# Relationship history for MSHA mine 1002397

Current hierarchy: **John  Goetz; Stacy  Hunt; Douglas  Ross → Northfork Crushing → Portable**

- 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:** Northfork Crushing → Portable; 2026-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stacy  Hunt et al → Portable; 2026-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacy  Hunt et al → Northfork Crushing; 2026-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Ross et al → Northfork Crushing; 2026-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Goetz et al → Northfork Crushing; 2026-06-30 to current/open; source msha-controller-operator-history