Montana Website Statistics

All Bridges

  • Total listed Montana bridges: 634
  • Bridges with photos: 368 (58.0%)
  • Bridges with Street View: 174 (27.4%)
  • Bridges with GPS coordinates: 625 (98.6%)

  • Total photos: 1,809

Extant Bridges

  • Extant bridges: 482 (76.0% of all)
  • Bridges with photos: 253 (52.5% of extant)
  • Bridges with Street View: 150 (31.1% of extant)
  • Bridges with GPS coordinates: 476 (98.8% of extant)

Lost Bridges

  • Lost bridges: 126 (19.9% of all)
  • Bridges with photos: 32 (25.4% of lost)
  • Bridges with GPS coordinates: 125 (99.2% of lost)

Oldest Listed Bridges

  1. Brownes Bridge (Old) (Beaverhead County, built 1863, replaced by new bridge)
  2. MRL - Yellowstone River Bridge (Yellowstone County, built 1881, open to traffic)
  3. Morelli Bridge (Lewis and Clark County, built 1881, open to traffic)
  4. Marent Trestle (Missoula County, built 1885, open to traffic)
  5. Fort Benton Bridge (Chouteau County, built 1888, open to pedestrians)
  6. Nixon Bridge (Gallatin County, built 1891, open to traffic)
  7. CR507 Williams Bridge (Gallatin County, built 1892, open to traffic)
  8. 15th Street Bridge (Older) (Cascade County, built 1892, replaced by new bridge)
  9. Van Buren Street Footbridge (Missoula County, built 1892, open to pedestrians)
  10. Big Hole River Bridge (Beaverhead County, built 1892, lost)

By Design

  • Arch: 27 (4.3%)
    • Deck arch: 26 (4.1%)
      • Closed-spandrel arch: 10 (1.6%)
      • Open-spandrel arch: 2 (0.3%)
      • Stone arch: 4 (0.6%)
    • Through arch: 1 (0.2%)
      • Marsh arch: 1 (0.2%)

  • Beam: 65 (10.3%)
    • Stringer: 44 (6.9%)
      • Concrete stringer: 2 (0.3%)
      • Steel stringer: 26 (4.1%)
      • Timber stringer: 14 (2.2%)
    • Concrete tee beam: 21 (3.3%)

  • Culvert: 7 (1.1%)

  • Ferry: 4 (0.6%)

  • Girder: 54 (8.5%)
    • Deck girder: 37 (5.8%)
      • Deck plate girder: 37 (5.8%)
    • Pony/through girder: 10 (1.6%)
      • Pony/through plate girder: 10 (1.6%)

  • Slab: 4 (0.6%)

  • Suspension: 4 (0.6%)
    • Cable-stayed: 1 (0.2%)
    • Wire suspension: 3 (0.5%)

  • Truss: 412 (65.0%)
    • Bedstead pony truss: 1 (0.2%)
      • Bedstead Warren pony truss: 1 (0.2%)
    • Deck truss: 32 (5.0%)
      • Baltimore deck truss: 1 (0.2%)
      • Pratt deck truss: 8 (1.3%)
      • Warren deck truss: 10 (1.6%)
        • Warren deck truss with all verticals: 1 (0.2%)
    • Half-through truss: 1 (0.2%)
      • Pratt half-through truss: 1 (0.2%)
    • Pony truss: 170 (26.8%)
      • Other pony truss: 1 (0.2%)
      • Parker pony truss: 2 (0.3%)
      • Polygonal Warren pony truss: 5 (0.8%)
        • Polygonal Warren pony truss with alternating verticals: 2 (0.3%)
        • Polygonal Warren pony truss with all verticals: 1 (0.2%)
      • Pratt pony truss: 17 (2.7%)
      • Half-hip Pratt pony truss: 2 (0.3%)
      • Queenpost pony truss: 5 (0.8%)
      • Warren pony truss: 35 (5.5%)
        • Warren pony truss with alternating verticals: 5 (0.8%)
        • Warren pony truss with no verticals: 1 (0.2%)
        • Warren pony truss with all verticals: 12 (1.9%)
    • Through truss: 192 (30.3%)
      • Baltimore through truss: 4 (0.6%)
      • Camelback through truss: 5 (0.8%)
      • Double-intersection Warren through truss: 2 (0.3%)
      • Lattice through truss: 3 (0.5%)
        • Triple-intersection lattice through truss: 3 (0.5%)
      • Parker through truss: 21 (3.3%)
      • Pennsylvania through truss: 13 (2.1%)
      • Polygonal Warren through truss: 11 (1.7%)
        • Polygonal Warren through truss with alternating verticals: 5 (0.8%)
      • Pratt through truss: 69 (10.9%)
      • Warren through truss: 19 (3.0%)
        • Warren through truss with alternating verticals: 2 (0.3%)
        • Warren through truss with all verticals: 2 (0.3%)

    • Tunnel: 48 (7.6%)

    • Unknown: 9 (1.4%)