# Relationship history for MSHA mine 4602894

Current hierarchy: **Hickman George E → Thomas Mountain Coal Company Inc → Sink No 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:** Double Jacks Coal Company → Sink No 1; 1950-01-01 to 1972-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Double Jacks Coal Company → Sink No 1; 1950-01-01 to 1972-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Double Jacks Coal Company → Double Jacks Coal Company; 1950-01-01 to 1972-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Francis David L → Sink No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Interstate Development Company → Sink No 1; 1972-06-21 to 1975-12-05; source msha-controller-operator-history
- **controller_controls_operator:** Francis David L → Interstate Development Company; 1972-06-21 to 1975-12-05; source msha-controller-operator-history
- **operator_operates_mine:** Sink Coal Company → Sink No 1; 1975-12-06 to 1980-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Sinks Charles → Sink No 1; 1975-12-06 to 1980-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Sinks Charles → Sink Coal Company; 1975-12-06 to 1980-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Cindy Lynn Resources Inc → Sink No 1; 1980-09-02 to 1987-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Yarber Don → Sink No 1; 1980-09-02 to 1987-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Yarber Don → Cindy Lynn Resources Inc; 1980-09-02 to 1987-05-13; source msha-controller-operator-history
- **operator_operates_mine:** Fire Creek Coals → Sink No 1; 1987-05-14 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Deel Donald K & Kimberly D → Sink No 1; 1987-05-14 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Deel Donald K & Kimberly D → Fire Creek Coals; 1987-05-14 to 1988-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Thomas Mountain Coal Company Inc → Sink No 1; 1988-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hickman George E → Sink No 1; 1988-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hickman George E → Thomas Mountain Coal Company Inc; 1988-05-19 to current/open; source msha-controller-operator-history