# Relationship history for MSHA mine 2601845

Current hierarchy: **Amrize Ltd → Amrize Southwest Inc. → Amrize Sloan Quarry #1001**

- 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

- **controller_controls_mine:** Floyd A  Meldrum → Amrize Sloan Quarry #1001; 1950-01-01 to 2003-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Bardon Materials Inc → Amrize Sloan Quarry #1001; 1983-05-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Garth  Frehner → Amrize Sloan Quarry #1001; 1983-08-01 to 2004-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Garth  Frehner → Bardon Materials Inc; 1983-08-01 to 2004-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Sloan Quarry #1001; 1997-05-14 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Sloan Quarry #1001; 2003-12-15 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Sloan Quarry #1001; 2004-05-10 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Bardon Materials Inc; 2004-05-10 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Southern Nevada Paving Inc → Amrize Sloan Quarry #1001; 2009-04-30 to 2010-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Floyd A  Meldrum → Southern Nevada Paving Inc; 2009-04-30 to 2003-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Sloan Quarry #1001; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Bardon Materials Inc; 2009-04-30 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Sloan Quarry #1001; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Southern Nevada Paving Inc; 2009-04-30 to 2010-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Southern Nevada Paving Inc; 2009-04-30 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Industries West Central Region, Inc. → Amrize Sloan Quarry #1001; 2010-07-28 to 2012-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries West Central Region, Inc.; 2010-07-28 to 2012-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Aggregate Industries West Central Region, Inc.; 2010-07-28 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Southwest Inc. → Amrize Sloan Quarry #1001; 2012-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Southwest Inc.; 2012-11-25 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Garth  Frehner → Amrize Southwest Inc.; 2012-11-25 to 2004-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Amrize Southwest Inc.; 2012-11-25 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Sloan Quarry #1001; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Bardon Materials Inc; 2015-07-10 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries West Central Region, Inc.; 2015-07-10 to 2012-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Southwest Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Sloan Quarry #1001; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Bardon Materials Inc; 2025-06-23 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Aggregate Industries West Central Region, Inc.; 2025-06-23 to 2012-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Southwest Inc.; 2025-06-23 to current/open; source msha-controller-operator-history