Functionally obsolete 

2,366

Structurally deficient 

1,533

Aluminum, Wrought iron, or Cast iron

269

Concrete

2,993

Concrete continuous

2,610

Masonry

50

Prestressed concrete

5,441

Prestressed concrete continuous

1,983

Steel

3,143

Steel continuous

2,087

Wood or Timber

759

Highway

19,218

Pedestrian-bicycle

1,546

Railroad

77

Second level (interchange)

28

Third level (interchange)

3

Other

5

Highway

2,124

Pedestrian-bicycle

18

Railroad

662

Waterway

16,844

Waterway (relief)

8

Other

47

Arch - deck

653

Arch - thru

6

Box beam or Girders - multiple

4,452

Box beam or Girders - single or spread

644

Channel beam

367

Culvert

2,048

Frame

32

Girder and Floorbeam system

130

Movable - bascule

3

Segmental box girder

13

Slab

3,554

Stayed girder

3

Stringer / Multi-beam or Girder

6,342

Tee beam

622

Truss - deck

6

Truss - thru

325

Other

135