# Relationship history for MSHA mine 2003423

Current hierarchy: **Amrize Ltd → AMRIZE GREAT LAKES INC. → Amrize Manchester 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:** Meyer Material Acquisition Corp Et Al → Amrize Manchester Sand and Gravel; 1950-01-01 to 2011-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Manchester Sand and Gravel; 1998-02-11 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Manchester Sand and Gravel; 2003-11-26 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** M-52 Sand & Gravel, LLC → Amrize Manchester Sand and Gravel; 2009-02-02 to 2019-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Rick J  Perlongo → Amrize Manchester Sand and Gravel; 2009-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick J  Perlongo → M-52 Sand & Gravel, LLC; 2009-02-02 to 2019-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Manchester Sand and Gravel; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Manchester Sand and Gravel; 2011-07-12 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Manchester Sand and Gravel; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **operator_operates_mine:** 52 Minerals, LLC → Amrize Manchester Sand and Gravel; 2019-09-01 to 2021-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Osburn → Amrize Manchester Sand and Gravel; 2019-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Osburn → 52 Minerals, LLC; 2019-09-01 to 2021-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Meyer Material CO, LLC → Amrize Manchester Sand and Gravel; 2021-04-01 to 2025-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Meyer Material CO, LLC; 2021-04-01 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Meyer Material Acquisition Corp Et Al → Meyer Material CO, LLC; 2021-04-01 to 2011-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Meyer Material CO, LLC; 2021-04-01 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Manchester Sand and Gravel; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Meyer Material CO, LLC; 2025-06-23 to 2025-07-08; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Great Lakes Inc. → Amrize Manchester Sand and Gravel; 2025-07-09 to 2026-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Great Lakes Inc.; 2025-07-09 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Great Lakes Inc.; 2025-07-09 to 2026-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Amrize Great Lakes Inc.; 2025-07-09 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Midwest Inc. → Amrize Manchester Sand and Gravel; 2026-01-30 to 2026-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Midwest Inc.; 2026-01-30 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Midwest Inc.; 2026-01-30 to 2026-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Midwest Inc.; 2026-01-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Amrize Midwest Inc.; 2026-01-30 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** AMRIZE GREAT LAKES INC. → Amrize Manchester Sand and Gravel; 2026-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → AMRIZE GREAT LAKES INC.; 2026-04-15 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → AMRIZE GREAT LAKES INC.; 2026-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → AMRIZE GREAT LAKES INC.; 2026-04-15 to 2015-07-09; source msha-controller-operator-history