# Relationship history for MSHA mine 0301918

Current hierarchy: **Gary D  Green; Leo  Green → Quartz City → Jack Pot**

- 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:** Quartz City → Jack Pot; 2005-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leo  Green et al → Jack Pot; 2005-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leo  Green et al → Quartz City; 2005-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary D  Green et al → Quartz City; 2005-07-11 to current/open; source msha-controller-operator-history