# Relationship history for MSHA mine 0600644

Current hierarchy: **John  Olender Jr → New England Crushed Products Inc → Thompson Pit**

- 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:** John  Olender Jr et al → Thompson Pit; 1988-12-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New England Crushed Products Inc → Thompson Pit; 1995-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Olender Jr et al → New England Crushed Products Inc; 1995-05-01 to current/open; source msha-controller-operator-history