# Relationship history for MSHA mine 0404783

Current hierarchy: **Garrett  Petelski; Thomas  Hrubik → GLOBAL PUMICE, LLC → Global Pumice Mine - Olancha**

- 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

- **operator_operates_mine:** Natural Aggregate Company → Global Pumice Mine - Olancha; 1985-12-01 to 1988-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Baird → Global Pumice Mine - Olancha; 1985-12-01 to 1988-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Baird → Natural Aggregate Company; 1985-12-01 to 1988-12-08; source msha-controller-operator-history
- **operator_operates_mine:** Pacific Natural Aggregate Company → Global Pumice Mine - Olancha; 1988-12-09 to 1996-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Global Pumice Mine - Olancha; 1988-12-09 to 1996-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Pacific Natural Aggregate Company; 1988-12-09 to 1996-01-22; source msha-controller-operator-history
- **operator_operates_mine:** California Natural Aggregates, Inc. → Global Pumice Mine - Olancha; 1996-01-23 to 2014-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Texas Industries Inc → Global Pumice Mine - Olancha; 1996-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Texas Industries Inc → California Natural Aggregates, Inc.; 1996-01-23 to 2014-02-02; source msha-controller-operator-history
- **operator_operates_mine:** GLOBAL PUMICE, LLC → Global Pumice Mine - Olancha; 2014-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Hrubik et al → Global Pumice Mine - Olancha; 2014-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Hrubik et al → GLOBAL PUMICE, LLC; 2014-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garrett  Petelski et al → GLOBAL PUMICE, LLC; 2014-02-03 to current/open; source msha-controller-operator-history