# Relationship history for MSHA mine 4607048

Current hierarchy: **Paul R  Phillips; Malcolm  Phillips → Har-Mat Coal Company Inc → #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

- **operator_operates_mine:** Har-Mat Coal Company Inc → #1; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Malcolm  Phillips et al → #1; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Malcolm  Phillips et al → Har-Mat Coal Company Inc; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul R  Phillips et al → Har-Mat Coal Company Inc; 1986-01-01 to current/open; source msha-controller-operator-history