# Relationship history for MSHA mine 4104871

Current hierarchy: **Estella  Cervantes → Cervantes Stone → Cervantes Stone (Dolby Ranch)**

- 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:** Cervantes Stone → Cervantes Stone (Dolby Ranch); 2011-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Estella  Cervantes → Cervantes Stone (Dolby Ranch); 2011-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Estella  Cervantes → Cervantes Stone; 2011-04-26 to current/open; source msha-controller-operator-history