# Relationship history for MSHA mine 3606771

Current hierarchy: **J Clifford  Forrest III → Queenstown Processing Inc → Queenstown Plant**

- 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:** Queenstown Processing Inc → Queenstown Plant; 1979-01-20 to 1996-03-17; source msha-controller-operator-history
- **controller_controls_mine:** A F Budge Mining Ltd → Queenstown Plant; 1979-01-20 to 1996-03-17; source msha-controller-operator-history
- **controller_controls_operator:** A F Budge Mining Ltd → Queenstown Processing Inc; 1979-01-20 to 1996-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Queenstown Processing Inc → Queenstown Plant; 1996-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** J Clifford  Forrest III → Queenstown Plant; 1996-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Clifford  Forrest III → Queenstown Processing Inc; 1996-03-18 to current/open; source msha-controller-operator-history