# Relationship history for MSHA mine 1506214

Current hierarchy: **Cyprus Amax Minerals Company → Buckhorn Processing → Jakes Fork Tipple**

- 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:** Starfire Coal Company Inc → Jakes Fork Tipple; 1950-01-01 to 1975-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Sharpe Edward L → Jakes Fork Tipple; 1950-01-01 to 1975-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Sharpe Edward L → Starfire Coal Company Inc; 1950-01-01 to 1975-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Starfire Coal Company Inc → Jakes Fork Tipple; 1975-01-02 to 1978-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Arnold B G → Jakes Fork Tipple; 1975-01-02 to 1978-01-10; source msha-controller-operator-history
- **controller_controls_operator:** Arnold B G → Starfire Coal Company Inc; 1975-01-02 to 1978-01-10; source msha-controller-operator-history
- **operator_operates_mine:** Jakes Fork Coal Company → Jakes Fork Tipple; 1978-01-11 to 1982-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Harbert Construction Corp → Jakes Fork Tipple; 1978-01-11 to 1982-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Harbert Construction Corp → Jakes Fork Coal Company; 1978-01-11 to 1982-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Jakes Fork Tipple; 1981-09-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Buckhorn Processing → Jakes Fork Tipple; 1982-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Buckhorn Processing; 1982-02-18 to current/open; source msha-controller-operator-history