# Relationship history for MSHA mine 1201950

Current hierarchy: **Bucci Pat → Comet Coal Sales Inc → Comet Coal Sales**

- 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:** Comet Coal Sales Inc → Comet Coal Sales; 1984-08-01 to 1986-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Bucci Pat Et Al → Comet Coal Sales; 1984-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bucci Pat Et Al → Comet Coal Sales Inc; 1984-08-01 to 1986-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Cbs Coal Sales Inc → Comet Coal Sales; 1986-09-26 to 1988-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Carr John D → Comet Coal Sales; 1986-09-26 to 1988-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Carr John D → Cbs Coal Sales Inc; 1986-09-26 to 1988-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Comet Coal Sales Inc → Comet Coal Sales; 1988-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bucci Pat Et Al → Comet Coal Sales Inc; 1988-10-31 to current/open; source msha-controller-operator-history