# Relationship history for MSHA mine 2402606

Current hierarchy: **William  Hollow; John  Jeffery → AggQuip, LLC → Screening 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:** AggQuip, LLC → Screening Plant; 2011-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Jeffery et al → Screening Plant; 2011-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Jeffery et al → AggQuip, LLC; 2011-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Hollow et al → AggQuip, LLC; 2011-10-04 to current/open; source msha-controller-operator-history