IRR BIA RTE 13 over South Fork Milk River
Poor Condition47 years old60 vehicles/day
Location
| State | Montana |
| County | Glacier |
| Location | 31km North Blackfeet Schl |
| Carries | IRR BIA RTE 13 |
| Crosses | South Fork Milk River |
| Coordinates | 48.85965, -113.01708 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 102.0 ft (31.1 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 25.6 ft (7.8 m) |
| Deck Area | 242.6 sq m |
| Main Spans | 4 |
| Year Built | 1979 |
Traffic
| Avg Daily Traffic | 60 (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 | 00000000000C130 |