Mine operator and controller activity histories
Data Stockroom, a product of LaunchNav LLC — 100-row sample

Registration-active MSHA mines with separate operator/controller history, addresses of record and reported subunit employment and coal production from 2020 onward.

Processed on: 2026-10-04
Period: ASOF2026-10-03 (as of 2026-10-03)
Primary source snapshot: 2026-10-03

CONTENTS
sample.csv: 100 real rows, all 22 columns from mines.csv.
Repeatable selection; not a statistically representative sample. The legend describes the full product; companion data tables are only in the full download.

FEATURES AND PREPARATION
- Complete captured MSHA Active mine population; published mine identifiers remain text.
- Separate mine, operator and controller identifiers and dated relationships.
- Reported quarterly subunit activity from 2020 onward; coal production is not noncoal output.

SOURCES AND ATTRIBUTION
U.S. Department of Labor — MSHA open government data — MSHA captured inventory and 2020 onward reported activity
https://arlweb.msha.gov/OpenGovernmentData/OGIMSHA.asp
Mine inventory, reported activity and operator/controller relationships Attribution: U.S. Department of Labor, Mine Safety and Health Administration; no endorsement implied.

USING THE FILES
legend.csv defines the columns, units, formats and blank-value meanings.
CSV is UTF-8 with headers. Import identifiers, ZIP codes and phones as text. Blank differs from zero or false.
LICENSES.txt contains source attribution and applicable notices.

LIMITATIONS
- Active is the source registration status; it does not prove current production.
- Employment is reported per mine or subunit, not current company headcount.
- Legacy source text uses byte-preserving ISO-8859-1 decoding and may contain source encoding artifacts.
- Addresses of record can be operator offices. PERSON controller names are withheld; business names can contain proprietor names.
- Subunits, reporting quarters and current ownership describe different grains; do not sum overlapping counts.

DATA STOCKROOM TERMS
- This is a dated data snapshot. It does not include an ongoing update service.
- The files are supplied as-is. Accuracy, completeness, contact reachability and suitability for a particular use are not guaranteed. Independently verify information needed for your use.
- Underlying source data remains subject to the included upstream licenses and notices. Those terms govern that material; these terms do not restrict upstream permissions or rights in public-domain information.
- Data Stockroom does not claim agency endorsement or exclusive ownership of underlying public facts. A published contact does not establish consent to marketing.

Support: hello@datastockroom.com
