# Relationship history for MSHA mine 3609389

Current hierarchy: **Matthew S  Postupack; Wayne S  Postupack → Post Mining → Branchdale Job**

- 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:** Post Mining → Branchdale Job; 2006-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wayne S  Postupack et al → Branchdale Job; 2006-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne S  Postupack et al → Post Mining; 2006-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew S  Postupack et al → Post Mining; 2006-02-24 to current/open; source msha-controller-operator-history