US 87 over Boyd Creek
Fair Condition84 years old2,831 vehicles/day
Location
| State | Montana |
| County | Fergus |
| Location | 1m E Lewistown |
| Carries | US 87 |
| Crosses | Boyd Creek |
| Coordinates | 47.06986, -109.38503 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 57.1 ft (17.4 m) |
| Max Span | 19.0 ft (5.8 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 158.3 sq m |
| Main Spans | 3 |
| Year Built | 1942 |
Traffic
| Avg Daily Traffic | 2,831 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00057084+02521 |