# Relationship history for MSHA mine 3401775

Current hierarchy: **Amrize Ltd → Amrize South Central Inc. → Amrize Thackerville 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Lattimore Properties Inc → Amrize Thackerville Sand Plant; 1950-01-01 to 2011-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Wildcat Sand & Gravel Inc → Amrize Thackerville Sand Plant; 1993-01-01 to 1997-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Ricky  Erlandson → Amrize Thackerville Sand Plant; 1993-01-01 to 1997-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Ricky  Erlandson → Wildcat Sand & Gravel Inc; 1993-01-01 to 1997-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Thackerville Sand & Gravel Company → Amrize Thackerville Sand Plant; 1997-07-11 to 1998-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Charles N  Davis III → Amrize Thackerville Sand Plant; 1997-07-11 to 1998-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Charles N  Davis III → Thackerville Sand & Gravel Company; 1997-07-11 to 1998-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Amrize South Central Inc. → Amrize Thackerville Sand Plant; 1998-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lattimore Properties Inc → Amrize South Central Inc.; 1998-09-28 to 2011-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Thackerville 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 Thackerville 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 Thackerville 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