# Relationship history for MSHA mine 4606700

Current hierarchy: **Anderson Arthur L → Triple A Coals Inc → Deep Mine No 2**

- 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:** Anderson Arthur L → Deep Mine No 2; 1976-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cecil  Nichols → Deep Mine No 2; 1976-08-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** N & F Mining Company Inc → Deep Mine No 2; 1983-09-01 to 1987-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Cecil  Nichols → N & F Mining Company Inc; 1983-09-01 to 1987-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Jessie D → Deep Mine No 2; 1987-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple A Coals Inc → Deep Mine No 2; 1987-08-03 to 1988-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Anderson Arthur L → Triple A Coals Inc; 1987-08-03 to 1988-12-06; source msha-controller-operator-history
- **operator_operates_mine:** P B T Coal Company Inc → Deep Mine No 2; 1988-12-07 to 1989-11-26; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Jessie D → P B T Coal Company Inc; 1988-12-07 to 1989-11-26; source msha-controller-operator-history
- **operator_operates_mine:** Bona Fide Mining Inc → Deep Mine No 2; 1989-11-27 to 1990-08-30; source msha-controller-operator-history
- **controller_controls_mine:** Sigler Walter W Et Al → Deep Mine No 2; 1989-11-27 to 1990-08-30; source msha-controller-operator-history
- **controller_controls_operator:** Sigler Walter W Et Al → Bona Fide Mining Inc; 1989-11-27 to 1990-08-30; source msha-controller-operator-history
- **operator_operates_mine:** Triple A Coals Inc → Deep Mine No 2; 1990-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anderson Arthur L → Triple A Coals Inc; 1990-08-31 to current/open; source msha-controller-operator-history