# Relationship history for MSHA mine 4101066

Current hierarchy: **GCC SAB de CV → GCC Sun City Materials LLC → McCombs 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:** El Paso Sand Products Inc → McCombs Quarry; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Sand Products Inc → McCombs Quarry; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Sand Products Inc → El Paso Sand Products Inc; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **operator_operates_mine:** El Paso Sand Products Inc → McCombs Quarry; 1983-03-01 to 1990-08-16; source msha-controller-operator-history
- **controller_controls_mine:** General Dynamics Corp → McCombs Quarry; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** General Dynamics Corp → El Paso Sand Products Inc; 1983-03-01 to 1990-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Stanley P  Jobe et al → McCombs Quarry; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jobe Concrete Products Inc → McCombs Quarry; 1990-08-17 to 1999-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Stanley P  Jobe et al → Jobe Concrete Products Inc; 1990-08-17 to 1999-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Irene  Epperson et al → Jobe Concrete Products Inc; 1990-08-17 to 1999-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Jobe Concrete Products Inc → McCombs Quarry; 1999-03-31 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** RMC Group PLC → McCombs Quarry; 1999-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RMC Group PLC → Jobe Concrete Products Inc; 1999-03-31 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → McCombs Quarry; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX El Paso Inc → McCombs Quarry; 2005-03-01 to 2005-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → McCombs 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 → McCombs Quarry; 2005-03-30 to 2008-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials LP; 2005-03-30 to 2008-07-31; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials South LLC → McCombs Quarry; 2008-08-01 to 2016-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → McCombs Quarry; 2008-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials South LLC; 2008-08-01 to 2016-11-18; source msha-controller-operator-history
- **operator_operates_mine:** GCC Sun City Materials LLC → McCombs Quarry; 2016-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** GCC SAB de CV → McCombs 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