# Relationship history for MSHA mine 2700151

Current hierarchy: **Donald  Conte → Georgia Stone Management LLC → Mason 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

- **operator_operates_mine:** Maine & New Hampshire Granite Corp → Mason Quarry; 1950-01-01 to 1985-11-26; source msha-controller-operator-history
- **controller_controls_mine:** John J  Lander Jr → Mason Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John J  Lander Jr → Maine & New Hampshire Granite Corp; 1950-01-01 to 1985-11-26; source msha-controller-operator-history
- **operator_operates_mine:** Fletcher Granite Company Inc → Mason Quarry; 1985-11-27 to 1989-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Paul A  Keany → Mason Quarry; 1985-11-27 to 1991-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Paul A  Keany → Fletcher Granite Company Inc; 1985-11-27 to 1989-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Fletcher Granite Company Inc → Mason Quarry; 1989-01-03 to 1999-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Pioneer International Ltd → Mason Quarry; 1989-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer International Ltd → Fletcher Granite Company Inc; 1989-01-03 to 1999-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Antonio C  Ramos → Mason Quarry; 1997-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** V B  Castellani  et al → Mason Quarry; 1999-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fletcher Granite Company LLC → Mason Quarry; 1999-04-02 to 2010-11-14; source msha-controller-operator-history
- **controller_controls_operator:** V B  Castellani  et al → Fletcher Granite Company LLC; 1999-04-02 to 2010-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Kathleen  Herbert et al → Fletcher Granite Company LLC; 1999-04-02 to 2010-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Stone Industries, Inc. → Mason Quarry; 2010-11-15 to 2024-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → Georgia Stone Industries, Inc.; 2010-11-15 to 2024-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Stone Management LLC → Mason Quarry; 2024-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Conte → Mason 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