# Relationship history for MSHA mine 3609945

Current hierarchy: **Jerry L  Johnson → Johnson Quarries Inc → Warner 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:** Jerry L  Johnson → Warner Quarry; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R. Johnson Stone → Warner Quarry; 2011-07-13 to 2018-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Richard L  Johnson → Warner Quarry; 2011-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard L  Johnson → R. Johnson Stone; 2011-07-13 to 2018-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Quarries Inc → Warner Quarry; 2018-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry L  Johnson → Johnson Quarries Inc; 2018-06-20 to current/open; source msha-controller-operator-history