# Relationship history for MSHA mine 0400173

Current hierarchy: **Cemex S A → CEMEX Construction Materials Pacific, LLC → Clayton 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Lone Star Industries Inc → Clayton Plant; 1950-01-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Lone Star Industries Inc → Clayton Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lone Star Industries Inc → Lone Star Industries Inc; 1950-01-01 to 1987-12-31; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX → Clayton Plant; 1988-01-01 to 2006-11-30; source msha-controller-operator-history
- **controller_controls_mine:** RMC Group PLC → Clayton Plant; 1988-01-01 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_operator:** RMC Group PLC → CEMEX; 1988-01-01 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Clayton Plant; 2001-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Clayton Plant; 2005-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX; 2005-03-01 to 2006-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials LP → Clayton Plant; 2006-12-01 to 2009-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials LP; 2006-12-01 to 2009-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Clayton Plant; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Pacific, LLC → Clayton Plant; 2009-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials Pacific, LLC; 2009-03-29 to current/open; source msha-controller-operator-history