# Relationship history for MSHA mine 1500024

Current hierarchy: **Vernon L  Gary; Elmond  Gary → Gary Brothers Crushed Stone Company → Gary Brothers No 2 Quarry And Mill**

- 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:** Gary Brothers Crushed Stone Company → Gary Brothers No 2 Quarry And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elmond  Gary  et al → Gary Brothers No 2 Quarry And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmond  Gary  et al → Gary Brothers Crushed Stone Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vernon L  Gary  et al → Gary Brothers Crushed Stone Company; 1950-01-01 to current/open; source msha-controller-operator-history