# Relationship history for MSHA mine 4104964

Current hierarchy: **Vistra Energy → Luminant Mining Company LLC → Liberty**

- 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:** TXU → Liberty; 2007-08-31 to 2007-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Energy Future Holdings Corporation → Liberty; 2007-10-01 to 2016-10-03; source msha-controller-operator-history
- **operator_operates_mine:** Luminant Mining Company LLC → Liberty; 2012-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Energy Future Holdings Corporation → Luminant Mining Company LLC; 2012-10-24 to 2016-10-03; source msha-controller-operator-history
- **controller_controls_operator:** TXU → Luminant Mining Company LLC; 2012-10-24 to 2007-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Vistra Energy → Liberty; 2016-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vistra Energy → Luminant Mining Company LLC; 2016-10-04 to current/open; source msha-controller-operator-history