# Relationship history for MSHA mine 0201201

Current hierarchy: **Imerys S A → Georgia Marble Company → GEORGIA MARBLE COMPANY**

- 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:** Andrada Marble Company Inc → GEORGIA MARBLE COMPANY; 1950-01-01 to 1991-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Hartley David C → GEORGIA MARBLE COMPANY; 1950-01-01 to 1991-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Hartley David C → Andrada Marble Company Inc; 1950-01-01 to 1991-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Imerys S A → GEORGIA MARBLE COMPANY; 1989-05-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Georgia Marble Company → GEORGIA MARBLE COMPANY; 1991-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Imerys S A → Georgia Marble Company; 1991-03-25 to current/open; source msha-controller-operator-history