# Relationship history for MSHA mine 4003201

Current hierarchy: **Alberto  Arreola → Arreola Stone → Arreola Stone**

- 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:** Willis Stone → Arreola Stone; 2003-04-07 to 2005-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Gene  Willis → Arreola Stone; 2003-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gene  Willis → Willis Stone; 2003-04-07 to 2005-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Arreola Stone → Arreola Stone; 2005-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alberto  Arreola → Arreola Stone; 2005-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alberto  Arreola → Arreola Stone; 2005-02-03 to current/open; source msha-controller-operator-history