Lake Como RD over Rock Creek 100
Good Condition49 years old100 vehicles/day
Location
| State | Montana |
| County | Ravalli |
| Location | 4m N Darby |
| Carries | Lake Como RD |
| Crosses | Rock Creek 100 |
| Coordinates | 46.08064, -114.18217 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 79.1 ft (24.1 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 30.8 ft (9.4 m) |
| Deck Area | 226.5 sq m |
| Main Spans | 1 |
| Year Built | 1977 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L41704000+03001 |