# Relationship history for MSHA mine 4201556

Current hierarchy: **Shumway Lyman → M E Mining Company → White Jack 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:** Mc Leroy Robert W & Darrell Bell → White Jack Mine; 1950-01-01 to 1979-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Lyman Et Al → White Jack Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bell & Mc Leroy Mining Company → White Jack Mine; 1979-01-01 to 1979-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Mc Leroy Robert W & Darrell Bell → Bell & Mc Leroy Mining Company; 1979-01-01 to 1979-11-19; source msha-controller-operator-history
- **operator_operates_mine:** M E Mining Company → White Jack Mine; 1979-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Lyman Et Al → M E Mining Company; 1979-11-20 to current/open; source msha-controller-operator-history