# Relationship history for MSHA mine 1201599

Current hierarchy: **Rooksby Robert T → Allied Minerals Inc → Warrior Plant #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** J & R Coal Company → Warrior Plant #1; 1977-09-01 to 1988-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Valero Energy Corp → Warrior Plant #1; 1977-09-01 to 1988-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Valero Energy Corp → J & R Coal Company; 1977-09-01 to 1988-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Rooksby Robert T → Warrior Plant #1; 1987-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Allied Minerals Inc → Warrior Plant #1; 1988-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rooksby Robert T → Allied Minerals Inc; 1988-06-15 to current/open; source msha-controller-operator-history