# Relationship history for MSHA mine 0400187

Current hierarchy: **Johnson Charles Wayne → Astro Minerals Inc → Marter-White 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

- **operator_operates_mine:** La Habra Products Inc → Marter-White Mine; 1950-01-01 to 1980-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Kingsland Tod → Marter-White Mine; 1950-01-01 to 1980-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Kingsland Tod → La Habra Products Inc; 1950-01-01 to 1980-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Marter White Inc → Marter-White Mine; 1980-10-14 to 1984-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Industrial Mineral Products Inc → Marter-White Mine; 1980-10-14 to 1984-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Industrial Mineral Products Inc → Marter White Inc; 1980-10-14 to 1984-05-23; source msha-controller-operator-history
- **operator_operates_mine:** Green Thumb Milling Company → Marter-White Mine; 1984-05-24 to 1985-01-24; source msha-controller-operator-history
- **controller_controls_mine:** Cox William A → Marter-White Mine; 1984-05-24 to 1985-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Cox William A → Green Thumb Milling Company; 1984-05-24 to 1985-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Astro Minerals Inc → Marter-White Mine; 1985-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Charles Wayne → Marter-White Mine; 1985-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Charles Wayne → Astro Minerals Inc; 1985-01-25 to current/open; source msha-controller-operator-history