Functionally obsolete 

1,474

Structurally deficient 

429

Aluminum, Wrought iron, or Cast iron

13

Concrete

645

Concrete continuous

1,620

Prestressed concrete

3,665

Prestressed concrete continuous

371

Steel

964

Steel continuous

241

Wood or Timber

652

Highway

7,988

Pedestrian-bicycle

814

Railroad

57

Second level (interchange)

123

Third level (interchange)

9

Other

5

Highway

1,038

Pedestrian-bicycle

29

Railroad

354

Waterway

6,817

Waterway (relief)

129

Other

102

Arch - deck

55

Arch - thru

18

Box beam or Girders - multiple

627

Box beam or Girders - single or spread

68

Channel beam

180

Culvert

378

Frame

307

Girder and Floorbeam system

104

Mixed types

2

Movable - bascule

8

Movable - lift

9

Movable - swing

3

Segmental box girder

3

Slab

2,695

Stringer / Multi-beam or Girder

3,039

Suspension

4

Tee beam

498

Truss - deck

29

Truss - thru

141

Other

3