# Relationship history for MSHA mine 2300284

Current hierarchy: **Amrize Ltd → Amrize Cement Inc. → Amrize Ste Genevieve 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Riverstone Group → Amrize Ste Genevieve Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Ste Genevieve Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** West Point Stone Company → Amrize Ste Genevieve Plant; 1950-01-01 to 1983-11-21; source msha-controller-operator-history
- **controller_controls_mine:** West Point Stone Company → Amrize Ste Genevieve Plant; 1950-01-01 to 1983-11-21; source msha-controller-operator-history
- **controller_controls_operator:** West Point Stone Company → West Point Stone Company; 1950-01-01 to 1983-11-21; source msha-controller-operator-history
- **operator_operates_mine:** Moline Consumers Company → Amrize Ste Genevieve Plant; 1983-11-22 to 2000-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Riverstone Group → Moline Consumers Company; 1983-11-22 to 2000-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Holnam Inc → Amrize Ste Genevieve Plant; 2000-10-23 to 2001-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Holnam Inc; 2000-10-23 to 2001-12-11; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Cement Inc. → Amrize Ste Genevieve Plant; 2001-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Ste Genevieve Plant; 2001-12-12 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Cement Inc.; 2001-12-12 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Ste Genevieve Plant; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Cement Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Ste Genevieve Plant; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Cement Inc.; 2025-06-23 to current/open; source msha-controller-operator-history