Functionally obsolete 

1,761

Structurally deficient 

256

Aluminum, Wrought iron, or Cast iron

43

Concrete

3,646

Concrete continuous

744

Prestressed concrete

5,920

Prestressed concrete continuous

210

Steel

894

Steel continuous

585

Wood or Timber

425

Other

2

Highway

11,469

Pedestrian-bicycle

3,194

Railroad

22

Second level (interchange)

811

Third level (interchange)

43

Fourth level (interchange)

8

Other

2

Highway

3,343

Pedestrian-bicycle

32

Railroad

509

Waterway

8,768

Waterway (relief)

199

Other

178

Arch - deck

52

Arch - thru

5

Box beam or Girders - multiple

22

Box beam or Girders - single or spread

179

Channel beam

384

Culvert

2,421

Frame

32

Girder and Floorbeam system

39

Movable - bascule

132

Movable - lift

3

Movable - swing

10

Segmental box girder

80

Slab

3,325

Stayed girder

4

Stringer / Multi-beam or Girder

5,358

Suspension

2

Tee beam

294

Truss - deck

1

Truss - thru

108

Other

18