# Relationship history for MSHA mine 3800579

Current hierarchy: **Antonio C  Ramos → Georgia Stone Industries, Inc. → South Carolina Pink**

- 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:** William  Swift et al → South Carolina Pink; 1950-01-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Midlands Palmetto Quarries → South Carolina Pink; 1981-01-01 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Henry Thomas  Mercer  et al → South Carolina Pink; 1981-01-01 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Henry Thomas  Mercer  et al → Midlands Palmetto Quarries; 1981-01-01 to 1987-09-30; source msha-controller-operator-history
- **operator_operates_mine:** N C Granite Corp → South Carolina Pink; 1987-10-01 to 2006-12-31; source msha-controller-operator-history
- **controller_controls_operator:** William  Swift et al → N C Granite Corp; 1987-10-01 to 2006-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Antonio C  Ramos → South Carolina Pink; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Stone Industries, Inc. → South Carolina Pink; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antonio C  Ramos → Georgia Stone Industries, Inc.; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Polycor Inc → South Carolina Pink; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Polycor Inc → N C Granite Corp; 2021-01-01 to 2006-12-31; source msha-controller-operator-history