# Relationship history for MSHA mine 1601470

Current hierarchy: **Thomas M  Chowanski; Michael Q  Smith → Magnolia Mining Company LLC → Sparta Plant**

- 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:** Magnolia Mining Company LLC → Sparta Plant; 2007-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael Q  Smith et al → Sparta Plant; 2007-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael Q  Smith et al → Magnolia Mining Company LLC; 2007-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas M  Chowanski et al → Magnolia Mining Company LLC; 2007-11-01 to current/open; source msha-controller-operator-history