# Relationship history for MSHA mine 4606995

Current hierarchy: **Swartz James C Jr → D & A Resources Inc → Mine No 3**

- 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:** Arm-Power Coal Company → Mine No 3; 1985-09-01 to 1987-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Kessler Johnie & Garland Bryant → Mine No 3; 1985-09-01 to 1987-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Kessler Johnie & Garland Bryant → Arm-Power Coal Company; 1985-09-01 to 1987-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Grace Coal Company Inc → Mine No 3; 1987-06-03 to 1988-09-25; source msha-controller-operator-history
- **controller_controls_mine:** O'Neal Winston R → Mine No 3; 1987-06-03 to 1988-09-25; source msha-controller-operator-history
- **controller_controls_operator:** O'Neal Winston R → Grace Coal Company Inc; 1987-06-03 to 1988-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Swartz James C Jr → Mine No 3; 1987-10-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D & A Resources Inc → Mine No 3; 1988-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Swartz James C Jr → D & A Resources Inc; 1988-09-26 to current/open; source msha-controller-operator-history