# Relationship history for MSHA mine 4101118

Current hierarchy: **Amrize Ltd → Amrize South Central Inc. → Amrize Ambrose Sand 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:** Amrize South Central Inc. → Amrize Ambrose Sand Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lattimore Properties Inc → Amrize Ambrose Sand Plant; 1950-01-01 to 2011-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Lattimore Properties Inc → Amrize South Central Inc.; 1950-01-01 to 2011-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Ambrose Sand Plant; 2011-03-31 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize South Central Inc.; 2011-03-31 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Ambrose Sand Plant; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize South Central Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Ambrose Sand Plant; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize South Central Inc.; 2025-06-23 to current/open; source msha-controller-operator-history