# Relationship history for MSHA mine 0901013

Current hierarchy: **Donald  Conte → Georgia Stone Management LLC → Oconee 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:** Antonio C  Ramos → Oconee Quarry; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New England Stone Industries Inc → Oconee Quarry; 1988-02-01 to 1996-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → New England Stone Industries Inc; 1988-02-01 to 1996-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Kenny L  Gibson → Oconee Quarry; 1995-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Continental Mining Company Inc → Oconee Quarry; 1996-01-16 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Kenny L  Gibson → Continental Mining Company Inc; 1996-01-16 to 1996-12-31; source msha-controller-operator-history
- **operator_operates_mine:** New England Stone Industries Inc → Oconee Quarry; 1997-01-01 to 2005-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → New England Stone Industries Inc; 1997-01-01 to 2005-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Antonio C  Ramos → Oconee Quarry; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Stone Ind Inc → Oconee Quarry; 2005-07-19 to 2024-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → Georgia Stone Ind Inc; 2005-07-19 to 2024-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Stone Management LLC → Oconee Quarry; 2024-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Conte → Oconee Quarry; 2024-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Conte → Georgia Stone Management LLC; 2024-09-10 to current/open; source msha-controller-operator-history