# Relationship history for MSHA mine 1100009

Current hierarchy: **Amrize Ltd → Amrize Mid-America Inc. → Amrize Rosiclare Quarry**

- 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:** Martin Marietta Materials Inc → Amrize Rosiclare Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Williams Quarry → Amrize Rosiclare Quarry; 1950-01-01 to 1989-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Bob  Williams  et al → Amrize Rosiclare Quarry; 1950-01-01 to 1989-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Williams  et al → Williams Quarry; 1950-01-01 to 1989-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Rigsby & Barnard Quarry Inc  et al → Amrize Rosiclare Quarry; 1989-10-02 to 1997-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Hardin County Materials Company → Amrize Rosiclare Quarry; 1989-10-05 to 1997-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Rigsby & Barnard Quarry Inc  et al → Hardin County Materials Company; 1989-10-05 to 1997-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Aggregates → Amrize Rosiclare Quarry; 1997-05-05 to 2006-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Aggregates; 1997-05-05 to 2006-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Rosiclare Quarry; 2002-01-31 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials Inc → Amrize Rosiclare Quarry; 2006-08-01 to 2011-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials Inc; 2006-08-01 to 2011-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Rosiclare Quarry; 2009-06-01 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge West, Inc → Amrize Rosiclare Quarry; 2011-12-10 to 2018-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge West, Inc; 2011-12-10 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Rosiclare Quarry; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Rosiclare Quarry; 2015-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Lafarge West, Inc; 2015-07-10 to 2018-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Mid-America Inc. → Amrize Rosiclare Quarry; 2018-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Mid-America Inc.; 2018-02-06 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Amrize Mid-America Inc.; 2018-02-06 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Rosiclare Quarry; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Mid-America Inc.; 2025-06-23 to current/open; source msha-controller-operator-history