# Relationship history for MSHA mine 0203018

Current hierarchy: **Carlos R Zabala → Espee Cinder Pit → Old Perrin 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Mary L  Olivier  et al → Old Perrin Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Flagstaff Cinder Sales Inc → Old Perrin Pit; 2003-06-30 to 2004-01-25; source msha-controller-operator-history
- **controller_controls_operator:** Mary L  Olivier  et al → Flagstaff Cinder Sales Inc; 2003-06-30 to 2004-01-25; source msha-controller-operator-history
- **controller_controls_operator:** Robert D  Olivier  et al → Flagstaff Cinder Sales Inc; 2003-06-30 to 2004-01-25; source msha-controller-operator-history
- **operator_operates_mine:** Espee Cinder Pit → Old Perrin Pit; 2004-01-26 to 2016-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Carlos R  Zabala  et al → Old Perrin Pit; 2004-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carlos R  Zabala  et al → Espee Cinder Pit; 2004-01-26 to 2016-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Pedro  Zabala  et al → Espee Cinder Pit; 2004-01-26 to 2016-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Espee Cinder Pit → Old Perrin Pit; 2016-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pedro  Zabala → Old Perrin Pit; 2016-03-03 to 2021-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Pedro  Zabala → Espee Cinder Pit; 2016-03-03 to 2021-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Carlos R Zabala → Old Perrin Pit; 2021-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carlos R Zabala → Espee Cinder Pit; 2021-03-01 to current/open; source msha-controller-operator-history