# Relationship history for MSHA mine 4400009

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Belmont 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 → Belmont Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Belmont Traprock Company Inc → Belmont Quarry; 1950-01-01 to 1980-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Conrad T  Lawrence → Belmont Quarry; 1950-01-01 to 1980-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Conrad T  Lawrence → Belmont Traprock Company Inc; 1950-01-01 to 1980-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Belmont Traprock Company Inc → Belmont Quarry; 1980-01-15 to 1988-06-01; source msha-controller-operator-history
- **controller_controls_mine:** George P  Martin → Belmont Quarry; 1980-01-15 to 1988-06-01; source msha-controller-operator-history
- **controller_controls_operator:** George P  Martin → Belmont Traprock Company Inc; 1980-01-15 to 1988-06-01; source msha-controller-operator-history
- **operator_operates_mine:** Appomattox Lime Company → Belmont Quarry; 1988-06-02 to 2002-11-30; source msha-controller-operator-history
- **controller_controls_mine:** David D  Willis → Belmont Quarry; 1988-06-02 to 2016-05-17; source msha-controller-operator-history
- **controller_controls_operator:** David D  Willis → Appomattox Lime Company; 1988-06-02 to 2002-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Appomattox Lime Company → Belmont Quarry; 2002-12-01 to 2026-08-11; source msha-controller-operator-history
- **controller_controls_operator:** David D  Willis → Appomattox Lime Company; 2002-12-01 to 2016-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Willis Trust et al → Belmont 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 2002-11-30; 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 → Belmont 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 2002-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Rockydale Quarries Corporation → Appomattox Lime Company; 2017-08-09 to 2026-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Belmont Quarry; 2026-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2026-08-12 to current/open; source msha-controller-operator-history