# Relationship history for MSHA mine 4100046

Current hierarchy: **GCC SAB de CV → GCC Sun City Materials LLC → McKelligon Canyon**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** El Paso Rock Quarries Inc → McKelligon Canyon; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Sand Products Inc → McKelligon Canyon; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Sand Products Inc → El Paso Rock Quarries Inc; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **operator_operates_mine:** El Paso Sand Products Inc → McKelligon Canyon; 1983-03-01 to 1990-08-16; source msha-controller-operator-history
- **controller_controls_mine:** General Dynamics Corp → McKelligon Canyon; 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:** Irene  Epperson et al → McKelligon Canyon; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jobe Concrete Products Inc → McKelligon Canyon; 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
- **controller_controls_operator:** Stanley P  Jobe 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 → McKelligon Canyon; 1999-03-31 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** RMC Group PLC → McKelligon Canyon; 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 → McKelligon Canyon; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX El Paso Inc → McKelligon Canyon; 2005-03-01 to 2005-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → McKelligon Canyon; 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 → McKelligon Canyon; 2005-03-30 to 2008-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials LP; 2005-03-30 to 2008-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → McKelligon Canyon; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials South LLC → McKelligon Canyon; 2008-08-20 to 2016-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials South LLC; 2008-08-20 to 2016-11-18; source msha-controller-operator-history
- **operator_operates_mine:** GCC Sun City Materials LLC → McKelligon Canyon; 2016-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** GCC SAB de CV → McKelligon Canyon; 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