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Table 04. Number of HOURS WORKED at Coal Mines in the United States, by Primary Activity, 1978-2007

 

 

Underground Mines

Surface Mines

 

Year

Underground

Surf at UG

Total

Strip

Auger

Culm Bank

Dredge

Total

1978

193,794,718

23,569,960

217,364,678

128,683,555

731,435

378,060

23,922

129,816,972

1979

230,304,102

26,522,638

256,826,740

135,510,409

598,590

438,467

57,738

136,605,504

1980

222,870,843

25,675,431

248,546,274

135,138,201

435,796

444,437

93,698

136,112,132

1981

200,772,943

23,277,349

224,050,292

130,576,920

397,004

415,581

139,598

131,529,103

1982

202,557,495

22,954,235

225,511,730

126,125,400

467,057

541,853

138,659

127,272,969

1983

155,494,125

18,744,636

174,238,761

115,456,732

570,423

442,954

156,531

116,626,640

1984

168,158,329

19,445,063

187,603,392

126,303,153

549,037

488,186

158,823

127,499,199

1985

162,461,265

19,576,115

182,036,880

116,870,526

648,976

469,398

126,150

118,115,050

1986

151,166,953

19,034,396

170,201,349

109,267,927

608,980

589,878

112,868

110,579,653

1987

139,667,922

16,649,387

156,317,309

105,119,295

878,387

654,963

150,384

106,803,029

1988

133,721,086

16,060,832

149,781,918

100,834,103

969,369

588,348

170,408

102,562,228

1989

130,635,823

16,473,421

147,109,244

100,595,934

875,864

675,184

199,502

102,346,484

1990

136,021,939

17,325,525

153,347,464

102,862,419

836,174

791,649

192,039

104,682,281

1991

124,435,749

16,546,316

140,982,065

94,544,458

882,922

755,464

141,238

96,324,082

1992

116,013,668

16,251,448

132,265,116

92,377,668

799,054

857,272

114,879

94,148,873

1993

97,713,848

15,473,757

113,187,605

86,027,291

862,951

1,064,394

72,118

88,026,754

1994

102,556,106

15,206,980

117,763,086

87,518,041

936,203

929,062

97,912

89,481,218

1995

96,348,584

14,004,507

110,353,091

80,293,088

922,842

924,278

110,028

82,250,236

1996

93,530,286

13,833,572

107,363,858

78,168,209

1,162,645

891,821

174,130

80,396,805

1997

91,949,818

13,802,276

105,752,094

79,634,049

1,253,071

925,869

145,678

81,958,667

1998

88,231,397

12,925,813

101,157,210

78,434,109

1,175,045

862,405

384,511

80,856,070

1999

80,634,251

11,649,426

92,283,677

74,383,657

1,162,466

636,802

163,573

76,346,498

2000

74,680,266

11,480,214

86,160,480

69,984,140

986,363

724,170

191,496

71,886,169

2001

79,876,376

11,583,586

91,459,962

77,412,311

1,196,400

701,888

200,828

79,511,427

2002

74,657,800

11,046,101

85,703,901

75,353,030

1,178,053

629,537

115,243

77,275,863

2003

72,544,051

10,439,060

82,983,111

71,751,200

923,250

656,208

159,600

73,490,258

2004

78,180,620

10,845,491

89,026,111

77,530,926

1,094,013

888,705

109,267

79,622,911

2005

86,535,496

11,711,676

98,247,172

83,608,106

1,351,896

1,117,449

126,243

86,203,694

2006

91,000,929

12,609,265

103,610,194

87,551,261

1,472,123

1,155,870

98,284

90,277,538

2007

90,618,088

12,477,836

103,095,924

85,852,684

1,324,153

1,316,372

112,683

88,605,892

 

 

 

 

 

 

 

 

 

 


 

 

 

Table 04. Number of HOURS WORKED at 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

347,181,650

6,193,667

33,410,981

386,786,298

15,353,676

402,139,974

1979

393,432,444

7,596,878

40,733,250

441,762,372

17,602,290

459,364,662

1980

384,658,406

7,125,512

42,256,815

434,040,733

18,885,019

452,925,752

1981

355,579,395

5,913,029

41,516,747

403,009,171

19,156,127

422,165,298

1982

352,784,699

5,548,130

40,605,536

398,938,365

20,176,412

419,114,777

1983

290,865,401

5,119,037

34,944,666

330,929,104

19,035,543

349,964,647

1984

315,102,591

4,882,467

38,000,431

357,985,489

18,653,649

376,639,138

1985

300,152,430

3,801,682

37,377,939

341,332,051

17,866,726

359,198,777

1986

280,781,002

3,267,174

35,506,051

319,554,227

16,753,243

336,307,470

1987

263,120,338

2,628,954

33,778,861

299,528,153

15,671,298

315,199,451

1988

252,344,146

2,176,951

33,448,509

287,969,606

15,594,848

303,564,454

1989

249,455,728

1,880,450

34,680,089

286,016,267

16,064,992

302,081,259

1990

258,029,745

2,173,931

35,558,200

295,761,876

15,158,441

310,920,317

1991

237,306,147

2,134,856

34,208,799

273,649,802

14,490,454

288,140,256

1992

226,413,989

1,980,216

32,769,984

261,164,189

14,755,195

275,919,384

1993

201,214,359

1,698,221

29,300,457

232,213,037

14,074,802

246,287,839

1994

207,244,304

1,636,126

31,590,791

240,471,221

13,790,888

254,262,109

1995

192,603,327

1,445,750

28,905,698

222,954,775

13,200,912

236,155,687

1996

187,760,663

1,161,384

28,521,022

217,443,069

12,166,183

229,609,252

1997

187,710,761

939,553

27,697,722

216,348,036

12,231,636

228,579,672

1998

182,013,280

1,039,878

27,352,002

210,405,160

11,416,567

221,821,727

1999

168,630,175

1,033,745

25,601,705

195,265,625

10,458,072

205,723,697

2000

158,046,649

1,157,000

24,348,076

183,551,725

9,954,694

193,506,419

2001

170,971,389

1,116,804

26,294,219

198,382,412

10,390,496

208,772,908

2002

162,979,764

1,169,075

26,643,102

190,791,941

9,575,966

200,367,907

2003

156,473,369

1,146,588

25,427,265

183,047,222

9,036,782

192,084,004

2004

168,649,022

1,400,329

26,017,595

196,066,946

8,930,315

204,997,261

2005

184,450,866

1,649,101

28,539,629

214,639,596

9,681,799

224,321,395

2006

193,887,732

1,626,953

30,453,014

225,967,699

9,178,375

235,146,074

2007

191,701,816

1,618,756

28,762,239

222,082,811

9,929,407

232,012,218

 

 

All numbers include contractors.