# Relationship history for MSHA mine 0200622

Current hierarchy: **Clinton R  Maddux; James C  Maddux → Maddux & Sons Inc → PORTABLE SCREENING PLANT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Maddux & Sons Inc → PORTABLE SCREENING PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lenard R  Maddux → PORTABLE SCREENING PLANT; 1950-01-01 to 2015-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Lenard R  Maddux → Maddux & Sons Inc; 1950-01-01 to 2015-03-26; source msha-controller-operator-history
- **controller_controls_mine:** James C  Maddux et al → PORTABLE SCREENING PLANT; 2015-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James C  Maddux et al → Maddux & Sons Inc; 2015-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clinton R  Maddux et al → Maddux & Sons Inc; 2015-03-27 to current/open; source msha-controller-operator-history