# Relationship history for MSHA mine 2902220

Current hierarchy: **Richard P  Cook → Organ Quarry Inc. → Organ 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:** Organ Quarry Inc. → Organ Quarry Inc; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard P  Cook → Organ Quarry Inc; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard P  Cook → Organ Quarry Inc.; 2001-05-01 to current/open; source msha-controller-operator-history