# Relationship history for MSHA mine 0301779

Current hierarchy: **Brent  Gill → Arkansas Quality Stone Company → Arkansas Quality Stone Company**

- 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:** Arkansas Quality Stone Company → Arkansas Quality Stone Company; 1996-10-01 to 2000-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Rick L  Parrott → Arkansas Quality Stone Company; 1996-10-01 to 2000-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Rick L  Parrott → Arkansas Quality Stone Company; 1996-10-01 to 2000-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Arkansas Quality Stone Company → Arkansas Quality Stone Company; 2000-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doug  Gill → Arkansas Quality Stone Company; 2000-01-03 to 2020-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Gill → Arkansas Quality Stone Company; 2000-01-03 to 2020-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Brent  Gill → Arkansas Quality Stone Company; 2020-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Gill → Arkansas Quality Stone Company; 2020-01-03 to current/open; source msha-controller-operator-history