# Relationship history for MSHA mine 0202193

Current hierarchy: **Humiston George A → Carefree Mining Company → Phoenix Mine**

- 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:** Add-West Ltd → Phoenix Mine; 1984-03-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Addington Larry → Phoenix Mine; 1984-03-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Addington Larry → Add-West Ltd; 1984-03-01 to 1985-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Carefree Mining Company → Phoenix Mine; 1985-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Humiston George A Et Al → Phoenix Mine; 1985-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Humiston George A Et Al → Carefree Mining Company; 1985-04-01 to current/open; source msha-controller-operator-history