# Relationship history for MSHA mine 2300676

Current hierarchy: **Amrize Ltd → Amrize South Central Inc. → Amrize Bridgeton Sand and Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Lattimore Properties Inc → Amrize Bridgeton Sand and Gravel; 1950-01-01 to 2011-03-30; source msha-controller-operator-history
- **operator_operates_mine:** St Charles Sand Company → Amrize Bridgeton Sand and Gravel; 1950-01-01 to 2008-06-24; source msha-controller-operator-history
- **controller_controls_mine:** St Charles Sand Company → Amrize Bridgeton Sand and Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** St Charles Sand Company → St Charles Sand Company; 1950-01-01 to 2008-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Bridgeton Sand and Gravel; 2001-07-12 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge North America, Inc → Amrize Bridgeton Sand and Gravel; 2008-06-25 to 2013-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge North America, Inc; 2008-06-25 to 2013-01-09; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Bridgeton Sand and Gravel; 2009-06-01 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Bridgeton Sand and Gravel; 2011-03-31 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Mid-America Inc. → Amrize Bridgeton Sand and Gravel; 2013-01-10 to 2026-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Amrize Mid-America Inc.; 2013-01-10 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Bridgeton Sand and Gravel; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Mid-America Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Bridgeton Sand and Gravel; 2015-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Lafarge North America, Inc; 2015-07-10 to 2013-01-09; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Bridgeton Sand and Gravel; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Mid-America Inc.; 2025-06-23 to 2026-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Amrize South Central Inc. → Amrize Bridgeton Sand and Gravel; 2026-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize South Central Inc.; 2026-04-15 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize South Central Inc.; 2026-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lattimore Properties Inc → Amrize South Central Inc.; 2026-04-15 to 2011-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize South Central Inc.; 2026-04-15 to 2015-07-09; source msha-controller-operator-history