# Relationship history for MSHA mine 0203416

Current hierarchy: **David  Heath; Debbie  Pickard → D & O Crane → Drake Ore Mine-south**

- 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:** D & O Crane → Drake Ore Mine-south; 2019-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Debbie  Pickard et al → Drake Ore Mine-south; 2019-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Debbie  Pickard et al → D & O Crane; 2019-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Heath et al → D & O Crane; 2019-06-10 to current/open; source msha-controller-operator-history