# Relationship history for MSHA mine 1518809

Current hierarchy: **Debra R  Mugumya → Black Fire Energy 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

- **controller_controls_mine:** Larry  Thornsberry et al → No. 1; 1982-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Skeans → No. 1; 2004-01-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Skyline Excavation Inc. → No. 1; 2004-10-13 to 2009-03-01; source msha-controller-operator-history
- **controller_controls_mine:** James M  Allen → No. 1; 2004-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James M  Allen → Skyline Excavation Inc.; 2004-10-13 to 2009-03-01; source msha-controller-operator-history
- **operator_operates_mine:** East Kentucky Excavating Inc → No. 1; 2009-03-02 to 2010-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Skeans → East Kentucky Excavating Inc; 2009-03-02 to 2010-04-08; source msha-controller-operator-history
- **operator_operates_mine:** PIA Company Inc → No. 1; 2010-04-09 to 2012-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Thornsberry et al → PIA Company Inc; 2010-04-09 to 2012-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Black Fire Energy Inc → No. 1; 2012-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eddie  Lawson → No. 1; 2012-01-05 to 2012-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Lawson → Black Fire Energy Inc; 2012-01-05 to 2012-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Debra R  Mugumya → No. 1; 2012-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Debra R  Mugumya → Black Fire Energy Inc; 2012-05-14 to current/open; source msha-controller-operator-history