# Relationship history for MSHA mine 3301463

Current hierarchy: **Collin  Ernst → Ernst Aggregates → Eagle Materials LLC DBA Ernst AggPlant 7**

- 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:** George E  Kling → Eagle Materials LLC DBA Ernst AggPlant 7; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Martz Concrete Company Inc → Eagle Materials LLC DBA Ernst AggPlant 7; 1950-01-01 to 2008-05-15; source msha-controller-operator-history
- **controller_controls_mine:** James V  Martz et al → Eagle Materials LLC DBA Ernst AggPlant 7; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James V  Martz et al → Martz Concrete Company Inc; 1950-01-01 to 2008-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Dale R  Martz et al → Martz Concrete Company Inc; 1950-01-01 to 2008-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Moraine Materials Company → Eagle Materials LLC DBA Ernst AggPlant 7; 2008-05-16 to 2010-10-18; source msha-controller-operator-history
- **controller_controls_operator:** George E  Kling → Moraine Materials Company; 2008-05-16 to 2010-10-18; source msha-controller-operator-history
- **operator_operates_mine:** Central Ready Mix L.L.C. → Eagle Materials LLC DBA Ernst AggPlant 7; 2010-10-19 to 2013-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Robert R  Cherry → Eagle Materials LLC DBA Ernst AggPlant 7; 2010-10-19 to 2011-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Cherry → Central Ready Mix L.L.C.; 2010-10-19 to 2011-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Justin  Blomberg → Eagle Materials LLC DBA Ernst AggPlant 7; 2011-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin  Blomberg → Central Ready Mix L.L.C.; 2011-08-29 to 2013-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Ernst Aggregates → Eagle Materials LLC DBA Ernst AggPlant 7; 2013-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Ernst → Eagle Materials LLC DBA Ernst AggPlant 7; 2013-11-16 to 2025-12-31; source msha-controller-operator-history
- **controller_controls_operator:** John  Ernst → Ernst Aggregates; 2013-11-16 to 2025-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Collin  Ernst → Eagle Materials LLC DBA Ernst AggPlant 7; 2026-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Collin  Ernst → Ernst Aggregates; 2026-01-01 to current/open; source msha-controller-operator-history