# Relationship history for MSHA mine 4405838

Current hierarchy: **Caffrey John E → Repco Inc → No 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Richard G  Preservati II → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coy  Taylor et al → No 1; 1978-10-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Preservati Construction Company Inc → No 1; 1982-02-01 to 1984-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Preservati II → Preservati Construction Company Inc; 1982-02-01 to 1984-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Coal Corp → No 1; 1984-04-18 to 1985-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Coy  Taylor et al → Pioneer Coal Corp; 1984-04-18 to 1985-04-30; source msha-controller-operator-history
- **controller_controls_operator:** James  Taylor et al → Pioneer Coal Corp; 1984-04-18 to 1985-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Repco Inc → No 1; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Caffrey John E → No 1; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Caffrey John E → Repco Inc; 1985-05-01 to current/open; source msha-controller-operator-history