# Relationship history for MSHA mine 0900996

Current hierarchy: **Lakshmi  Anandan; Anand Su Anandan → Century Granite Company Inc → Georgia Blue Stone**

- 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:** Tyler George B → Georgia Blue Stone; 1950-01-01 to 2023-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Bluestone Quarries, Inc. → Georgia Blue Stone; 1987-02-01 to 2023-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Edwin J  Booth Jr → Georgia Blue Stone; 1987-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edwin J  Booth Jr → Bluestone Quarries, Inc.; 1987-02-01 to 2023-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Century Granite Company Inc → Georgia Blue Stone; 2023-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lakshmi  Anandan et al → Georgia Blue Stone; 2023-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lakshmi  Anandan et al → Century Granite Company Inc; 2023-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anand Su Anandan et al → Century Granite Company Inc; 2023-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tyler George B → Century Granite Company Inc; 2023-10-10 to 2023-10-09; source msha-controller-operator-history