# Relationship history for MSHA mine 3304608

Current hierarchy: **Brad  Miller → Cardinal Aggregates Inc → Cardinal Aggregates Inc Portable 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

- **controller_controls_mine:** Mark  Murray → Cardinal Aggregates Inc Portable Plant; 2002-04-18 to 2015-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Aggregates Inc → Cardinal Aggregates Inc Portable Plant; 2008-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Murray → Cardinal Aggregates Inc; 2008-06-02 to 2015-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Dean E Miller → Cardinal Aggregates Inc Portable Plant; 2015-08-17 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Dean E Miller → Cardinal Aggregates Inc; 2015-08-17 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Miller → Cardinal Aggregates Inc Portable Plant; 2016-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Miller → Cardinal Aggregates Inc; 2016-01-01 to current/open; source msha-controller-operator-history