New Hampshire Website Statistics

All Bridges

  • Total listed New Hampshire bridges: 539
  • Bridges with photos: 368 (68.3%)
  • Bridges with Street View: 237 (44.0%)
  • Bridges with GPS coordinates: 537 (99.6%)

  • Total photos: 5,912

Extant Bridges

  • Extant bridges: 437 (81.1% of all)
  • Bridges with photos: 284 (65.0% of extant)
  • Bridges with Street View: 210 (48.1% of extant)
  • Bridges with GPS coordinates: 435 (99.5% of extant)

Lost Bridges

  • Lost bridges: 93 (17.3% of all)
  • Bridges with photos: 65 (69.9% of lost)
  • Bridges with GPS coordinates: 93 (100.0% of lost)

Oldest Listed Bridges

  1. Highbridge (Hillsborough County, built 1820, open to traffic)
  2. Amoskeag Bridge (Hillsborough County, built 1825, destroyed by flood)
  3. Taylor Falls Covered Bridge (Hillsborough County, built 1827, replaced by new bridge)
  4. Bath/Haverhill Covered Bridge 29-05-04 (Grafton County, built 1827, open to pedestrians)
  5. Thompson Covered Bridge 29-03-04 (Cheshire County, built 1832, open to traffic)
  6. Bath Bridge 29-05-03 (Grafton County, built 1832, open to traffic)
  7. Weirs Channel Bridge (1833) 29-01-P01x (Belknap County, built 1833, replaced by new bridge)
  8. Pemigewasset River Central Steet Bridge (Grafton County, built 1836, replaced by new bridge)
  9. Coombs Covered Bridge 29-03-03 (Cheshire County, built 1837, open to traffic)
  10. Waterloo Covered Bridge 29-07-04 (Merrimack County, built 1840, open to traffic)

By Design

  • Arch: 113 (21.0%)
    • Deck arch: 106 (19.7%)
      • Closed-spandrel arch: 6 (1.1%)
      • Luten arch: 1 (0.2%)
      • Open-spandrel arch: 1 (0.2%)
      • Steel arch: 1 (0.2%)
      • Stone arch: 55 (10.2%)
    • Through arch: 6 (1.1%)
      • Steel through arch: 6 (1.1%)

  • Beam: 79 (14.7%)
    • Stringer: 75 (13.9%)
      • Concrete stringer: 1 (0.2%)
      • Steel stringer: 10 (1.9%)
      • Timber stringer: 62 (11.5%)
    • Concrete tee beam: 4 (0.7%)

  • Culvert: 3 (0.6%)
    • Concrete culvert: 2 (0.4%)
    • Stone culvert: 1 (0.2%)

  • Rigid frame: 10 (1.9%)
    • Concrete rigid frame: 8 (1.5%)
    • Steel rigid frame: 1 (0.2%)

  • Girder: 66 (12.2%)
    • Deck girder: 30 (5.6%)
      • Deck plate girder: 28 (5.2%)
    • Pony/through girder: 33 (6.1%)
      • Pony/through plate girder: 33 (6.1%)

  • Other: 2 (0.4%)

  • Slab: 8 (1.5%)

  • Suspension: 5 (0.9%)
    • Wire suspension: 4 (0.7%)

  • Truss: 248 (46.0%)
    • Deck truss: 35 (6.5%)
      • Baltimore deck truss: 2 (0.4%)
      • Double-intersection Warren deck truss: 2 (0.4%)
      • Lattice deck truss: 2 (0.4%)
      • Lenticular deck truss: 2 (0.4%)
      • Pratt deck truss: 5 (0.9%)
      • Warren deck truss: 16 (3.0%)
        • Warren deck truss with alternating verticals: 4 (0.7%)
        • Warren deck truss with all verticals: 6 (1.1%)
    • Modern truss: 2 (0.4%)
      • Modern through truss: 1 (0.2%)
        • Modern polygonal Warren pony truss: 1 (0.2%)
      • Modern through truss: 1 (0.2%)
        • Modern Pratt through truss: 1 (0.2%)
    • Pony truss: 27 (5.0%)
      • Bailey pony truss: 1 (0.2%)
      • Double-intersection Warren pony truss: 2 (0.4%)
      • Howe pony truss: 3 (0.6%)
      • Lenticular pony truss: 3 (0.6%)
      • Other pony truss: 1 (0.2%)
      • Parker pony truss: 1 (0.2%)
      • Polygonal Warren pony truss: 2 (0.4%)
        • Polygonal Warren pony truss with all verticals: 1 (0.2%)
      • Pratt pony truss: 4 (0.7%)
      • Truesdell pony truss: 1 (0.2%)
      • Warren pony truss: 7 (1.3%)
        • Warren pony truss with alternating verticals: 3 (0.6%)
        • Warren pony truss with no verticals: 1 (0.2%)
        • Warren pony truss with all verticals: 2 (0.4%)
    • Through truss: 184 (34.1%)
      • Baltimore through truss: 18 (3.3%)
      • Bowstring through truss: 3 (0.6%)
      • Burr arch-truss: 1 (0.2%)
      • Childs through truss: 1 (0.2%)
      • Double-intersection Warren through truss: 5 (0.9%)
      • Howe through truss: 6 (1.1%)
      • Lattice through truss: 34 (6.3%)
        • Quadrangular lattice through truss: 1 (0.2%)
        • Town lattice truss: 30 (5.6%)
      • Lenticular through truss: 4 (0.7%)
      • Long through truss: 6 (1.1%)
      • Multiple Kingpost through truss: 5 (0.9%)
      • Other through truss: 2 (0.4%)
      • Paddleford through truss: 14 (2.6%)
      • Parker through truss: 7 (1.3%)
      • Pennsylvania through truss: 4 (0.7%)
      • Pratt through truss: 27 (5.0%)
      • Queenpost through truss: 3 (0.6%)
      • Warren through truss: 27 (5.0%)
        • Warren through truss with alternating verticals: 1 (0.2%)
        • Warren through truss with no verticals: 2 (0.4%)
        • Warren through truss with all verticals: 14 (2.6%)

    • Unknown: 5 (0.9%)