# Relationship history for MSHA mine 3300746

Current hierarchy: **Stephen  Varkony; William M  Varkony → Varkony Mining Company → Myers (Strip)**

- 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:** Blue Ridge Coal Company → Myers (Strip); 1950-01-01 to 1976-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Reynard Paul S → Myers (Strip); 1950-01-01 to 1976-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Reynard Paul S → Blue Ridge Coal Company; 1950-01-01 to 1976-06-30; source msha-controller-operator-history
- **controller_controls_mine:** William M  Varkony et al → Myers (Strip); 1974-08-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Varkony Mining Company → Myers (Strip); 1976-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William M  Varkony et al → Varkony Mining Company; 1976-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Varkony et al → Varkony Mining Company; 1976-07-01 to current/open; source msha-controller-operator-history