# Relationship history for MSHA mine 5002023

Current hierarchy: **Roberta  Tew; Clayton M Tew → Tew's Inc → Tew's Inc**

- 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:** Tew's Inc → Tew's Inc; 2014-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roberta  Tew et al → Tew's Inc; 2014-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roberta  Tew et al → Tew's Inc; 2014-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clayton M Tew et al → Tew's Inc; 2014-07-31 to current/open; source msha-controller-operator-history