# Relationship history for MSHA mine 0302091

Current hierarchy: **Michael Shane Hatfield; Michael Wayne Hatfield → Hatfield Ready Mix, Inc → Hatfield Ready Mix, Inc-Aggregate Divisi**

- 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:** Hatfield Ready Mix, Inc → Hatfield Ready Mix, Inc-Aggregate Divisi; 2024-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael Shane Hatfield et al → Hatfield Ready Mix, Inc-Aggregate Divisi; 2024-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael Shane Hatfield et al → Hatfield Ready Mix, Inc; 2024-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael Wayne Hatfield et al → Hatfield Ready Mix, Inc; 2024-05-22 to current/open; source msha-controller-operator-history