# Relationship history for MSHA mine 4405247

Current hierarchy: **Potter Billy D & Jimmy R Dotson → Potter & Dotson 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:** Justus Timothy Et Al → No 7; 1975-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potter Billy D & Jimmy R Dotson → No 7; 1976-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stiltner Kermit Et Al → No 7; 1977-03-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rockdale Mining Company Inc → No 7; 1979-06-01 to 1980-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Stiltner Kermit Et Al → Rockdale Mining Company Inc; 1979-06-01 to 1980-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Dyna Carb Coal Company Inc → No 7; 1980-07-23 to 1982-04-16; source msha-controller-operator-history
- **controller_controls_operator:** Justus Timothy Et Al → Dyna Carb Coal Company Inc; 1980-07-23 to 1982-04-16; source msha-controller-operator-history
- **operator_operates_mine:** Double E Coal Company Inc → No 7; 1982-04-17 to 1982-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Bob R & Edgar Et Al → No 7; 1982-04-17 to 1982-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Bob R & Edgar Et Al → Double E Coal Company Inc; 1982-04-17 to 1982-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Keen Boyd → No 7; 1982-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Coal Company Inc → No 7; 1982-08-23 to 1984-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Keen Boyd → Cedar Coal Company Inc; 1982-08-23 to 1984-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Bless Coal Company Inc → No 7; 1984-10-01 to 1986-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Bobby Gene  Yates → No 7; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby Gene  Yates → Bless Coal Company Inc; 1984-10-01 to 1986-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Bless Coal Corp → No 7; 1986-08-26 to 1987-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Daniels Roger E → No 7; 1986-08-26 to 1987-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Daniels Roger E → Bless Coal Corp; 1986-08-26 to 1987-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Potter & Dotson Coal Company Inc → No 7; 1987-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Potter Billy D & Jimmy R Dotson → Potter & Dotson Coal Company Inc; 1987-07-16 to current/open; source msha-controller-operator-history