# Relationship history for MSHA mine 1513396

Current hierarchy: **Mc Ghee Jack → Quick Silver Mining Inc → Mine #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Quick Silver Mining Inc → Mine #1; 1982-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Ghee Jack Et Al → Mine #1; 1982-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Ghee Jack Et Al → Quick Silver Mining Inc; 1982-03-01 to current/open; source msha-controller-operator-history