# Relationship history for MSHA mine 1900006

Current hierarchy: **Amrize Ltd → Amrize Northeast Inc. → Amrize Peabody 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Essex Bituminous Concrete Corp → Amrize Peabody Plant; 1950-01-01 to 1992-08-16; source msha-controller-operator-history
- **controller_controls_mine:** David W  Drislane → Amrize Peabody Plant; 1950-01-01 to 1992-08-16; source msha-controller-operator-history
- **controller_controls_operator:** David W  Drislane → Essex Bituminous Concrete Corp; 1950-01-01 to 1992-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Northeast Inc. → Amrize Peabody Plant; 1992-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Peabody Plant; 2001-06-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Amrize Northeast Inc.; 2001-06-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Peabody Plant; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Northeast Inc.; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Peabody Plant; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Northeast Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Peabody Plant; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Northeast Inc.; 2025-06-23 to current/open; source msha-controller-operator-history