# Relationship history for MSHA mine 4300500

Current hierarchy: **Christopher  Smid → New England Slate → Eagle 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** William A  Turner et al → Eagle Quarry; 1985-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** U S Quarried Slate Products Inc → Eagle Quarry; 1996-09-01 to 2006-02-01; source msha-controller-operator-history
- **controller_controls_operator:** William A  Turner et al → U S Quarried Slate Products Inc; 1996-09-01 to 2006-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Double D Mining → Eagle Quarry; 2006-02-02 to 2014-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Dave  Socinski → Eagle Quarry; 2006-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Socinski → Double D Mining; 2006-02-02 to 2014-10-29; source msha-controller-operator-history
- **operator_operates_mine:** New England Slate → Eagle Quarry; 2014-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christopher  Smid → Eagle Quarry; 2014-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Smid → New England Slate; 2014-10-30 to current/open; source msha-controller-operator-history