# Relationship history for MSHA mine 0100016

Current hierarchy: **Cemex S A → CEMEX Southeast, LLC → Demopolis Plant Cemex Inc**

- 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:** Southdown Inc → Demopolis Plant Cemex Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Corp → Demopolis Plant Cemex Inc; 1950-01-01 to 1993-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Demopolis Plant Cemex Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Corp; 1950-01-01 to 1993-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Medusa Corp → Demopolis Plant Cemex Inc; 1988-10-07 to 1998-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Medusa-Citadel Inc → Demopolis Plant Cemex Inc; 1993-02-01 to 1998-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Medusa Corp → Medusa-Citadel Inc; 1993-02-01 to 1998-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Demopolis Plant Cemex Inc; 1994-09-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southdown Inc → Demopolis Plant Cemex Inc; 1998-06-30 to 2001-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Southdown Inc; 1998-06-30 to 2001-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Inc → Demopolis Plant Cemex Inc; 2001-08-27 to 2015-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Inc; 2001-08-27 to 2015-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Demopolis Plant Cemex Inc; 2010-08-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Southeast, LLC → Demopolis Plant Cemex Inc; 2015-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Southeast, LLC; 2015-07-22 to current/open; source msha-controller-operator-history