# Relationship history for MSHA mine 4608672

Current hierarchy: **QMAG Investors LP → Quality Magnetite LLC → Quality Magnetite LLC**

- 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:** Koch Industries Inc → Quality Magnetite LLC; 1987-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Reiss Viking Div of C Reiss Coal → Quality Magnetite LLC; 1997-01-01 to 2015-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → Reiss Viking Div of C Reiss Coal; 1997-01-01 to 2015-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Quintana Capital Group GP Ltd et al → Quality Magnetite LLC; 2008-06-19 to 2015-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Quality Magnetite LLC → Quality Magnetite LLC; 2015-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quintana Capital Group GP Ltd et al → Quality Magnetite LLC; 2015-03-16 to 2015-03-15; source msha-controller-operator-history
- **controller_controls_mine:** QMAG Investors LP → Quality Magnetite LLC; 2015-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** QMAG Investors LP → Quality Magnetite LLC; 2015-03-16 to current/open; source msha-controller-operator-history