# Relationship history for MSHA mine 2602278

Current hierarchy: **Cemex S A → CEMEX Construction Materials Pacific LLC → El Dorado 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:** Hanson PLC → El Dorado Quarry; 1988-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → El Dorado Quarry; 1990-02-02 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Lopke Granite Products Inc → El Dorado Quarry; 1995-05-01 to 1998-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Frank S  Lopke → El Dorado Quarry; 1995-05-01 to 1998-01-23; source msha-controller-operator-history
- **controller_controls_operator:** Frank S  Lopke → Lopke Granite Products Inc; 1995-05-01 to 1998-01-23; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates-Las Vegas Inc → El Dorado Quarry; 1998-01-24 to 2001-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates-Las Vegas Inc; 1998-01-24 to 2001-09-16; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX → El Dorado Quarry; 2001-09-17 to 2009-07-05; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → CEMEX; 2001-09-17 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → El Dorado Quarry; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → CEMEX; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → El Dorado Quarry; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX; 2007-07-10 to 2009-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → El Dorado Quarry; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Pacific LLC → El Dorado Quarry; 2009-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials Pacific LLC; 2009-07-06 to current/open; source msha-controller-operator-history