# Relationship history for MSHA mine 1514420

Current hierarchy: **Christian Richard A → Black Sunshine Coal Corp → #1 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:** Black Sunshine Coal Corp → #1 Tipple; 1984-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christian Richard A → #1 Tipple; 1984-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian Richard A → Black Sunshine Coal Corp; 1984-01-01 to current/open; source msha-controller-operator-history