Year

Underground Mines

Surface Mines

Underground

Surf at UG

Total

Strip

Auger

Culm Bank

Dredge

Total

NDLs

IR

NDLs

IR

NDLs

IR

NDLs

IR

NDLs

IR

NDLs

IR

NDLs

IR

NDLs

IR

1978

2,589

2.67

385

3.27

2,974

2.74

1,584

2.46

10

2.73

12

6.35

-

-

1,606

2.47

1979

2,316

2.01

350

2.64

2,666

2.08

1,202

1.77

9

3.01

6

2.74

1

3.46

1,218

1.78

1980

2,085

1.87

305

2.38

2,390

1.92

935

1.38

3

1.38

13

5.85

1

2.13

952

1.40

1981

1,642

1.64

257

2.21

1,899

1.70

850

1.30

3

1.51

18

8.66

-

-

871

1.32

1982

1,813

1.79

246

2.14

2,059

1.83

788

1.25

-

-

9

3.32

-

-

797

1.25

1983

1,378

1.77

157

1.68

1,535

1.76

734

1.27

7

2.45

2

.90

-

-

743

1.27

1984

1,399

1.66

164

1.69

1,563

1.67

724

1.15

2

.73

3

1.23

-

-

729

1.14

1985

1,371

1.69

169

1.73

1,540

1.69

696

1.19

-

-

5

2.13

1

1.59

702

1.19

1986

1,573

2.08

171

1.80

1,744

2.05

725

1.33

-

-

2

.68

-

-

727

1.31

1987

2,412

3.45

254

3.05

2,666

3.41

1,039

1.98

5

1.14

1

.31

1

1.33

1,046

1.96

1988

2,418

3.62

272

3.39

2,690

3.59

955

1.89

5

1.03

1

.34

-

-

961

1.87

1989

2,147

3.29

243

2.95

2,390

3.25

1,117

2.22

17

3.88

6

1.78

1

1.00

1,141

2.23

1990

1,955

2.87

259

2.99

2,214

2.89

840

1.63

12

2.87

3

.76

-

-

855

1.63

1991

1,913

3.07

219

2.65

2,132

3.02

728

1.54

20

4.53

8

2.12

3

4.25

759

1.58

1992

1,685

2.90

210

2.58

1,895

2.87

712

1.54

12

3.00

12

2.80

-

-

736

1.56

1993

1,468

3.00

159

2.06

1,627

2.87

592

1.38

5

1.16

15

2.82

-

-

612

1.39

1994

1,518

2.96

164

2.16

1,682

2.86

585

1.34

6

1.28

18

3.87

1

2.04

610

1.36

1995

1,365

2.83

183

2.61

1,548

2.81

473

1.18

7

1.52

17

3.68

-

-

497

1.21

1996

1,309

2.80

147

2.13

1,456

2.71

422

1.08

9

1.55

12

2.69

-

-

443

1.10

1997

1,327

2.89

139

2.01

1,466

2.77

426

1.07

8

1.28

10

2.16

1

1.37

445

1.09

1998

1,276

2.89

136

2.10

1,412

2.79

399

1.02

5

.85

6

1.39

4

2.08

414

1.02

1999

1,002

2.49

89

1.53

1,091

2.36

342

.92

2

.34

7

2.20

-

-

351

.92

2000

959

2.57

94

1.64

1,053

2.44

347

.99

5

1.01

3

.83

7

7.31

362

1.01

2001

1,041

2.61

106

1.83

1,147

2.51

351

.91

1

.17

2

.57

-

-

354

.89

2002

929

2.49

68

1.23

997

2.33

323

.86

3

.51

2

.64

-

-

328

.85

2003

807

2.22

79

1.51

886

2.14

307

.86

9

1.95

1

.30

-

-

317

.86

2004

930

2.38

92

1.70

1,022

2.30

302

.78

7

1.28

1

.23

-

-

310

.78

2005

958

2.21

82

1.40

1,040

2.12

342

.82

14

2.07

3

.54

-

-

359

.83

2006

973

2.14

92

1.46

1,065

2.06

370

.85

8

1.09

3

.52

-

-

381

.84

2007

900

1.99

87

1.39

987

1.91

304

.71

7

1.06

1

.15

1

1.77

313

.71

Year

Total Mining

Indp Shops/Yrds

Prep Plants

Total w/o Office

Office

Grand Total

NDLs

IR

NDLs

IR

NDLs

IR

NDLs

IR

NDLs

IR

NDLs

IR

1978

4,580

2.64

112

3.62

600

3.59

5,292

2.74

17

.22

5,309

2.64

1979

3,884

1.97

77

2.03

517

2.54

4,478

2.03

16

.18

4,494

1.96

1980

3,342

1.74

58

1.63

454

2.15

3,854

1.78

16

.17

3,870

1.71

1981

2,770

1.56

41

1.39

327

1.58

3,138

1.56

7

.07

3,145

1.49

1982

2,856

1.62

31

1.12

238

1.17

3,125

1.57

14

.14

3,139

1.50

1983

2,278

1.57

20

.78

216

1.24

2,514

1.52

13

.14

2,527

1.44

1984

2,292

1.45

25

1.02

232

1.22

2,549

1.42

6

.06

2,555

1.36

1985

2,242

1.49

33

1.74

234

1.25

2,509

1.47

11

.12

2,520

1.40

1986

2,471

1.76

32

1.96

247

1.39

2,750

1.72

11

.13

2,761

1.64

1987

3,712

2.82

44

3.35

400

2.37

4,156

2.78

26

.33

4,182

2.65

1988

3,651

2.89

39

3.58

402

2.40

4,092

2.84

10

.13

4,102

2.70

1989

3,531

2.83

35

3.72

433

2.50

3,999

2.80

19

.24

4,018

2.66

1990

3,069

2.38

48

4.42

384

2.16

3,501

2.37

12

.16

3,513

2.26

1991

2,891

2.44

48

4.50

330

1.93

3,269

2.39

13

.18

3,282

2.28

1992

2,631

2.32

34

3.43

281

1.71

2,946

2.26

13

.18

2,959

2.14

1993

2,239

2.23

43

5.06

260

1.77

2,542

2.19

35

.50

2,577

2.09

1994

2,292

2.21

28

3.42

288

1.82

2,608

2.17

5

.07

2,613

2.06

1995

2,045

2.12

21

2.91

241

1.67

2,307

2.07

9

.14

2,316

1.96

1996

1,899

2.02

11

1.89

241

1.69

2,151

1.98

7

.12

2,158

1.88

1997

1,911

2.04

14

2.98

206

1.49

2,131

1.97

3

.05