# Relationship history for MSHA mine 4600040

Current hierarchy: **Pacifico Joe → Tony Pacifico Stone Quarry Inc → Tony Pacifico Quarry And 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:** Tony Pacifico Stone Quarry Inc → Tony Pacifico Quarry And Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pacifico Joe → Tony Pacifico Quarry And Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pacifico Joe → Tony Pacifico Stone Quarry Inc; 1950-01-01 to current/open; source msha-controller-operator-history