- "S" Bridges (2)
- 2-panel truss (3)
- 3-panel truss (19)
- 4-panel truss (45)
- 5-panel truss (100)
- 6-panel truss (121)
- 7-panel truss (96)
- 8-panel truss (88)
- 9-panel truss (44)
- 10-panel truss (53)
- 11-panel truss (15)
- 12-panel truss (13)
- 14-panel truss (7)
- 16-panel truss (2)
- 18-panel truss (2)
- Aluminum (1)
- Aqueduct (2)
- Arch (7,648)
- Bailey truss (2)
- Baltimore truss (45)
- Balustrade (1)
- Bascule (445)
- Beam (1,730)
- Bedstead truss (33)
- Bowstring truss (73)
- Brick arch (7)
- Bridge demolished and replaced with a new concrete deck girder bridge
- Brown truss (1)
- Burr arch-truss (127)
- Cable-stayed (25)
- Camelback truss (73)
- Cantilevered truss (125)
- Childs truss (8)
- Closed-spandrel arch (1,144)
- Concrete balustrade (80)
- Concrete girder (65)
- Concrete inset railing (34)
- Concrete pony arch (26)
- Concrete tee beam (167)
- Concrete truss (1)
- Corrugated deck (522)
- Covered (539)
- Culvert (19)
- Curved (28)
- Dam (3)
- Deck arch (6,730)
- Deck girder (139)
- Deck truss (549)
- Dismantled (1)
- Double decker (16)
- Double decker.
- Double-barreled (1)
- Double-intersection Warren truss (22)
- Eyebar suspension (5)
- Ferry (16)
- Footbridge (23)
- Girder (267)
- HAER documented (348)
- Half-hip (21)
- Haupt truss (1)
- Hog trough (3)
- Howe truss (100)
- Inclined upper chord (4)
- International (4)
- Inverted bowstring truss (3)
- K-Parker truss (3)
- K-Truss (3)
- Kingpost truss (24)
- Laced endposts (9)
- Lannon Stone (26)
- Lattice truss (58)
- Lenticular truss (22)
- Long truss (6)
- Low water crossing (3)
- Milwaukee Movable Bridges (24)
- Movable (858)
- Multiple Kingpost truss (48)
- Mystery (44)
- National Road (1)
- No guardrails (20)
- Open-spandrel arch (221)
- Over a mile long (99)
- Paddleford truss (4)
- Parker truss (448)
- Partridge truss (5)
- Pegram truss (4)
- Pennsylvania truss (121)
- Pin-connected (483)
- Plate girder (151)
- Polygonal Warren truss (107)
- Pony Plate Girder (1)
- Pony truss (9,490)
- Post truss (2)
- Pratt through truss (2)
- Pratt truss (1,581)
- Queenpost truss (41)
- Rail-to-road (15)
- Rail-to-trail (46)
- Railroad overpass (48)
- Rainbow arch (158)
- Recycled Bridge (4)
- Relocated (143)
- Replaced (2)
- Replaced superstructure (1)
- Riveted (374)
- Riveted truss (2)
- Self-anchored (3)
- Skewed (2)
- Skewed truss (1)
- Slab (6)
- Smith truss (16)
- Span length 25-50 feet (6,167)
- Span length 50-75 feet (4,730)
- Span length 75-100 feet (3,301)
- Span length 100-125 feet (2,301)
- Span length 125-175 feet (2,034)
- Span length 175-250 feet (1,031)
- Span length 250-500 feet (590)
- Span length 500-1000 feet (241)
- Span length over 1000 feet (71)
- Span length under 25 feet (2,606)
- Staircase (1)
- State line crossing (166)
- Stearns truss (4)
- Steel arch (267)
- Steel grate deck (356)
- Steel stringer (415)
- Steel through arch (133)
- Stone arch (1,369)
- Stone piers (3)
- Strauss underneath counterweight bascule (1)
- Subdivided Warren truss (1)
- Suncook.
- Suspension (159)
- Swing (272)
- Thacher truss (3)
- Through girder (83)
- Through truss (5,431)
- Timber pony arch (1)
- Timber stringer (1,037)
- Total length 25-50 feet (5,323)
- Total length 50-75 feet (4,996)
- Total length 75-100 feet (3,378)
- Total length 100-125 feet (2,470)
- Total length 125-175 feet (2,706)
- Total length 175-250 feet (1,844)
- Total length 250-500 feet (2,163)
- Total length 500-1000 feet (1,029)
- Total length 1000-2500 feet (716)
- Total length over 2500 feet (356)
- Total length under 25 feet (979)
- Truss (16,090)
- Tubular piers (17)
- Tunnel (265)
- Uncovered wooden truss (4)
- Vertical endposts (5)
- Vertical lift (180)
- Vierendeel truss (3)
- WPA (2)
- Waddell "A" truss (3)
- Warren truss (748)
- Warren-Turner truss (1)
- Water
- Whipple truss (58)
- Wooden deck (5,165)
- Wooden railroad overpass (11)
- Wrought iron (9)