# Relationship history for MSHA mine 1519506

Current hierarchy: **James T  Stephens; Paul  Alexander → Blackstone Coal Company LLC → No. 2**

- 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:** James T  Stephens  et al → No. 2; 2008-01-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blackstone Coal Company LLC → No. 2; 2010-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James T  Stephens  et al → Blackstone Coal Company LLC; 2010-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Alexander  et al → Blackstone Coal Company LLC; 2010-06-08 to current/open; source msha-controller-operator-history