# Relationship history for MSHA mine 4800629

Current hierarchy: **Saint-Gobain → Certainteed Gypsum and Ceiling Manufacturing Inc → Certainteed Cody Quarry**

- 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:** Pat O'Hara Company → Certainteed Cody Quarry; 1950-01-01 to 1999-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Jesse M Taggart → Certainteed Cody Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jesse M Taggart → Pat O'Hara Company; 1950-01-01 to 1999-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Asbestos Settlement Trust → Certainteed Cody Quarry; 1997-05-30 to 2000-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Celotex Corp → Certainteed Cody Quarry; 1999-01-04 to 2000-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Asbestos Settlement Trust → Celotex Corp; 1999-01-04 to 2000-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Bpb Celotex → Certainteed Cody Quarry; 2000-07-26 to 2004-01-18; source msha-controller-operator-history
- **controller_controls_mine:** BPB Plc → Certainteed Cody Quarry; 2000-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BPB Plc → Bpb Celotex; 2000-07-26 to 2004-01-18; source msha-controller-operator-history
- **controller_controls_mine:** BPB Plc → Certainteed Cody Quarry; 2003-03-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BPB Manufacturing → Certainteed Cody Quarry; 2004-01-19 to 2009-12-31; source msha-controller-operator-history
- **controller_controls_operator:** BPB Plc → BPB Manufacturing; 2004-01-19 to 2009-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Saint-Gobain → Certainteed Cody Quarry; 2007-03-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Certainteed Gypsum and Ceiling Manufacturing Inc → Certainteed Cody Quarry; 2010-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Saint-Gobain → Certainteed Gypsum and Ceiling Manufacturing Inc; 2010-01-01 to current/open; source msha-controller-operator-history