# Relationship history for MSHA mine 3200873

Current hierarchy: **Kyle S  Hexom; Nathan R  Hexom → HEXCO, LLC → Tuboscope**

- 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:** HEXCO, LLC → Tuboscope; 2010-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kyle S  Hexom et al → Tuboscope; 2010-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kyle S  Hexom et al → HEXCO, LLC; 2010-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nathan R  Hexom et al → HEXCO, LLC; 2010-10-05 to current/open; source msha-controller-operator-history