# Relationship history for MSHA mine 4402973

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Appomattox Quarry**

- 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

- **controller_controls_mine:** Rogers Group Inc → Appomattox Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appomattox Lime Company → Appomattox Quarry; 1950-01-01 to 1989-03-09; source msha-controller-operator-history
- **controller_controls_mine:** James W  Mc Donald  et al → Appomattox Quarry; 1950-01-01 to 1989-03-09; source msha-controller-operator-history
- **controller_controls_operator:** James W  Mc Donald  et al → Appomattox Lime Company; 1950-01-01 to 1989-03-09; source msha-controller-operator-history
- **controller_controls_mine:** David D  Willis → Appomattox Quarry; 1988-06-02 to 2016-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Appomattox Lime Company → Appomattox Quarry; 1989-03-10 to 2026-05-14; source msha-controller-operator-history
- **controller_controls_operator:** David D  Willis → Appomattox Lime Company; 1989-03-10 to 2016-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Willis Trust et al → Appomattox Quarry; 2016-05-18 to 2017-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Willis Trust et al → Appomattox Lime Company; 2016-05-18 to 2017-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Rockydale Quarries Corporation → Appomattox Quarry; 2017-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rockydale Quarries Corporation → Appomattox Lime Company; 2017-08-09 to 2026-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Appomattox Quarry; 2026-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2026-05-15 to current/open; source msha-controller-operator-history