# Relationship history for MSHA mine 4801854

Current hierarchy: **Saint-Gobain → CertainTeed Gypsum and Ceilings Manufacturing Inc → CertainTeed Cody RHP**

- 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:** Saint-Gobain → CertainTeed Cody RHP; 2007-03-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CertainTeed Gypsum and Ceilings Manufacturing Inc → CertainTeed Cody RHP; 2022-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Saint-Gobain → CertainTeed Gypsum and Ceilings Manufacturing Inc; 2022-01-03 to current/open; source msha-controller-operator-history