Functionally obsolete 

3,133

Structurally deficient 

1,157

Aluminum, Wrought iron, or Cast iron

36

Concrete

5,125

Concrete continuous

637

Masonry

31

Prestressed concrete

4,473

Prestressed concrete continuous

1,374

Steel

2,122

Steel continuous

706

Wood or Timber

128

Other

8

Building or plaza

1

Highway

14,266

Pedestrian-bicycle

96

Railroad

319

Second level (interchange)

2

Third level (interchange)

3

Fourth level (interchange)

2

Other

13

Highway

1,982

Pedestrian-bicycle

6

Railroad

562

Waterway

12,454

Waterway (relief)

9

Other

35

Arch - deck

43

Arch - thru

11

Box beam or Girders - multiple

3,640

Box beam or Girders - single or spread

426

Channel beam

204

Culvert

3,038

Frame

19

Girder and Floorbeam system

156

Segmental box girder

3

Slab

340

Stayed girder

2

Stringer / Multi-beam or Girder

4,296

Suspension

2

Tee beam

2,330

Truss - deck

9

Truss - thru

118

Other

3