# Relationship history for MSHA mine 4600027

Current hierarchy: **Amrize Ltd → Amrize Mid-Atlantic Inc. → Amrize Millville 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Aggregate Industries PLC → Amrize Millville Quarry; 1950-01-01 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Millville Quarry Inc → Amrize Millville Quarry; 1950-01-01 to 1990-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Manus H  Perkins → Amrize Millville Quarry; 1950-01-01 to 1990-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Manus H  Perkins → Millville Quarry Inc; 1950-01-01 to 1990-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Millville Quarry Inc → Amrize Millville Quarry; 1990-01-05 to 2011-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Millville Quarry; 1990-01-05 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Millville Quarry Inc; 1990-01-05 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Millville Quarry; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Millville Quarry; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Millville Quarry Inc; 2009-04-30 to 2011-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Mid-Atlantic Inc. → Amrize Millville Quarry; 2011-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Mid-Atlantic Inc.; 2011-07-01 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Amrize Mid-Atlantic Inc.; 2011-07-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Millville Quarry; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Mid-Atlantic Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Millville Quarry; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Mid-Atlantic Inc.; 2025-06-23 to current/open; source msha-controller-operator-history