# Relationship history for MSHA mine 0405494

Current hierarchy: **Jeff C  Halloran → Wyroc Inc → Wyroc Apple Valley**

- 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

- **controller_controls_mine:** Jeff C  Halloran → Wyroc Apple Valley; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wyroc Inc → Wyroc Apple Valley; 2001-08-01 to 2008-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Jeff C  Halloran → Wyroc Inc; 2001-08-01 to 2008-09-02; source msha-controller-operator-history
- **operator_operates_mine:** Wyroc Inc → Wyroc Apple Valley; 2008-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeff C  Halloran → Wyroc Apple Valley; 2008-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff C  Halloran → Wyroc Inc; 2008-09-03 to current/open; source msha-controller-operator-history