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Table 04. Number of HOURS WORKED at Bituminous Coal Mines in the United States,

by Primary Activity, 1978-2007

 

 

Year

Underground Mines

Surface Mines

 

Underground

Surf at UG

Total

Strip

Auger

Culm Bank

Dredge

Total

1978

193,235,992

23,471,667

216,707,659

127,029,042

731,435

164,581

12,812

127,937,870

1979

229,776,510

26,448,612

256,225,122

133,785,496

598,590

182,740

48,066

134,614,892

1980

222,291,474

25,593,589

247,885,063

132,731,233

435,796

198,404

83,158

133,448,591

1981

200,143,701

23,172,963

223,316,664

128,037,354

397,004

184,400

126,287

128,745,045

1982

201,869,778

22,842,264

224,712,042

123,659,996

467,057

305,547

122,122

124,544,722

19831

153,945,160

17,050,754

170,995,914

107,904,645

387,067

158,357

119,209

108,560,278

1984

166,533,236

17,609,011

184,142,247

117,225,618

380,927

216,459

115,095

117,938,099

1985

160,547,476

16,985,892

177,533,368

107,858,791

482,427

129,303

98,562

108,569,083

1986

149,546,253

16,317,877

165,864,130

100,453,573

342,014

186,271

88,841

101,070,699

1987

138,492,597

14,179,369

152,671,966

95,864,788

676,046

254,723

110,455

96,906,012

1988

132,412,628

13,689,012

146,101,640

90,306,866

807,373

295,651

103,784

91,513,674

1989

128,914,189

13,287,809

142,201,998

88,888,078

694,616

301,646

145,692

90,030,032

1990

133,874,429

13,814,032

147,688,461

90,094,833

628,220

276,079

155,382

91,154,514

1991

122,070,415

12,545,740

134,616,155

81,928,100

644,767

258,789

112,277

82,943,933

1992

113,037,618

11,343,999

124,381,617

77,962,689

664,680

235,803

82,664

78,945,836

1993

94,631,858

9,578,174

104,210,032

71,246,947

602,418

205,919

49,909

72,105,193

1994

99,669,926

9,584,975

109,254,901

72,337,855

732,222

243,726

67,492

73,381,295

1995

93,800,984

8,527,004

102,327,988

65,857,836

744,622

197,632

73,945

66,874,035

1996

90,366,391

7,958,558

98,324,949

62,859,456

971,255

175,295

84,063

64,090,069

1997

88,070,192

7,695,736

95,765,928

62,349,269

1,006,837

195,347

114,785

63,666,238

1998

84,493,917

7,528,340

92,022,257

60,870,299

1,012,564

192,674

145,486

62,221,023

1999

76,863,368

6,759,450

83,622,818

57,045,315

967,434

154,290

121,905

58,288,944

2000

70,323,447

6,224,860

76,548,307

53,007,062

787,858

213,453

121,704

54,130,077

2001

74,366,243

6,311,783

80,678,026

59,284,835

857,652

273,706

141,076

60,557,269

2002

70,266,320

5,971,208

76,237,528

59,520,557

874,721

217,024

88,609

60,700,911

2003

68,630,697

5,541,309

74,172,006

56,246,544

720,531

242,163

102,255

57,311,493

2004

73,363,196

5,404,010

78,767,206

59,916,160

907,695

375,190

84,170

61,283,215

2005

80,738,151

5,632,863

86,371,014

64,806,518

1,096,766

469,252

69,462

66,441,998

2006

85,051,701

5,891,315

90,943,016

67,290,949

1,348,089

488,762

74,800

69,202,600

2007

84,334,300

6,052,305

90,386,605

65,502,976

1,265,912

523,874

54,142

67,346,904

 

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

 


Table 04. Number of HOURS WORKED at Bituminous Coal Mines in the United States,

by Primary Activity, 1978-2007 continued:

 

Year

Total Mining

Indp Shops/Yrds

Prep Plants

Total w/o Office

Office

Grand Total

1978

344,645,529

6,093,756

31,968,035

382,707,320

15,176,698

397,884,018

1979

390,840,014

7,528,448

39,127,465

437,495,927

17,418,305

454,914,232

1980

381,333,654

6,992,875

40,292,120

428,618,649

18,701,177

447,319,826

1981

352,061,709

5,767,038

39,574,890

397,403,637

18,961,303

416,364,940

1982

349,266,764

5,450,769

38,731,618

393,449,151

19,967,172

413,416,323

19831

279,556,192

4,535,316

30,554,596

314,646,104

17,790,464

332,436,568

1984

302,080,346

4,205,793

33,940,085

340,226,224

17,501,838

357,728,062

1985

286,102,451

3,705,027

32,405,332

322,212,810

16,831,993

339,044,803

1986

266,934,829

3,163,855

30,938,800

301,037,484

15,719,416

316,756,900

1987

249,577,978

2,548,608

29,550,968

281,677,554

14,635,079

296,312,633

1988

237,615,314

2,094,633

29,533,043

269,242,990

14,086,263

283,329,253

1989

232,232,030

1,806,627

29,412,739

263,451,396

13,861,911

277,313,307

1990

238,842,975

2,094,060

29,642,734

270,579,769

13,343,412

283,923,181

1991

217,560,088

2,060,562

27,561,982

247,182,632

12,407,931

259,590,563

1992

203,327,453

1,863,873

26,022,684

231,214,010

11,872,397

243,086,407

1993

176,315,225

1,579,713

22,740,240

200,635,178

11,021,443

211,656,621

1994

182,636,196

1,564,874

23,701,076

207,902,146

10,971,235

218,873,381

1995

169,202,023

1,271,805

21,776,088

192,249,916

10,121,743

202,371,659

1996

162,415,018

1,016,098

21,129,492

184,560,608

9,266,311

193,826,919

1997

159,432,166

916,011

20,238,697

180,586,874

8,746,897

189,333,771

1998

154,243,280

936,650

19,133,277

174,313,207

7,860,320

182,173,527

1999

141,911,762

932,378

17,433,532

160,277,672

6,942,610

167,220,282

2000

130,678,384

1,098,122

16,450,673

148,227,179

6,285,584

154,512,763

2001

141,235,295

1,072,686

17,330,790

159,638,771

6,523,645

166,162,416

2002

136,938,439

941,056

17,384,343

155,263,838

6,456,568

161,720,406

2003

131,483,499

922,669

16,607,646

149,013,814

6,024,906

155,038,720

2004

140,050,421

945,335

17,257,924

158,253,680

6,180,949

164,434,629

2005

152,813,012

981,410

18,666,962

172,461,384

6,782,096

179,243,480

2006

160,145,616

978,262

18,953,581

180,077,459

6,905,109

186,982,568

2007

157,733,509

988,900

18,565,671

177,288,080

7,088,668

184,376,748

 

 

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