# Relationship history for MSHA mine 0401906

Current hierarchy: **Cemex S A → CEMEX Construction Materials Pacific, LLC → Patterson 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

- **operator_operates_mine:** Patterson Sand & Gravel → Patterson Plant; 1950-01-01 to 1999-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Darren  Morehead → Patterson Plant; 1950-01-01 to 1999-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Darren  Morehead → Patterson Sand & Gravel; 1950-01-01 to 1999-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Automatic Aggregate System Inc → Patterson Plant; 1999-10-26 to 2006-02-05; source msha-controller-operator-history
- **controller_controls_mine:** RMC Group PLC → Patterson Plant; 1999-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RMC Group PLC → Automatic Aggregate System Inc; 1999-10-26 to 2006-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Patterson Plant; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials LP → Patterson Plant; 2006-02-06 to 2013-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials LP; 2006-02-06 to 2013-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Patterson Plant; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Pacific, LLC → Patterson Plant; 2013-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials Pacific, LLC; 2013-04-01 to current/open; source msha-controller-operator-history