# Relationship history for MSHA mine 3602049

Current hierarchy: **Woratyla Andrew → Woratyla Coal Company Inc → Mammoth Slope**

- 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:** Woratyla Coal Company Inc → Mammoth Slope; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Woratyla Andrew → Mammoth Slope; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Woratyla Andrew → Woratyla Coal Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history