# Relationship history for MSHA mine 4608766

Current hierarchy: **West John E → Beech Run Corp → Beech Run Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Beech Run Corp → Beech Run Quarry; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** West John E → Beech Run Quarry; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** West John E → Beech Run Corp; 1999-04-01 to current/open; source msha-controller-operator-history