# Relationship history for MSHA mine 1002289

Current hierarchy: **Ron  Van Beek → Thermocal Minerals of Idaho LLC → Gypsum mine**

- 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:** Harold J  Wilson et al → Gypsum mine; 1950-01-01 to 2015-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Ron  Van Beek et al → Gypsum mine; 2015-04-22 to 2021-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Thermocal Minerals of Idaho LLC → Gypsum mine; 2019-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Van Beek et al → Thermocal Minerals of Idaho LLC; 2019-04-12 to 2021-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Van Beek et al → Thermocal Minerals of Idaho LLC; 2019-04-12 to 2021-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Harold J  Wilson et al → Thermocal Minerals of Idaho LLC; 2019-04-12 to 2015-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Ron  Van Beek → Gypsum mine; 2021-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Van Beek → Thermocal Minerals of Idaho LLC; 2021-02-16 to current/open; source msha-controller-operator-history