Table 01. Number of 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
|
135
|
4
|
139
|
3,473
|
21
|
-
|
3,494
|
|
1979
|
133
|
2
|
135
|
3,687
|
21
|
-
|
3,708
|
|
1980
|
134
|
1
|
135
|
3,716
|
15
|
-
|
3,731
|
|
1981
|
128
|
5
|
133
|
3,723
|
16
|
-
|
3,739
|
|
1982
|
122
|
5
|
127
|
3,085
|
12
|
-
|
3,097
|
|
1983
|
117
|
2
|
119
|
3,259
|
8
|
-
|
3,267
|
|
1984
|
110
|
4
|
114
|
3,273
|
10
|
-
|
3,283
|
|
1985
|
110
|
-
|
110
|
3,388
|
12
|
-
|
3,400
|
|
1986
|
111
|
1
|
112
|
3,194
|
13
|
-
|
3,207
|
|
1987
|
108
|
2
|
110
|
3,215
|
14
|
-
|
3,229
|
|
1988
|
106
|
4
|
110
|
3,290
|
12
|
-
|
3,302
|
|
1989
|
108
|
1
|
109
|
3,248
|
13
|
-
|
3,261
|
|
1990
|
106
|
2
|
108
|
3,273
|
14
|
-
|
3,287
|
|
1991
|
107
|
1
|
108
|
3,243
|
9
|
-
|
3,252
|
|
1992
|
104
|
2
|
106
|
3,270
|
9
|
-
|
3,279
|
|
1993
|
104
|
-
|
104
|
3,279
|
9
|
-
|
3,288
|
|
1994
|
103
|
-
|
103
|
3,275
|
11
|
-
|
3,286
|
|
1995
|
101
|
1
|
102
|
3,286
|
10
|
-
|
3,296
|
|
1996
|
100
|
1
|
101
|
3,301
|
10
|
-
|
3,311
|
|
1997
|
103
|
1
|
104
|
3,363
|
9
|
-
|
3,363
|
|
1998
|
108
|
1
|
109
|
3,463
|
6
|
-
|
3,469
|
|
1999
|
113
|
-
|
113
|
3,599
|
6
|
-
|
3,605
|
|
2000
|
117
|
1
|
118
|
3,741
|
9
|
1
|
3,751
|
|
2001
|
110
|
3
|
113
|
3,902
|
12
|
-
|
3,914
|
|
2002
|
118
|
3
|
121
|
3,927
|
9
|
-
|
3,936
|
|
2003
|
118
|
2
|
120
|
3,966
|
9
|
-
|
3,975
|
|
2004
|
123
|
1
|
124
|
4,024
|
8
|
-
|
4,032
|
|
2005
|
124
|
2
|
126
|
4,108
|
7
|
-
|
4,115
|
|
2006
|
120
|
2
|
122
|
4,197
|
4
|
-
|
4,201
|
|
2007
|
110
|
3
|
113
|
4,267
|
6
|
-
|
4,273
|
Table 01. Number of 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
|
3,633
|
33
|
266
|
3,932
|
18
|
3,950
|
|
1979
|
3,843
|
28
|
276
|
4,147
|
16
|
4,163
|
|
1980 1/
|
3,866
|
22
|
312
|
4,200
|
18
|
4,218
|
|
1981
|
3,872
|
20
|
383
|
4,275
|
24
|
4,299
|
|
1982
|
3,224
|
19
|
317
|
3,560
|
43
|
3,603
|
|
1983
|
3,386
|
17
|
252
|
3,655
|
25
|
3,680
|
|
1984
|
3,397
|
14
|
276
|
3,687
|
31
|
3,718
|
|
1985
|
3,510
|
15
|
273
|
3,798
|
44
|
3,842
|
|
1986
|
3,319
|
12
|
249
|
3,580
|
19
|
3,599
|
|
1987
|
3,339
|
13
|
241
|
3,593
|
12
|
3,605
|
|
1988
|
3,412
|
15
|
226
|
3,653
|
10
|
3,663
|
|
1989
|
3,370
|
15
|
213
|
3,598
|
16
|
3,614
|
|
1990
|
3,395
|
16
|
230
|
3,641
|
9
|
3,650
|
|
1991
|
3,360
|
15
|
235
|
3,610
|
17
|
3,627
|
|
1992
|
3,395
|
15
|
239
|
3,639
|
15
|
3,654
|
|
1993
|
3,392
|
15
|
258
|
3,665
|
16
|
3,681
|
|
1994
|
3,389
|
19
|
215
|
3,623
|
23
|
3,646
|
|
1995
|
3,398
|
20
|
212
|
3,630
|
19
|
3,649
|
|
1996
|
3,412
|
20
|
207
|
3,639
|
16
|
3,655
|
|
1997
|
3,476
|
18
|
212
|
3,706
|
6
|
3,712
|
|
1998
|
3,578
|
15
|
215
|
3,808
|
14
|
3,822
|
|
1999
|
3,718
|
13
|
218
|
3,949
|
13
|
3,962
|
|
2000
|
3,869
|
11
|
215
|
4,095
|
18
|
4,113
|
|
2001
|
4,027
|
12
|
216
|
4,255
|
27
|
4,282
|
|
2002
|
4,057
|
13
|
213
|
4,283
|
28
|
4,311
|
|
2003
|
4,095
|
14
|
211
|
4,320
|
37
|
4,357
|
|
2004
|
4,156
|
16
|
205
|
4,377
|
24
|
4,401
|
|
2005
|
4,241
|
15
|
201
|
4,457
|
33
|
4,490
|
|
2006
|
4,323
|
16
|
201
|
4,540
|
33
|
4,573
|
|
2007
|
4,386
|
17
|
210
|
4,613
|
26
|
4,797
|
|
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