# Relationship history for MSHA mine 3003483

Current hierarchy: **Tom A  Schupp → Schupp's Land Clearing Excavating → Turbo Chiefton 800 Screen SN 5015893**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Schupp's Land Clearing Excavating → Turbo Chiefton 800 Screen SN 5015893; 2004-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom A  Schupp → Turbo Chiefton 800 Screen SN 5015893; 2004-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom A  Schupp → Schupp's Land Clearing Excavating; 2004-11-09 to current/open; source msha-controller-operator-history