# Relationship history for MSHA mine 4003594

Current hierarchy: **Rodolfo Villarreal  Alvarez → Alvarez Stone → Alvarez Stone #2**

- 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:** Rodolfo Villarreal  Alvarez → Alvarez Stone #2; 2021-12-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alvarez Stone → Alvarez Stone #2; 2023-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodolfo Villarreal  Alvarez → Alvarez Stone; 2023-05-11 to current/open; source msha-controller-operator-history