# Relationship history for MSHA mine 4104308

Current hierarchy: **GCC SAB de CV → GCC Sun City Materials LLC → West 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** RMC Group PLC → West Quarry; 1999-03-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jobe Concrete Products Inc → West Quarry; 2001-03-12 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_operator:** RMC Group PLC → Jobe Concrete Products Inc; 2001-03-12 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → West Quarry; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX El Paso Inc → West Quarry; 2005-03-01 to 2005-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → West Quarry; 2005-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX El Paso Inc; 2005-03-01 to 2005-03-29; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials LP → West Quarry; 2005-03-30 to 2010-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials LP; 2005-03-30 to 2010-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → West Quarry; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials South, LLC → West Quarry; 2010-04-16 to 2016-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials South, LLC; 2010-04-16 to 2016-11-18; source msha-controller-operator-history
- **operator_operates_mine:** GCC Sun City Materials LLC → West Quarry; 2016-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** GCC SAB de CV → West Quarry; 2016-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** GCC SAB de CV → GCC Sun City Materials LLC; 2016-11-19 to current/open; source msha-controller-operator-history