Hillbrooke AVE over Big Ditch 198
Good Condition20 years old100 vehicles/day
Location
| State | Montana |
| County | Yellowstone |
| Location | Laurel-hillbrooke AVE |
| Carries | Hillbrooke AVE |
| Crosses | Big Ditch 198 |
| Coordinates | 45.68348, -108.75622 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 34.1 ft (10.4 m) |
| Max Span | 32.2 ft (9.8 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 94.6 sq m |
| Main Spans | 1 |
| Year Built | 2006 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | M56069000+00901 |