# Relationship history for MSHA mine 4605938

Current hierarchy: **Cecil  Nichols → N & F Mining Company Inc → Mine No 2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Cecil  Nichols → Mine No 2; 1976-08-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** N & F Mining Company → Mine No 2; 1978-12-01 to 1980-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Hartman Charles E → Mine No 2; 1978-12-01 to 1980-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Hartman Charles E → N & F Mining Company; 1978-12-01 to 1980-08-12; source msha-controller-operator-history
- **operator_operates_mine:** C & S Coals Inc → Mine No 2; 1980-08-13 to 1981-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Crowder Garner → Mine No 2; 1980-08-13 to 1981-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Crowder Garner → C & S Coals Inc; 1980-08-13 to 1981-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Altizer Joseph W & Melvin C Nottingham → Mine No 2; 1981-05-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rich Eagle Coal Company Inc → Mine No 2; 1981-08-07 to 1985-04-16; source msha-controller-operator-history
- **controller_controls_operator:** Altizer Joseph W & Melvin C Nottingham → Rich Eagle Coal Company Inc; 1981-08-07 to 1985-04-16; source msha-controller-operator-history
- **operator_operates_mine:** N & F Mining Company Inc → Mine No 2; 1985-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cecil  Nichols → N & F Mining Company Inc; 1985-04-17 to current/open; source msha-controller-operator-history