# Relationship history for MSHA mine 0901224

Current hierarchy: **Polycor Inc → Polycor Georgia Granite Quarries Inc. → Eagles Danburg Quarry Inc**

- 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

- **operator_operates_mine:** Eagles Danburg Quarry Inc → Eagles Danburg Quarry Inc; 2013-09-01 to 2024-03-04; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Paul → Eagles Danburg Quarry Inc; 2013-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Paul → Eagles Danburg Quarry Inc; 2013-09-01 to 2024-03-04; source msha-controller-operator-history
- **controller_controls_mine:** Polycor Inc → Eagles Danburg Quarry Inc; 2024-03-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Polycor Georgia Granite Quarries Inc. → Eagles Danburg Quarry Inc; 2024-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Polycor Inc → Polycor Georgia Granite Quarries Inc.; 2024-03-05 to current/open; source msha-controller-operator-history