# Relationship history for MSHA mine 5001875

Current hierarchy: **Michael J  Kingsbury; Deborah M  Albert → Ellet Enterprises Inc → Channel Quest**

- 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:** Michael J  Kingsbury  et al → Channel Quest; 2001-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ellet Enterprises Inc → Channel Quest; 2008-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Kingsbury  et al → Ellet Enterprises Inc; 2008-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Deborah M  Albert  et al → Ellet Enterprises Inc; 2008-03-26 to current/open; source msha-controller-operator-history