# Relationship history for MSHA mine 4606602

Current hierarchy: **Young John P → Jagrti Coal Company Inc → Coalbank Fork No 9a**

- 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

- **controller_controls_mine:** Young John P → Coalbank Fork No 9a; 1982-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vargas Luis → Coalbank Fork No 9a; 1982-02-12 to 1986-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Maya Energies Inc → Coalbank Fork No 9a; 1982-11-01 to 1986-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Vargas Luis → Maya Energies Inc; 1982-11-01 to 1986-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Jagrti Coal Company Inc → Coalbank Fork No 9a; 1986-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Young John P → Jagrti Coal Company Inc; 1986-02-27 to current/open; source msha-controller-operator-history