# Relationship history for MSHA mine 5001644

Current hierarchy: **William  Mc Donald; Derek  Guidotti → Gold Hill Mining Company → Gold Hill Mining Company**

- 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:** Gold Hill Mining Company → Gold Hill Mining Company; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Mc Donald  et al → Gold Hill Mining Company; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Mc Donald  et al → Gold Hill Mining Company; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Derek  Guidotti  et al → Gold Hill Mining Company; 1999-05-01 to current/open; source msha-controller-operator-history