# Relationship history for MSHA mine 3304745

Current hierarchy: **Brad  Miller → Cardinal Aggregate → Portable Plant #3**

- 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 → Portable Plant #3; 2002-04-18 to 2015-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Dean E Miller → Portable Plant #3; 2015-08-17 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Miller → Portable Plant #3; 2016-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Aggregate → Portable Plant #3; 2018-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Murray → Cardinal Aggregate; 2018-11-07 to 2015-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Miller → Cardinal Aggregate; 2018-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean E Miller → Cardinal Aggregate; 2018-11-07 to 2015-12-31; source msha-controller-operator-history