# Relationship history for MSHA mine 1202009

Current hierarchy: **Rooksby Robert T → Fossil Fuels Resources Inc → Warrior**

- 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

- **controller_controls_mine:** Shand Alexander (Holdings) Ltd → Warrior; 1983-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & Ls Contracting Inc → Warrior; 1987-07-01 to 1988-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Shand Alexander (Holdings) Ltd → B & Ls Contracting Inc; 1987-07-01 to 1988-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Fossil Fuels Resources Inc → Warrior; 1988-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rooksby Robert T → Warrior; 1988-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rooksby Robert T → Fossil Fuels Resources Inc; 1988-06-15 to current/open; source msha-controller-operator-history