# Relationship history for MSHA mine 1800712

Current hierarchy: **Arch Resources Inc → Patriot Mining Company Inc → Patroit Mining Co Inc**

- 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:** Patriot Mining Co Inc & Ajax Mining Co Inc → Patroit Mining Co Inc; 1979-08-01 to 1988-04-24; source msha-controller-operator-history
- **controller_controls_mine:** Anker Group Inc → Patroit Mining Co Inc; 1984-06-01 to 2005-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Patriot Mining Company Inc → Patroit Mining Co Inc; 1985-11-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Patriot Mining Company Inc; 1985-11-01 to 1986-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Patriot Coal Company → Patroit Mining Co Inc; 1987-01-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Mining Co Inc & Ajax Mining Co Inc → Patriot Coal Company; 1987-01-01 to 1987-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Patriot Mining Company Inc → Patroit Mining Co Inc; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Patriot Mining Company Inc; 1988-01-01 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Patroit Mining Co Inc; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Patriot Mining Company Inc; 2005-11-18 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Patriot Mining Company Inc; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Patroit Mining Co Inc; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Patriot Mining Company Inc; 2011-06-15 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Patriot Mining Company Inc; 2011-06-15 to current/open; source msha-controller-operator-history