Table
01. Number of Nonmetallic Operations in the
by Pri
Year |
Underground Mines |
Surface Mines |
|||||
|
Underground |
Surf at UG |
Total |
Strip |
Dredge |
Other |
Total |
1978 |
119 |
7 |
126 |
1,110 |
4 |
21 |
1,135 |
1979 |
108 |
4 |
112 |
1,060 |
2 |
18 |
1,080 |
1980[1] |
125 |
42 |
167 |
1,081 |
2 |
9 |
1,092 |
1981 |
147 |
66 |
213 |
1,064 |
2 |
1 |
1,067 |
1982 |
143 |
40 |
183 |
866 |
1 |
1 |
868 |
1983 |
90 |
4 |
94 |
782 |
3 |
1 |
786 |
1984 |
88 |
2 |
90 |
774 |
4 |
1 |
779 |
1985 |
91 |
1 |
92 |
777 |
5 |
1 |
783 |
1986 |
86 |
2 |
88 |
728 |
4 |
1 |
733 |
1987 |
74 |
- |
74 |
678 |
4 |
- |
682 |
1988 |
77 |
3 |
80 |
668 |
2 |
- |
670 |
1989 |
75 |
2 |
77 |
673 |
3 |
- |
676 |
1990 |
72 |
2 |
74 |
677 |
2 |
- |
679 |
1991 |
66 |
3 |
69 |
642 |
2 |
- |
644 |
1992 |
63 |
4 |
67 |
593 |
2 |
- |
595 |
1993 |
60 |
2 |
62 |
595 |
2 |
- |
597 |
1994 |
56 |
7 |
63 |
581 |
2 |
- |
583 |
1995 |
53 |
4 |
57 |
568 |
2 |
- |
570 |
1996 |
46 |
4 |
50 |
545 |
2 |
- |
547 |
1997 |
46 |
2 |
48 |
540 |
2 |
- |
542 |
1998 |
46 |
4 |
50 |
554 |
2 |
- |
556 |
1999 |
47 |
3 |
50 |
564 |
1 |
1 |
566 |
2000 |
45 |
2 |
47 |
578 |
3 |
- |
581 |
2001 |
42 |
2 |
44 |
540 |
2 |
- |
542 |
2002 |
41 |
- |
41 |
520 |
1 |
3 |
524 |
2003 |
41 |
1 |
42 |
503 |
2 |
2 |
507 |
2004 |
45 |
- |
45 |
505 |
4 |
2 |
511 |
2005 |
44 |
1 |
45 |
503 |
5 |
2 |
510 |
2006 |
44 |
1 |
45 |
498 |
4 |
2 |
504 |
2007 |
47 |
- |
47 |
490 |
3 |
2 |
495 |
Table
01. Number of Nonmetallic Operations in the
by Pri
Year |
Total Mining |
Indp Shops/Yrds |
Mills |
Total w/o Office |
Office |
Grand Total |
1978 |
1,261 |
4 |
465 |
1,730 |
7 |
1,737 |
1979 |
1,192 |
4 |
430 |
1,626 |
10 |
1,636 |
1980 |
1,259 |
3 |
328 |
1,590 |
14 |
1,604 |
1981 |
1,280 |
2 |
405 |
1,687 |
19 |
1,706 |
1982 |
1,051 |
3 |
359 |
1,413 |
28 |
1,441 |
1983 |
880 |
2 |
278 |
1,160 |
15 |
1,175 |
1984 |
869 |
3 |
263 |
1,135 |
22 |
1,157 |
1985 |
875 |
4 |
257 |
1,136 |
20 |
1,156 |
1986 |
821 |
4 |
231 |
1,056 |
15 |
1,071 |
1987 |
756 |
2 |
231 |
989 |
11 |
1,000 |
1988 |
750 |
2 |
222 |
974 |
10 |
984 |
1989 |
753 |
1 |
207 |
961 |
9 |
970 |
1990 |
753 |
- |
212 |
965 |
18 |
983 |
1991 |
713 |
- |
194 |
907 |
12 |
919 |
1992 |
662 |
- |
178 |
840 |
15 |
855 |
1993 |
659 |
- |
184 |
843 |
9 |
852 |
1994 |
646 |
- |
178 |
824 |
11 |
835 |
1995 |
627 |
- |
176 |
803 |
6 |
809 |
1996 |
597 |
- |
177 |
774 |
7 |
781 |
1997 |
590 |
- |
184 |
774 |
12 |
786 |
1998 |
606 |
- |
183 |
789 |
12 |
801 |
1999 |
616 |
- |
179 |
795 |
13 |
808 |
2000 |
628 |
- |
178 |
806 |
15 |
821 |
2001 |
586 |
- |
179 |
765 |
20 |
785 |
2002 |
565 |
- |
177 |
742 |
21 |
763 |
2003 |
549 |
- |
169 |
718 |
16 |
734 |
2004 |
556 |
- |
167 |
723 |
18 |
741 |
2005 |
555 |
- |
171 |
726 |
13 |
739 |
2006 |
549 |
- |
171 |
720 |
21 |
741 |
2007 |
542 |
- |
163 |
705 |
20 |
725 |
[1] Beginning in 1980, independent contractors working on mine property performing mine exploration, development, production, maintenance, repair and construction work were assigned an identification number, and reported to MSHA, and are included in the count of operations. Since 1983, the contractors were separated from the mines.