# Relationship history for MSHA mine 4604641

Current hierarchy: **Everett E  Ballard Jr → Ballard Brothers Coal Inc → Grey Fox Mine**

- 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:** Impco-International Mining & Petroleum Co → Grey Fox Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Cline → Grey Fox Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Belva Coal Company Inc → Grey Fox Mine; 1975-05-23 to 1976-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Impco-International Mining & Petroleum Co → Belva Coal Company Inc; 1975-05-23 to 1976-02-29; source msha-controller-operator-history
- **operator_operates_mine:** R J F Coal Company Inc → Grey Fox Mine; 1976-03-01 to 1977-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Cline → R J F Coal Company Inc; 1976-03-01 to 1977-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Reading & Bates Corp → Grey Fox Mine; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Belva Coal Company Inc → Grey Fox Mine; 1977-09-06 to 1981-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Reading & Bates Corp → Belva Coal Company Inc; 1977-09-06 to 1981-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Rhyan-Beth Coal Company → Grey Fox Mine; 1981-08-17 to 1985-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Ralph  Meade → Grey Fox Mine; 1981-08-17 to 1985-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Meade → Rhyan-Beth Coal Company; 1981-08-17 to 1985-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Belva Coal Company Inc → Grey Fox Mine; 1985-02-20 to 1990-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Reading & Bates Corp → Belva Coal Company Inc; 1985-02-20 to 1990-01-28; source msha-controller-operator-history
- **controller_controls_mine:** Shirkey John P → Grey Fox Mine; 1990-01-11 to 1990-06-03; source msha-controller-operator-history
- **operator_operates_mine:** S & B Mining Inc → Grey Fox Mine; 1990-01-29 to 1990-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Shirkey John P → S & B Mining Inc; 1990-01-29 to 1990-06-03; source msha-controller-operator-history
- **operator_operates_mine:** S & B Mining Inc → Grey Fox Mine; 1990-06-04 to 1990-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Plymale Mark → Grey Fox Mine; 1990-06-04 to 1991-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Plymale Mark → S & B Mining Inc; 1990-06-04 to 1990-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Bi-Mor Coal Inc → Grey Fox Mine; 1990-11-09 to 1992-06-07; source msha-controller-operator-history
- **controller_controls_mine:** Trent Ottaway & Homer Hopkins → Grey Fox Mine; 1990-11-09 to 1992-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Trent Ottaway & Homer Hopkins → Bi-Mor Coal Inc; 1990-11-09 to 1992-06-07; source msha-controller-operator-history
- **controller_controls_mine:** Everett E  Ballard Jr → Grey Fox Mine; 1991-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bi-Mor Coal Inc → Grey Fox Mine; 1992-06-08 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Bowling Donald → Grey Fox Mine; 1992-06-08 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Bowling Donald → Bi-Mor Coal Inc; 1992-06-08 to 1992-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Ballard Brothers Coal Inc → Grey Fox Mine; 1992-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Everett E  Ballard Jr → Ballard Brothers Coal Inc; 1992-10-01 to current/open; source msha-controller-operator-history