Ross Fork Road over Middle Fork Rock CR 021
Good Condition35 years old100 vehicles/day
Location
| State | Montana |
| County | Granite |
| Location | 15m SW Phillipsburg |
| Carries | Ross Fork Road |
| Crosses | Middle Fork Rock CR 021 |
| Coordinates | 46.18411, -113.50192 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 82.0 ft (25 m) |
| Max Span | 80.1 ft (24.4 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 200 sq m |
| Main Spans | 1 |
| Year Built | 1991 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L20067000+04001 |