# Relationship history for MSHA mine 1300435

Current hierarchy: **Saint-Gobain → Western Mining and Minerals Inc. → Pleasant Valley Mine**

- 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:** Celotex Corp → Pleasant Valley Mine; 1950-01-01 to 1997-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Jim Walter Corp → Pleasant Valley Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim Walter Corp → Celotex Corp; 1950-01-01 to 1997-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Celotex Corp → Pleasant Valley Mine; 1997-05-30 to 2000-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Asbestos Settlement Trust → Pleasant Valley Mine; 1997-05-30 to 2000-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Asbestos Settlement Trust → Celotex Corp; 1997-05-30 to 2000-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Bpb America Inc → Pleasant Valley Mine; 2000-07-26 to 2003-03-19; source msha-controller-operator-history
- **controller_controls_mine:** BPB Plc → Pleasant Valley Mine; 2000-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BPB Plc → Bpb America Inc; 2000-07-26 to 2003-03-19; source msha-controller-operator-history
- **controller_controls_mine:** James Hardie Industries Ltd → Pleasant Valley Mine; 2000-12-15 to 2002-04-23; source msha-controller-operator-history
- **controller_controls_mine:** BPB Plc → Pleasant Valley Mine; 2002-04-24 to 2007-01-08; source msha-controller-operator-history
- **operator_operates_mine:** BPB Manufacturing Inc → Pleasant Valley Mine; 2003-03-20 to 2007-04-30; source msha-controller-operator-history
- **controller_controls_mine:** BPB Plc → Pleasant Valley Mine; 2003-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BPB Plc → BPB Manufacturing Inc; 2003-03-20 to 2007-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Saint-Gobain → Pleasant Valley Mine; 2007-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Saint-Gobain → Pleasant Valley Mine; 2007-03-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CertainTeed Gypsum & Ceiling Manufacturing Inc → Pleasant Valley Mine; 2007-05-01 to 2024-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Saint-Gobain → CertainTeed Gypsum & Ceiling Manufacturing Inc; 2007-05-01 to 2024-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Western Mining and Minerals Inc. → Pleasant Valley Mine; 2024-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Hardie Industries Ltd → Western Mining and Minerals Inc.; 2024-03-06 to 2002-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Saint-Gobain → Western Mining and Minerals Inc.; 2024-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BPB Plc → Western Mining and Minerals Inc.; 2024-03-06 to 2007-01-08; source msha-controller-operator-history