# Relationship history for MSHA mine 4608861

Current hierarchy: **(Earl) Mac  Quick → Muddy Creek Mountain Stone Inc → Muddy Creek Mountain 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

- **operator_operates_mine:** Muddy Creek Mountain Stone Inc → Muddy Creek Mountain Stone; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** (Earl) Mac  Quick → Muddy Creek Mountain Stone; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (Earl) Mac  Quick → Muddy Creek Mountain Stone Inc; 2000-11-01 to current/open; source msha-controller-operator-history