# Relationship history for MSHA mine 2401588

Current hierarchy: **Van Zyl Bernard → Resources America Inc → Grubstake Or Grubstake Mine & Mill**

- 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:** Van Zyl Bernard → Grubstake Or Grubstake Mine & Mill; 1980-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L R Mc Combs General Contractor → Grubstake Or Grubstake Mine & Mill; 1980-09-01 to 1981-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Mc Combs Lee Roy Et Al → Grubstake Or Grubstake Mine & Mill; 1980-09-01 to 1981-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Mc Combs Lee Roy Et Al → L R Mc Combs General Contractor; 1980-09-01 to 1981-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Resources America Inc → Grubstake Or Grubstake Mine & Mill; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Van Zyl Bernard → Resources America Inc; 1981-07-01 to current/open; source msha-controller-operator-history