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Table 01. Number of Sand and Gravel Operations

in the United States, by Primary Activity, 1978-2007

 

SURFACE MINES

Year

Strip

Dredge

Total w/o Office

Office

Grand Total

1978

5,559

855

6,414

29

6,443

1979

6,163

870

7,033

25

7,058

1980[1]

6,011

851

6,862

29

6,891

1981

5,743

811

6,554

34

6,588

1982

4,421

692

5,113

41

5,154

1983

4,857

711

5,568

21

5,589

1984

4,984

735

5,719

21

5,740

1985

5,291

755

6,046

38

6,084

1986

5,370

806

6,176

24

6,200

1987

5,391

861

6,252

35

6,287

1988

5,507

864

6,371

44

6,415

1989

5,570

860

6,430

43

6,473

1990

5,640

885

6,525

40

6,565

1991

5,645

879

6,524

39

6,563

1992

5,394

879

6,273

43

6,316

1993

5,345

858

6,203

36

6,239

1994

5,299

863

6,162

37

6,199

1995

5,197

824

6,021

31

6,052

1996

5,194

796

5,990

36

6,026

1997

5,385

777

6,162

39

6,201

1998

5,630

773

6,403

40

6,443

1999

5,953

784

6,737

46

6,783

2000

6,198

776

6,974

72

7,046

2001

6,324

745

7,069

62

7,131

2002

6,307

745

7,052

73

7,125

2003

6,258

755

7,013

57

7,070

2004

6,198

806

7,004

70

7,074

2005

6,238

806

7,044

67

7,111

2006

6,288

811

7,099

79

7,178

2007

6,313

812

7,125

74

7,199

 



[1] Beginning in 1980, independent contractors working on mine property performing mine exploration, development, production, maintenance, repair and construction work were assigned an identification number, and reported to MSHA, and are included in the count of operations. Since 1983, the contractors were separated from the mines.