# Relationship history for MSHA mine 4606106

Current hierarchy: **John  Nicolozakes → Rayle Coal Company → Brooke County 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

- **controller_controls_mine:** John  Nicolozakes et al → Brooke County Strip; 1977-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rayle Coal Company → Brooke County Strip; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Nicolozakes et al → Rayle Coal Company; 1980-01-01 to current/open; source msha-controller-operator-history