# Relationship history for MSHA mine 2300228

Current hierarchy: **Robert  Trager → Farmers Stone-Trager Quarries Company → Trenton #2**

- 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:** Robert  Trager → Trenton #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wilcox Quarries → Trenton #2; 1950-01-01 to 1983-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Wilcox Jay → Trenton #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wilcox Jay → Wilcox Quarries; 1950-01-01 to 1983-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Farmers Stone-Trager Quarries Company → Trenton #2; 1983-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Trager → Farmers Stone-Trager Quarries Company; 1983-11-15 to current/open; source msha-controller-operator-history