |