# Relationship history for MSHA mine 2902237

Current hierarchy: **Richard C  Castillo → Castillo Ready Mix Inc → Castillo Pit**

- 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:** Castillo Ready Mix Inc → Castillo Pit; 2002-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Francis L  Castillo → Castillo Pit; 2002-07-22 to 2018-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Francis L  Castillo → Castillo Ready Mix Inc; 2002-07-22 to 2018-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Richard C  Castillo → Castillo Pit; 2018-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard C  Castillo → Castillo Ready Mix Inc; 2018-04-05 to current/open; source msha-controller-operator-history