# Relationship history for MSHA mine 1518275

Current hierarchy: **John H  Parton → Parton Brothers Contracting Inc → Glendon #2**

- 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:** Charles  Collins → Glendon #2; 1992-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John H  Parton → Glendon #2; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Calvary Coal Company Inc → Glendon #2; 2000-08-01 to 2001-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Collins → Calvary Coal Company Inc; 2000-08-01 to 2001-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Free Dome Coal Inc → Glendon #2; 2001-01-16 to 2001-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Jimmy  Root  et al → Glendon #2; 2001-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy  Root  et al → Free Dome Coal Inc; 2001-01-16 to 2001-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Donnie  Wagers  et al → Free Dome Coal Inc; 2001-01-16 to 2001-02-11; source msha-controller-operator-history
- **operator_operates_mine:** Parton Brothers Contracting Inc → Glendon #2; 2001-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John H  Parton → Parton Brothers Contracting Inc; 2001-02-12 to current/open; source msha-controller-operator-history