# Relationship history for MSHA mine 1502698

Current hierarchy: **James L  Griffith → D & A Coal Company Inc → No 1-C**

- 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

- **operator_operates_mine:** Rockhouse Coal Corp → No 1-C; 1950-01-01 to 1976-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Matney Otis → No 1-C; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matney Otis → Rockhouse Coal Corp; 1950-01-01 to 1976-05-09; source msha-controller-operator-history
- **controller_controls_mine:** James L  Griffith et al → No 1-C; 1970-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fields Clyde & Danny → No 1-C; 1975-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ace Coal Company → No 1-C; 1976-05-10 to 1976-11-12; source msha-controller-operator-history
- **controller_controls_operator:** Fields Clyde & Danny → Ace Coal Company; 1976-05-10 to 1976-11-12; source msha-controller-operator-history
- **operator_operates_mine:** Kimper Energy & Development Inc → No 1-C; 1976-11-13 to 1980-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Lester Danny & Harold Hunt → No 1-C; 1976-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lester Danny & Harold Hunt → Kimper Energy & Development Inc; 1976-11-13 to 1980-05-26; source msha-controller-operator-history
- **operator_operates_mine:** D & A Coal Company Inc → No 1-C; 1980-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith et al → D & A Coal Company Inc; 1980-05-27 to current/open; source msha-controller-operator-history