# Relationship history for MSHA mine 0203229

Current hierarchy: **Craig  Hills → Phoenix San-Man Inc → Buckeye Plant #24**

- 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

- **controller_controls_mine:** Craig  Hills et al → Buckeye Plant #24; 1999-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix San-Man Inc → Buckeye Plant #24; 2008-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Hills et al → Phoenix San-Man Inc; 2008-10-07 to current/open; source msha-controller-operator-history