# Relationship history for MSHA mine 3304629

Current hierarchy: **Jeffrey D  Hopkins; Joseph  Schottelkotte → Ohio Stone of Lynchburg Inc → Ohio Stone of Lynchburg, Inc.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Ohio Stone of Lynchburg Inc → Ohio Stone of Lynchburg, Inc.; 2009-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey D  Hopkins et al → Ohio Stone of Lynchburg, Inc.; 2009-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey D  Hopkins et al → Ohio Stone of Lynchburg Inc; 2009-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Schottelkotte et al → Ohio Stone of Lynchburg Inc; 2009-03-31 to current/open; source msha-controller-operator-history