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Table 03. EMPLOYEE HOURS worked at Stone Operations

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


 

 

Underground Mines Surface Mines

Year

Underground

Surf at UG

Total

Strip

Dredge

Other

Total

1978

3,736,533

910,730

4,647,263

65,622,643

851,478

-

66,474,121

1979

3,871,446

963,214

4,834,660

69,494,907

997,678

-

70,492,585

1980

3,553,234

836,941

4,390,175

65,778,342

873,708

-

66,652,050

1981

3,149,931

822,918

3,972,849

56,692,442

812,182

-

57,504,624

1982

2,730,503

811,226

3,541,729

26,468,945

269,333

-

26,738,278

1983 1/

2,578,560

728,117

3,306,677

52,143,546

320,188

-

52,463,734

1984

2,862,197

774,821

3,637,018

56,537,983

416,187

-

56,954,170

1985

2,799,062

821,363

3,620,425

58,747,865

580,276

-

59,328,141

1986

2,916,982

726,095

3,643,077

61,245,897

527,495

-

61,773,392

1987

2,885,904

743,435

3,629,339

61,462,075

511,203

-

61,973,278

1988

3,007,123

824,878

3,832,001

60,942,035

384,136

-

61,326,171

1989

3,029,414

830,957

3,860,371

57,909,215

372,017

-

58,281,232

1990

3,123,546

909,863

4,033,409

56,628,199

358,714

-

56,986,913

1991

2,929,923

870,739

3,800,662

51,754,519

211,493

-

51,966,002

1992

3,024,659

904,791

3,929,450

52,625,149

148,559

-

52,773,708

1993

3,092,881

882,066

3,974,947

54,557,746

174,051

-

54,731,797

1994

3,391,409

717,977

4,109,386

57,567,156

195,881

-

57,763,037

1995

3,423,888

624,586

4,048,474

57,718,063

162,031

-

57,880,094

1996

3,438,121

603,153

4,041,274

56,448,940

209,394

-

56,658,334

1997

3,619,880

612,289

4,232,169

57,721,111

157,415

-

57,878,526

1998

3,852,906

634,385

4,487,291

60,585,553

77,462

-

60,663,015

1999

3,905,514

704,183

4,609,697

62,779,296

57,034

-

62,836,330

2000

3,957,707

786,822

4,744,529

63,018,404

65,367

1,844

63,085,615

2001

3,850,874

829,542

4,680,416

62,715,700

78,232

-

62,793,932

2002

3,750,888

901,869

4,652,757

62,550,638

82,790

-

62,633,428

2003

3,699,273

791,960

4,491,233

63,099,914

125,332

-

63,225,246

2004

3,900,525

793,463

4,693,988

65,832,847

76,092

-

65,908,939

2005

4,280,859

815,144

5,096,003

69,430,991

56,611

 

69,487,602

2006

4,308,724

947,646

5,256,370

71,156,840

61,155

-

71,217,995

2007

4,126,528

947,080

5,073,608

68,860,812

67,146

-

68,927,958

 

 

1/ Beginning in 1983, only operator data are available at this level of detail.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 03. EMPLOYEE HOURS worked at Stone Operations

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

71,121,384

724,116

92,198,607

164,044,107

22,506,017

186,550,124

1979

75,327,245

631,402

97,107,907

173,066,554

23,954,264

197,020,818

1980

71,042,225

496,383

92,081,904

163,620,512

23,976,355

187,596,867

1981

61,477,473

382,944

82,996,842

144,857,259

22,041,805

166,899,064

1982

30,280,007

169,091

36,276,597

66,725,695

10,716,137

77,441,832

1983 1/

55,770,411

283,019

70,168,956

126,222,386

20,068,277

146,290,663

1984

60,591,188

328,051

74,338,544

135,257,783

20,797,196

156,054,979

1985

62,948,566

360,940

73,941,891

137,251,397

20,810,480

158,061,877

1986

65,416,469

336,587

72,853,842

138,606,898

21,264,651

159,971,549

1987

65,602,617

399,520

73,677,650

139,679,787

21,008,293

160,688,080

1988

65,158,172

449,463

74,862,975

140,470,610

20,735,582

161,206,192

1989

62,141,603

483,244

74,528,335

137,153,182

21,074,826

158,228,008

1990

61,020,322

433,377

73,794,663

135,248,362

21,000,041

156,248,403

1991

55,766,664

367,723

69,723,952

125,858,339

20,238,578

146,096,917

1992

56,703,158

373,441

68,561,308

125,637,907

20,308,961

145,946,868

1993

58,706,744

347,048

69,693,489

128,747,281

20,377,510

149,124,791

1994

61,872,423

552,503

70,087,122

132,512,048

20,278,723

152,790,771

1995

61,938,568

607,209

72,628,231

135,164,008

20,080,041

155,244,049

1996

60,699,608

692,727

75,053,451

136,445,786

20,251,409

156,697,195

1997

62,110,695

625,072

76,426,346

139,162,113

20,567,253

159,729,366

1998

65,150,306

631,131

77,671,119

143,452,556

21,315,997

164,768,553

1999

67,446,027

542,248

77,966,379

145,954,654

21,817,699

167,772,353

2000

67,830,144

479,723

77,861,674

146,171,541

22,369,717

168,541,258

2001

67,474,348

484,445

76,180,454

144,139,247

21,912,459

166,051,706

2002

67,286,185

480,454

71,962,500

139,729,139

21,997,433

161,726,572

2003

67,716,479

494,256

70,267,551

138,478,286

21,530,831

160,009,117

2004

70,602,927

627,702

71,074,984

142,305,613

21,155,914

163,461,527

2005

74,583,605

624,943

72,091,724

147,300,272

21,319,109

168,619,381

2006

76,474,365

558,100

72,070,847

149,103,312

21,700,178

170,803,490

2007

74,001,566

520,802

69,889,975

144,412,343

22,096,430

166,508,773

 

1/ Beginning in 1983, only operator data are available at this level of detail.