# Relationship history for MSHA mine 3503444

Current hierarchy: **Richard  Jonas → Crabtree Crushing, Inc → Crabtree 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

- **operator_operates_mine:** The Saunders Company Inc → Crabtree Pit; 1997-08-01 to 2012-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Saunders → Crabtree Pit; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Saunders → The Saunders Company Inc; 1997-08-01 to 2012-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Crabtree Crushing, Inc → Crabtree Pit; 2012-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Jonas → Crabtree Pit; 2012-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Jonas → Crabtree Crushing, Inc; 2012-05-01 to current/open; source msha-controller-operator-history