# Relationship history for MSHA mine 5001524

Current hierarchy: **Earl W  Voytilla → Voytilla Mining Ventures → Voytilla Ester Ck**

- 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:** Earl W Voytilla/John Moore → Voytilla Ester Ck; 1987-07-01 to 2014-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Earl W Voytilla/John Moore → Voytilla Ester Ck; 1987-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Earl W Voytilla/John Moore → Earl W Voytilla/John Moore; 1987-07-01 to 2014-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Voytilla Mining Ventures → Voytilla Ester Ck; 2014-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Earl W  Voytilla → Voytilla Ester Ck; 2014-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Earl W  Voytilla → Voytilla Mining Ventures; 2014-06-06 to current/open; source msha-controller-operator-history