# Relationship history for MSHA mine 0302030

Current hierarchy: **Michael E  Miller → Hamilton Aggregates, Inc. → Greers Ferry 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:** J Edward  Hamilton → Greers Ferry Quarry; 2007-03-01 to 2015-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Hamilton Aggregates, Inc. → Greers Ferry Quarry; 2012-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Edward  Hamilton → Hamilton Aggregates, Inc.; 2012-04-02 to 2015-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Michael E  Miller et al → Greers Ferry Quarry; 2015-10-01 to 2019-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Michael E  Miller et al → Hamilton Aggregates, Inc.; 2015-10-01 to 2019-09-22; source msha-controller-operator-history
- **controller_controls_operator:** J Edward  Hamilton et al → Hamilton Aggregates, Inc.; 2015-10-01 to 2019-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Michael E  Miller → Greers Ferry Quarry; 2019-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael E  Miller → Hamilton Aggregates, Inc.; 2019-09-23 to current/open; source msha-controller-operator-history