Durnam Road over Gallatin River
Fair Condition56 years old99 vehicles/day
Location
| State | Montana |
| County | Gallatin |
| Location | Durnam Bridge |
| Carries | Durnam Road |
| Crosses | Gallatin River |
| Coordinates | 45.32366, -111.17511 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Steel |
| Design | Truss - Thru |
| Total Length | 76.1 ft (23.2 m) |
| Max Span | 76.1 ft (23.2 m) |
| Deck Width | 18.0 ft (5.5 m) |
| Deck Area | 127.6 sq m |
| Main Spans | 1 |
| Year Built | 1970 (reconstructed 1995) |
Traffic
| Avg Daily Traffic | 99 |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | U.S. Forest Service |
| Historical Significance | Historical significance is not determined |
| Structure Number | 011106000000077 |