# Relationship history for MSHA mine 1202447

Current hierarchy: **Jeffrey D  Hopkins; Joseph  Schottelkotte → Ohio Stone of Indiana Inc - Derbyshire → Newpoint Stone Co - Derbyshire Quarry**

- 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:** Joseph  Schottelkotte et al → Newpoint Stone Co - Derbyshire Quarry; 2010-09-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ohio Stone of Indiana Inc - Derbyshire → Newpoint Stone Co - Derbyshire Quarry; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Schottelkotte et al → Ohio Stone of Indiana Inc - Derbyshire; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey D  Hopkins et al → Ohio Stone of Indiana Inc - Derbyshire; 2011-10-05 to current/open; source msha-controller-operator-history