# Relationship history for MSHA mine 4406996

Current hierarchy: **Theodore  Yates → Har-Lee Coal Company Inc → No 10**

- 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:** Theodore  Yates et al → No 10; 1989-02-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Har-Lee Coal Company Inc → No 10; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Theodore  Yates et al → Har-Lee Coal Company Inc; 2000-06-01 to current/open; source msha-controller-operator-history