# Relationship history for MSHA mine 1517927

Current hierarchy: **Goddess Coal Corp LLC → New Horizons Coal Inc → Mary Helen Harlan**

- 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

- **controller_controls_mine:** Goddess Coal Corp LLC → Mary Helen Harlan; 1996-06-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New Horizons Coal Inc → Mary Helen Harlan; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goddess Coal Corp LLC → New Horizons Coal Inc; 1997-04-01 to current/open; source msha-controller-operator-history