Published By Department of Labor
Issued over 9 years ago
US
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Summary
Description
This dataset contains employment and coal production reported by mine operators for each quarter in a calendar year, by subunit and mine ID beginning with 1/1/2000. The subunit code identifies the location or operation of the mine relating to the: (01) Underground; (02) Surface at underground; (03) Strip, quarry, open pit; (04) Auger; (05) Culm bank/refuse pile; (06) Dredge; (12) Other mining; (17) Independent shops or yards; (30) Mill operation/preparation plant; (99) Office workers at mine site.