Skip to content


 

Table 01. Number of Metal/Nonmetal [1]Operations in the United States, by Primary Activity, 1978-2007

 

 

 

Year

Underground Mines

Surface Mines

 

Underground

Surf at UG

Total

Strip

Dredge

Other

Total

1978

670

28

698

10,329

889

28

11,246

1979

679

32

711

11,127

900

21

12,048

1980[2]

777

35

812

11,036

877

13

11,926

1981

786

54

840

10,579

834

2

11,415

1982

697

52

749

8,485

712

3

9,200

1983

578

46

624

9,187

731

1

9,919

1984

669

14

683

10,862

820

1

11,683

1985

459

28

487

9,715

779

1

10,495

1986

420

34

454

9,544

831

1

10,376

1987

405

28

433

9,565

887

-

10,452

1988

399

28

427

9,760

886

-

10,646

1989

394

25

419

9,785

883

-

10,668

1990

376

18

394

9,859

908

-

10,767

1991

316

25

341

9,750

896

-

10,646

1992

290

22

312

9,457

897

-

10,354

1993

276

7

283

9,404

876

3

10,283

1994

276

12

288

9,303

882

33

10,218

1995

266

11

277

9,190

842

31

10,063

1996

248

15

263

9,177

814

23

10,014

1997

246

16

262

9,421

794

23

10,238

1998

249

15

264

9,767

786

17

10,570

1999

256

11

267

10,238

796

14

11,048

2000

248

14

262

10,627

793

16

11,436

2001

221

14

235

10,874

765

10

11,649

2002

220

8

228

10,855

761

12

11,628

2003

221

11

232

10,822

772

11

11,605

2004

234

8

242

10,825

823

13

11,661

2005

238

9

247

10,950

824

18

11,792

2006

244

12

256

11,085

825

18

11,928

2007

238

18

256

11,174

826

14

12,014

 


 

Table 01. Number of Metal/Nonmetal1Operations in the United States, by Primary Activity, 1978-2007 continued:

 

 

Year

Total Mining

Indp Shops/Yrds

Mills

Total w/o Office

Office

Grand Total

1978

11,944

48

865

12,857

66

12,923

1979

12,759

43

868

13,670

62

13,732

1980

12,738

36

728

13,502

64

13,566

1981

12,255

33

773

13,061

82

13,143

1982

9,949

30

770

10,749

135

10,884

1983

10,543

27

720

11,290

94

11,384

1984

12,366

25

725

13,116

30

13,146

1985

10,982

26

703

11,711

121

11,832

1986

10,830

22

650

11,502

79

11,581

1987

10,885

21

629

11,535

79

11,614

1988

11,073

23

617

11,713

95

11,808

1989

11,087

21

574

11,682

83

11,765

1990

11,161

21

576

11,758

80

11,838

1991

10,987

20

554

11,561

81

11,642

1992

10,666

18

530

11,214

80

11,294

1993

10,566

18

548

11,132

69

11,201

1994

10,506

22

488

11,016

77

11,093

1995

10,340

23

490

10,853

60

10,913

1996

10,277

22

481

10,780

63

10,843

1997

10,500

20

490

11,010

63

11,073

1998

10,834

17

486

11,337

72

11,409

1999

11,315

15

480

11,810

77

11,887

2000

11,698

13

466

12,177

112

12,289

2001

11,884

14

465

12,363

116

12,479

2002

11,856

15

456

12,327

128

12,455

2003

11,837

16

447

12,300

119

12,419

2004

11,903

18

429

12,350

117

12,467

2005

12,039

17

430

12,486

117

12,603

2006

12,184

19

429

12,632

140

12,772

2007

12,270

20

425

12,715

126

12,841

 

 

 

 



[1] Includes stone, sand and gravel operations.

[2] 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.