Functionally obsolete 

855

Structurally deficient 

497

Aluminum, Wrought iron, or Cast iron

67

Concrete

2,311

Concrete continuous

451

Masonry

29

Prestressed concrete

1,686

Prestressed concrete continuous

934

Steel

2,429

Steel continuous

730

Wood or Timber

360

Other

3

Building or plaza

8

Highway

8,174

Pedestrian-bicycle

1,695

Railroad

161

Second level (interchange)

531

Third level (interchange)

12

Fourth level (interchange)

4

Other

3

Highway

1,513

Pedestrian-bicycle

46

Railroad

323

Waterway

7,323

Waterway (relief)

19

Other

64

Arch - deck

43

Arch - thru

28

Box beam or Girders - multiple

436

Box beam or Girders - single or spread

403

Culvert

1,932

Frame

175

Girder and Floorbeam system

117

Segmental box girder

17

Slab

389

Stringer / Multi-beam or Girder

3,955

Suspension

2

Tee beam

1,386

Truss - deck

8

Truss - thru

107

Other

2