|
NIOSH Mining Safety and Health Research |
Summary of Mine-Level Characteristics for Mine
Operators,
2007 |
|
Characteristic |
Coal |
Metal |
Nonmetal |
Stone |
Sand & Gravel |
All Mines |
|
Number of mines |
2,030 |
278 |
725 |
4,639 |
7,199 |
14,871 |
|
Number of employees |
84,071 |
36,000 |
22,864 |
82,718 |
45,761 |
271,414 |
|
Average employment size |
41.4 |
129.5 |
31.5 |
17.8 |
6.4 |
18.3 |
|
Median employment size |
16.0 |
15.0 |
8.0 |
9.0 |
4.0 |
6.0 |
|
Number of FTEs1 |
93,265 |
37,746 |
23,265 |
83,254 |
38,340 |
275,871 |
|
Average FTE employment size |
45.9 |
135.8 |
32.1 |
17.9 |
5.3 |
18.6 |
|
Median FTE employment size |
14.3 |
12.5 |
7.2 |
7.8 |
2.4 |
4.3 |
| 1Full-time equivalent employees based on reported number of
employee hours (2,000 hours = 1 FTE). |
| Data Source: MSHA |
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