|
NIOSH Mining Safety and Health Research |
Summary of Mine-Level Characteristics by Commodity,
2006 |
|
Characteristic |
Coal |
Metal |
Nonmetal |
Stone |
Sand & Gravel |
Total |
|
Number of mines |
2,113 |
280 |
741 |
4,573 |
7,178 |
14,885 |
|
Number of employees |
85,693 |
32,874 |
23,051 |
82,583 |
46,069 |
270,270 |
|
Average employment size |
40.6 |
117.4 |
31.1 |
18.1 |
6.4 |
18.2 |
|
Median employment size |
16.0 |
13.0 |
8.0 |
9.0 |
4.0 |
6.0 |
|
Number of FTEs1 |
94,495 |
33,972 |
23,221 |
85,402 |
39,796 |
276,886 |
|
Average FTE employment size |
44.7 |
121.3 |
31.3 |
18.7 |
5.5 |
18.6 |
|
Median FTE employment size |
13.7 |
10.6 |
6.9 |
8.2 |
2.5 |
4.5 |
| 1Full-time equivalent employees based on reported number of
employee hours (2,000 hours = 1 FTE). |
| Data Source: MSHA |
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