# Relationship history for MSHA mine 3800589

Current hierarchy: **Antonio C  Ramos → Georgia Stone Industries Inc → South Carolina-Kershaw 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Antonio C  Ramos → South Carolina-Kershaw Quarry; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Granite Company Inc → South Carolina-Kershaw Quarry; 1984-03-12 to 1988-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Tony J  Morris → South Carolina-Kershaw Quarry; 1984-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony J  Morris → Georgia Granite Company Inc; 1984-03-12 to 1988-11-02; source msha-controller-operator-history
- **operator_operates_mine:** New England Stone Industries Inc → South Carolina-Kershaw Quarry; 1988-11-03 to 1996-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → New England Stone Industries Inc; 1988-11-03 to 1996-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Kenny L  Gibson → South Carolina-Kershaw Quarry; 1995-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Continental Mining Company Inc → South Carolina-Kershaw Quarry; 1996-01-16 to 1996-10-20; source msha-controller-operator-history
- **controller_controls_operator:** Kenny L  Gibson → Continental Mining Company Inc; 1996-01-16 to 1996-10-20; source msha-controller-operator-history
- **operator_operates_mine:** New England Stone Industries Inc → South Carolina-Kershaw Quarry; 1996-10-21 to 2006-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → New England Stone Industries Inc; 1996-10-21 to 2006-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Antonio C  Ramos → South Carolina-Kershaw Quarry; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Stone Industries Inc → South Carolina-Kershaw Quarry; 2006-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → Georgia Stone Industries Inc; 2006-06-01 to current/open; source msha-controller-operator-history