# Relationship history for MSHA mine 4002370

Current hierarchy: **Fletcher Marvin H Jr → M H Coal Company Inc → No 10**

- 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:** Nunley James Earl → No 10; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** James Earl Nunley Coal Company → No 10; 1977-12-01 to 1985-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Nunley James Earl → James Earl Nunley Coal Company; 1977-12-01 to 1985-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Fletcher Marvin H Jr → No 10; 1984-06-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & B Mining Company → No 10; 1985-10-10 to 1988-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Young William E → No 10; 1985-10-10 to 1988-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Young William E → B & B Mining Company; 1985-10-10 to 1988-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Watts Mining Company Inc → No 10; 1988-03-07 to 1989-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Watts Edward → No 10; 1988-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Watts Edward → Watts Mining Company Inc; 1988-03-07 to 1989-10-31; source msha-controller-operator-history
- **operator_operates_mine:** M H Coal Company Inc → No 10; 1989-11-01 to 1992-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Fletcher Marvin H Jr → M H Coal Company Inc; 1989-11-01 to 1992-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Coal Company → No 10; 1992-03-16 to 1992-07-06; source msha-controller-operator-history
- **controller_controls_mine:** Rife Larry M → No 10; 1992-03-16 to 1992-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Rife Larry M → Eastern Coal Company; 1992-03-16 to 1992-07-06; source msha-controller-operator-history
- **operator_operates_mine:** M H Coal Company Inc → No 10; 1992-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fletcher Marvin H Jr → M H Coal Company Inc; 1992-07-07 to current/open; source msha-controller-operator-history