Route 284 over Canyon Ferry Spillway
Fair Condition76 years old600 vehicles/day
Location
| State | Montana |
| County | Lewis and Clark |
| Location | 14 Mi E-ne Of Helena Mt |
| Carries | Route 284 |
| Crosses | Canyon Ferry Spillway |
| Coordinates | 46.64828, -111.72829 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 230.3 ft (70.2 m) |
| Max Span | 57.1 ft (17.4 m) |
| Deck Width | 27.2 ft (8.3 m) |
| Deck Area | 582.7 sq m |
| Main Spans | 4 |
| Year Built | 1950 |
Traffic
| Avg Daily Traffic | 600 (2015) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Reclamation |
| Historical Significance | Historical significance is not determined |
| Structure Number | MTA-CF-001 |