# Relationship history for MSHA mine 4605139

Current hierarchy: **Chafin John C Sr → Chafin Coal Company Inc → No 7**

- 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:** Chafin John C Sr → No 7; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chafin Coal Company Inc → No 7; 1975-09-08 to 1981-01-25; source msha-controller-operator-history
- **controller_controls_operator:** Chafin John C Sr → Chafin Coal Company Inc; 1975-09-08 to 1981-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Larry David  Cochran et al → No 7; 1980-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Deerfield Mining Company Inc → No 7; 1981-01-26 to 1982-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Larry David  Cochran et al → Deerfield Mining Company Inc; 1981-01-26 to 1982-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Harry G  Cooke et al → Deerfield Mining Company Inc; 1981-01-26 to 1982-12-08; source msha-controller-operator-history
- **operator_operates_mine:** Chafin Coal Company Inc → No 7; 1982-12-09 to 1986-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Chafin John C Sr → Chafin Coal Company Inc; 1982-12-09 to 1986-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Greenlick Coal Inc → No 7; 1986-05-30 to 1986-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Blankenship Lillian-Sue Brown Et Al → No 7; 1986-05-30 to 1986-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Lillian-Sue Brown Et Al → Greenlick Coal Inc; 1986-05-30 to 1986-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Greenlick Coal Inc → No 7; 1986-12-15 to 1987-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Workman William F → No 7; 1986-12-15 to 1987-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Workman William F → Greenlick Coal Inc; 1986-12-15 to 1987-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Chafin Coal Company Inc → No 7; 1987-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chafin John C Sr → Chafin Coal Company Inc; 1987-07-23 to current/open; source msha-controller-operator-history