# Relationship history for MSHA mine 3800586

Current hierarchy: **Donald  Conte → Georgia Stone Management LLC → CORAL GRAY 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Thomas F  Purner → CORAL GRAY QUARRY; 1950-01-01 to 1992-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Matthews International Corp → CORAL GRAY QUARRY; 1981-07-01 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Thomas F  Purner → Matthews International Corp; 1981-07-01 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_mine:** George T  Oglesby → CORAL GRAY QUARRY; 1992-05-22 to 1997-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Carolina Quarries Inc → CORAL GRAY QUARRY; 1992-06-01 to 1997-10-31; source msha-controller-operator-history
- **controller_controls_operator:** George T  Oglesby → Carolina Quarries Inc; 1992-06-01 to 1997-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Antonio C  Ramos → CORAL GRAY QUARRY; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carolina Quarries Inc → CORAL GRAY QUARRY; 1997-11-01 to 2007-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Kurt M  Swenson → CORAL GRAY QUARRY; 1997-11-01 to 2016-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Kurt M  Swenson → Carolina Quarries Inc; 1997-11-01 to 2007-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Stone Industries Inc. → CORAL GRAY QUARRY; 2007-06-01 to 2024-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → Georgia Stone Industries Inc.; 2007-06-01 to 2024-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Polycor Inc → CORAL GRAY QUARRY; 2016-09-21 to 2023-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Polycor Inc → Carolina Quarries Inc; 2016-09-21 to 2007-05-31; source msha-controller-operator-history
- **controller_controls_mine:** TorQuest Partners Inc → CORAL GRAY QUARRY; 2023-02-16 to 2023-08-31; source msha-controller-operator-history
- **controller_controls_operator:** TorQuest Partners Inc → Carolina Quarries Inc; 2023-02-16 to 2007-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Polycor Inc → CORAL GRAY QUARRY; 2023-09-01 to 2026-01-27; source msha-controller-operator-history
- **controller_controls_operator:** Polycor Inc → Carolina Quarries Inc; 2023-09-01 to 2007-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Stone Management LLC → CORAL GRAY QUARRY; 2024-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Conte → CORAL GRAY 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
- **controller_controls_mine:** Martin Marietta Materials Inc → CORAL GRAY QUARRY; 2026-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Carolina Quarries Inc; 2026-01-28 to 2007-05-31; source msha-controller-operator-history