Functionally obsolete 

4,531

Structurally deficient 

1,928

Aluminum, Wrought iron, or Cast iron

143

Concrete

2,850

Concrete continuous

617

Masonry

112

Prestressed concrete

2,790

Prestressed concrete continuous

136

Steel

10,063

Steel continuous

1,525

Wood or Timber

455

Other

26

Building or plaza

8

Highway

17,502

Pedestrian-bicycle

3,761

Railroad

854

Second level (interchange)

18

Third level (interchange)

13

Fourth level (interchange)

1

Other

80

Highway

5,765

Pedestrian-bicycle

54

Railroad

1,209

Waterway

12,243

Waterway (relief)

2

Other

216

Arch - deck

666

Arch - thru

22

Box beam or Girders - multiple

2,204

Box beam or Girders - single or spread

52

Channel beam

12

Culvert

2,033

Frame

1,027

Girder and Floorbeam system

1,018

Mixed types

3

Movable - bascule

33

Movable - lift

26

Movable - swing

12

Orthotropic

8

Segmental box girder

7

Slab

1,012

Stayed girder

1

Stringer / Multi-beam or Girder

9,701

Suspension

19

Tee beam

173

Truss - deck

34

Truss - thru

572

Other

82