# Relationship history for MSHA mine 4604606

Current hierarchy: **James D  Duba → Ramdu Inc → No 6**

- 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 6; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chafin Coal Company Inc → No 6; 1975-05-03 to 1979-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Chafin John C Sr → Chafin Coal Company Inc; 1975-05-03 to 1979-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Laramie Mining Company Inc → No 6; 1979-10-30 to 1982-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Harry G  Cooke et al → No 6; 1979-10-30 to 1982-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Harry G  Cooke et al → Laramie Mining Company Inc; 1979-10-30 to 1982-12-08; source msha-controller-operator-history
- **operator_operates_mine:** Chafin Coal Company Inc → No 6; 1982-12-09 to 1983-09-07; source msha-controller-operator-history
- **controller_controls_operator:** Chafin John C Sr → Chafin Coal Company Inc; 1982-12-09 to 1983-09-07; source msha-controller-operator-history
- **operator_operates_mine:** Jart Minerals Ltd → No 6; 1983-09-08 to 1986-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Chafin John C Jr & Arthur B Chafin → No 6; 1983-09-08 to 1986-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Chafin John C Jr & Arthur B Chafin → Jart Minerals Ltd; 1983-09-08 to 1986-02-23; source msha-controller-operator-history
- **operator_operates_mine:** Delta Mining Corp → No 6; 1986-02-24 to 1986-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Gary K → No 6; 1986-02-24 to 1987-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Gary K → Delta Mining Corp; 1986-02-24 to 1986-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Caryco Mining Ltd → No 6; 1986-08-28 to 1987-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Chafin Arthur → No 6; 1986-08-28 to 1987-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Chafin Arthur → Caryco Mining Ltd; 1986-08-28 to 1987-09-09; source msha-controller-operator-history
- **operator_operates_mine:** A & M Mining Inc → No 6; 1987-09-10 to 1990-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Baisden Joe → No 6; 1987-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baisden Joe → A & M Mining Inc; 1987-09-10 to 1990-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Clean Eagle Coal Inc → No 6; 1990-01-17 to 1992-10-20; source msha-controller-operator-history
- **controller_controls_mine:** Brown Gary M Jr → No 6; 1990-01-17 to 1992-10-20; source msha-controller-operator-history
- **controller_controls_operator:** Brown Gary M Jr → Clean Eagle Coal Inc; 1990-01-17 to 1992-10-20; source msha-controller-operator-history
- **operator_operates_mine:** Ramdu Inc → No 6; 1992-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James D  Duba → No 6; 1992-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James D  Duba → Ramdu Inc; 1992-10-21 to current/open; source msha-controller-operator-history