# Relationship history for MSHA mine 1519379

Current hierarchy: **Keith E  Thacker → TORCHLIGHT ADVANCED FUELS INC. → No. 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Torchlight Energy Inc → No. 1; 2009-01-22 to 2012-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Keith E  Thacker → No. 1; 2009-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith E  Thacker → Torchlight Energy Inc; 2009-01-22 to 2012-05-15; source msha-controller-operator-history
- **operator_operates_mine:** 4 Dudes LLC → No. 1; 2012-05-16 to 2018-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Richard J  Kushner et al → No. 1; 2012-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard J  Kushner et al → 4 Dudes LLC; 2012-05-16 to 2018-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Robert S  Berezansky et al → 4 Dudes LLC; 2012-05-16 to 2018-12-03; source msha-controller-operator-history
- **operator_operates_mine:** TORCHLIGHT ADVANCED FUELS INC. → No. 1; 2018-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keith E  Thacker → No. 1; 2018-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith E  Thacker → TORCHLIGHT ADVANCED FUELS INC.; 2018-12-04 to current/open; source msha-controller-operator-history