Functionally obsolete 

459

Structurally deficient 

411

Aluminum, Wrought iron, or Cast iron

4

Concrete

1,138

Concrete continuous

122

Prestressed concrete

1,693

Prestressed concrete continuous

77

Steel

696

Steel continuous

163

Wood or Timber

552

Highway

4,256

Pedestrian-bicycle

317

Second level (interchange)

187

Third level (interchange)

2

Highway

461

Pedestrian-bicycle

11

Railroad

95

Waterway

3,925

Waterway (relief)

5

Other

28

Arch - deck

16

Arch - thru

2

Box beam or Girders - multiple

161

Box beam or Girders - single or spread

56

Channel beam

35

Culvert

134

Frame

576

Girder and Floorbeam system

51

Movable - lift

1

Segmental box girder

1

Slab

196

Stringer / Multi-beam or Girder

2,230

Suspension

2

Tee beam

886

Truss - deck

9

Truss - thru

86

Other

3