# Relationship history for MSHA mine 1201452

Current hierarchy: **Bucci Pat → Comet Coal & Clay Company Inc → Comet No 1 Mine (Strip)**

- 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:** Bucci Pat Et Al → Comet No 1 Mine (Strip); 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Comet Coal & Clay Company Inc → Comet No 1 Mine (Strip); 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bucci Pat Et Al → Comet Coal & Clay Company Inc; 1975-05-01 to current/open; source msha-controller-operator-history