# Relationship history for MSHA mine 4403441

Current hierarchy: **Ashby James M → Ramar Coal Company Inc → Ramar Tipple #1**

- 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

- **operator_operates_mine:** Jewell Ridge Mining Corp → Ramar Tipple #1; 1950-01-01 to 1987-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → Ramar Tipple #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Jewell Ridge Mining Corp; 1950-01-01 to 1987-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Raymond → Ramar Tipple #1; 1981-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R B J Coal Company Inc → Ramar Tipple #1; 1987-06-24 to 1988-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Raymond → R B J Coal Company Inc; 1987-06-24 to 1988-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Ramar Coal Company Inc → Ramar Tipple #1; 1988-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ashby James M Et Al → Ramar Tipple #1; 1988-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashby James M Et Al → Ramar Coal Company Inc; 1988-05-05 to current/open; source msha-controller-operator-history