# Relationship history for MSHA mine 0401696

Current hierarchy: **Milan  Lubanko → L&G Portable Crushing and Materials → Azusa 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

- **operator_operates_mine:** Transit Mixed Concrete Company → Azusa Quarry; 1950-01-01 to 1990-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Transmix Corp → Azusa Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Transmix Corp → Transit Mixed Concrete Company; 1950-01-01 to 1990-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Southdown California Aggregates → Azusa Quarry; 1990-02-08 to 2001-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Southdown Inc → Azusa Quarry; 1990-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Southdown California Aggregates; 1990-02-08 to 2001-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Azusa Quarry; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials LP → Azusa Quarry; 2002-01-01 to 2010-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials LP; 2002-01-01 to 2010-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Azusa Quarry; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Pacific, LLC → Azusa Quarry; 2010-02-24 to 2018-05-24; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials Pacific, LLC; 2010-02-24 to 2018-05-24; source msha-controller-operator-history
- **controller_controls_mine:** Milan  Lubanko et al → Azusa Quarry; 2014-03-28 to 2019-12-31; source msha-controller-operator-history
- **operator_operates_mine:** L&G Portable Crushing and Materials → Azusa Quarry; 2018-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milan  Lubanko et al → L&G Portable Crushing and Materials; 2018-05-25 to 2019-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Greenleaf et al → L&G Portable Crushing and Materials; 2018-05-25 to 2019-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Milan  Lubanko → Azusa Quarry; 2020-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milan  Lubanko → L&G Portable Crushing and Materials; 2020-01-01 to current/open; source msha-controller-operator-history