Table 03. Average Number of
Employees at Bituminous 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
|
127,608
|
15,834
|
143,442
|
72,938
|
1,059
|
155
|
14
|
74,166
|
1979
|
132,512
|
15,939
|
148,451
|
72,181
|
636
|
141
|
37
|
72,995
|
1980
|
126,743
|
15,424
|
142,167
|
69,358
|
584
|
158
|
62
|
70,162
|
1981
|
121,220
|
15,525
|
136,745
|
70,546
|
793
|
150
|
111
|
71,600
|
1982
|
118,247
|
14,025
|
132,272
|
68,560
|
597
|
237
|
100
|
69,494
|
19831
|
88,561
|
9,880
|
98,441
|
56,743
|
446
|
120
|
89
|
57,389
|
1984
|
92,231
|
9,849
|
102,080
|
59,476
|
438
|
140
|
83
|
60,137
|
1985
|
87,423
|
9,476
|
96,899
|
55,421
|
481
|
104
|
82
|
56,088
|
1986
|
81,236
|
9,178
|
90,414
|
52,273
|
382
|
166
|
68
|
52,889
|
1987
|
74,134
|
8,156
|
82,290
|
49,265
|
648
|
179
|
82
|
50,174
|
1988
|
70,472
|
7,806
|
78,278
|
46,257
|
720
|
209
|
86
|
47,272
|
1989
|
67,981
|
7,503
|
75,484
|
43,905
|
699
|
222
|
101
|
44,927
|
1990
|
68,851
|
7,510
|
76,361
|
44,266
|
616
|
203
|
93
|
45,178
|
1991
|
62,427
|
6,934
|
69,361
|
40,796
|
563
|
171
|
86
|
41,616
|
1992
|
57,768
|
6,349
|
64,117
|
37,964
|
754
|
166
|
60
|
38,944
|
1993
|
49,525
|
5,682
|
55,207
|
34,633
|
508
|
170
|
41
|
35,352
|
1994
|
51,099
|
5,171
|
56,270
|
35,091
|
673
|
167
|
55
|
35,986
|
1995
|
46,929
|
4,581
|
51,510
|
32,176
|
665
|
137
|
46
|
33,024
|
1996
|
44,256
|
4,209
|
48,465
|
29,664
|
792
|
117
|
53
|
30,626
|
1997
|
42,924
|
4,059
|
46,983
|
29,485
|
815
|
123
|
60
|
30,483
|
1998
|
40,938
|
3,887
|
44,825
|
28,430
|
839
|
138
|
77
|
29,484
|
1999
|
37,114
|
3,494
|
40,608
|
27,078
|
820
|
95
|
79
|
28,072
|
2000
|
34,131
|
3,222
|
37,353
|
24,688
|
648
|
138
|
92
|
25,566
|
2001
|
35,516
|
3,266
|
38,782
|
26,811
|
717
|
160
|
72
|
27,760
|
2002
|
34,278
|
3,009
|
37,287
|
27,064
|
734
|
147
|
56
|
28,001
|
2003
|
32,098
|
2,706
|
34,804
|
25,956
|
561
|
149
|
61
|
26,727
|
2004
|
33,399
|
2,613
|
36,012
|
26,928
|
624
|
225
|
56
|
27,833
|
2005
|
36,611
|
2,646
|
39,257
|
28,579
|
680
|
262
|
37
|
29,558
|
2006
|
38,162
|
2,844
|
41,006
|
30,118
|
801
|
271
|
35
|
31,225
|
2007
|
37,743
|
2,933
|
40,676
|
28,953
|
779
|
268
|
40
|
30,040
|
1Beginning in 1983, only operator data are available at this
level of detail.
Table 03. Average Number of
Employees at Bituminous Coal
Mines in the United States,
by Primary Activity, 1978-2007 ā continued:
Year
|
Total
Mining
|
Indp Shops/Yrds
|
Prep
Plants
|
Total
w/o Office
|
Office
|
Grand
Total
|
1978
|
217,608
|
3,850
|
21,142
|
242,600
|
9,811
|
252,411
|
1979
|
221,446
|
3,972
|
22,136
|
247,554
|
10,098
|
257,652
|
1980
|
212,329
|
3,725
|
22,801
|
238,855
|
10,744
|
249,599
|
1981
|
208,345
|
3,411
|
23,302
|
235,058
|
11,059
|
246,117
|
1982
|
201,766
|
3,173
|
21,690
|
226,629
|
11,285
|
237,914
|
19831
|
155,839
|
2,541
|
16,485
|
174,865
|
10,179
|
185,044
|
1984
|
162,217
|
2,333
|
17,234
|
181,784
|
9,794
|
191,578
|
1985
|
152,987
|
1,996
|
16,291
|
171,274
|
9,309
|
180,583
|
1986
|
143,303
|
1,700
|
15,487
|
160,490
|
8,759
|
169,249
|
1987
|
132,464
|
1,499
|
14,554
|
148,517
|
7,984
|
156,501
|
1988
|
125,550
|
1,108
|
14,334
|
140,992
|
7,761
|
148,753
|
1989
|
120,411
|
1,006
|
14,193
|
135,610
|
7,563
|
143,173
|
1990
|
121,539
|
1,069
|
14,258
|
136,866
|
7,354
|
144,220
|
1991
|
110,977
|
1,073
|
13,525
|
125,575
|
6,859
|
132,434
|
1992
|
103,061
|
954
|
12,727
|
116,742
|
6,568
|
123,310
|
1993
|
90,559
|
850
|
11,214
|
102,623
|
6,355
|
108,978
|
1994
|
92,256
|
848
|
11,529
|
104,633
|
5,995
|
110,628
|
1995
|
84,534
|
684
|
10,403
|
95,621
|
5,596
|
101,217
|
1996
|
79,091
|
531
|
9,875
|
89,497
|
4,971
|
94,468
|
1997
|
77,466
|
466
|
9,275
|
87,207
|
4,779
|
91,986
|
1998
|
74,309
|
472
|
9,005
|
83,786
|
4,264
|
88,050
|
1999
|
68,680
|
439
|
8,282
|
77,401
|
3,787
|
81,188
|
2000
|
62,919
|
508
|
7,640
|
71,067
|
3,405
|
74,472
|
2001
|
66,542
|
497
|
7,940
|
74,979
|
3,482
|
78,461
|
2002
|
65,288
|
456
|
8,015
|
73,759
|
3,345
|
77,104
|
2003
|
61,531
|
457
|
7,497
|
69,485
|
3,268
|
72,753
|
2004
|
63,845
|
420
|
7,746
|
72,011
|
3,350
|
75,361
|
2005
|
68,815
|
412
|
8,066
|
77,293
|
3,507
|
80,800
|
2006
|
72,231
|
418
|
8,341
|
80,990
|
3,595
|
84,585
|
2007
|
70,716
|
430
|
8,166
|
79,312
|
3,597
|
82,909
|
1Beginning
in 1983, only operator data are available at this level of detail.
|