# Relationship history for MSHA mine 0202003

Current hierarchy: **Cemex S A → CEMEX Construction Materials South LLC → CEMEX - EL MIRAGE**

- 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:** Ashton Materials Corp → CEMEX - EL MIRAGE; 1980-07-01 to 1982-12-06; source msha-controller-operator-history
- **controller_controls_mine:** L E  Ashton → CEMEX - EL MIRAGE; 1980-07-01 to 1982-12-06; source msha-controller-operator-history
- **controller_controls_operator:** L E  Ashton → Ashton Materials Corp; 1980-07-01 to 1982-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Columbia Materials → CEMEX - EL MIRAGE; 1982-12-07 to 1984-05-02; source msha-controller-operator-history
- **controller_controls_mine:** Roland  May → CEMEX - EL MIRAGE; 1982-12-07 to 1986-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Roland  May → Columbia Materials; 1982-12-07 to 1984-05-02; source msha-controller-operator-history
- **operator_operates_mine:** Blue Circle West → CEMEX - EL MIRAGE; 1984-05-03 to 1989-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Blue Circle Industries Plc → CEMEX - EL MIRAGE; 1984-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blue Circle Industries Plc → Blue Circle West; 1984-05-03 to 1989-07-31; source msha-controller-operator-history
- **operator_operates_mine:** B C W Inc → CEMEX - EL MIRAGE; 1989-08-01 to 1990-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Empresas Tolteca → CEMEX - EL MIRAGE; 1989-08-01 to 1990-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Empresas Tolteca → B C W Inc; 1989-08-01 to 1990-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Sunward Materials → CEMEX - EL MIRAGE; 1990-10-01 to 2001-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CEMEX - EL MIRAGE; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Sunward Materials; 1990-10-01 to 2001-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CEMEX - EL MIRAGE; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials Inc. → CEMEX - EL MIRAGE; 2001-07-12 to 2003-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials Inc.; 2001-07-12 to 2003-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials LP → CEMEX - EL MIRAGE; 2003-08-12 to 2008-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials LP; 2003-08-12 to 2008-07-31; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials South LLC → CEMEX - EL MIRAGE; 2008-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CEMEX - EL MIRAGE; 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 current/open; source msha-controller-operator-history