# Relationship history for MSHA mine 0901119

Current hierarchy: **Anthony Bryan  Hayes → B&H Quarries → B&H Quarries**

- 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:** Leon  Saxon → B&H Quarries; 1998-01-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leon Saxon Granite Company Inc → B&H Quarries; 1998-10-01 to 2013-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Leon  Saxon → Leon Saxon Granite Company Inc; 1998-10-01 to 2013-05-31; source msha-controller-operator-history
- **operator_operates_mine:** B&H Quarries → B&H Quarries; 2013-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anthony Bryan  Hayes → B&H Quarries; 2013-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony Bryan  Hayes → B&H Quarries; 2013-06-01 to current/open; source msha-controller-operator-history