# Relationship history for MSHA mine 4102885

Current hierarchy: **Cemex S A → CEMEX Construction Materials South, LLC → Balcones Plant**

- 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:** General Portland Inc → Balcones Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Balcones Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** General Portland Inc → Balcones Plant; 1979-01-01 to 1981-11-11; source msha-controller-operator-history
- **controller_controls_operator:** General Portland Inc → General Portland Inc; 1979-01-01 to 1981-11-11; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Corp → Balcones Plant; 1981-11-12 to 1994-09-08; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Corp; 1981-11-12 to 1994-09-08; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Usa Cement Of Texas Inc → Balcones Plant; 1994-09-09 to 2002-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Balcones Plant; 1994-09-09 to 2002-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Usa Cement Of Texas Inc; 1994-09-09 to 2002-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Balcones Plant; 1994-09-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Inc → Balcones Plant; 2002-03-28 to 2010-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Inc; 2002-03-28 to 2010-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Balcones Plant; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials South, LLC → Balcones Plant; 2010-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials South, LLC; 2010-03-01 to current/open; source msha-controller-operator-history