# Relationship history for MSHA mine 4406493

Current hierarchy: **Amrize Ltd → Amrize Mid-Atlantic Inc. → Amrize Mattaponi 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

- **controller_controls_mine:** Charles S  Luck IV  et al → Amrize Mattaponi Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Mattaponi Plant; 1950-01-01 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** King William Sand & Gravel Company Inc → Amrize Mattaponi Plant; 1988-10-01 to 1999-01-31; source msha-controller-operator-history
- **controller_controls_mine:** McKendree G  Fulks → Amrize Mattaponi Plant; 1988-10-01 to 1999-01-31; source msha-controller-operator-history
- **controller_controls_operator:** McKendree G  Fulks → King William Sand & Gravel Company Inc; 1988-10-01 to 1999-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Ennstone PLC → Amrize Mattaponi Plant; 1997-07-29 to 2009-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Luck Stone Corp-Mattaponi Plant → Amrize Mattaponi Plant; 1999-02-01 to 2008-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Charles S  Luck IV  et al → Luck Stone Corp-Mattaponi Plant; 1999-02-01 to 2008-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Ennstone Inc → Amrize Mattaponi Plant; 2008-02-01 to 2011-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Ennstone PLC → Ennstone Inc; 2008-02-01 to 2009-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Mattaponi Plant; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Elliott → Amrize Mattaponi Plant; 2009-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Elliott → Ennstone Inc; 2009-06-11 to 2011-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Mid-Atlantic Inc. → Amrize Mattaponi Plant; 2011-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Mid-Atlantic Inc.; 2011-11-01 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Amrize Mid-Atlantic Inc.; 2011-11-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Mattaponi Plant; 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 Mattaponi Plant; 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