# Relationship history for MSHA mine 0202927

Current hierarchy: **Cemex S A → Rinker Materials → Rinker Materials Fletcher/Perkinsvil Pit**

- 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:** Peter Kiewit Sons' Inc → Rinker Materials Fletcher/Perkinsvil Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** United Metro Materials Inc → Rinker Materials Fletcher/Perkinsvil Pit; 2001-03-01 to 2006-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Peter Kiewit Sons' Inc → United Metro Materials Inc; 2001-03-01 to 2006-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Rinker Materials Fletcher/Perkinsvil Pit; 2004-08-01 to 2007-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials → Rinker Materials Fletcher/Perkinsvil Pit; 2006-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials; 2006-02-14 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Rinker Materials Fletcher/Perkinsvil Pit; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials; 2007-07-10 to current/open; source msha-controller-operator-history