# Relationship history for MSHA mine 1100123

Current hierarchy: **Amrize Ltd → Amrize South Central Inc. → Amrize Cave In Rock 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 Cave In Rock Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dravo Corp → Amrize Cave In Rock Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Missouri Portland Cement Company → Amrize Cave In Rock Quarry; 1950-01-01 to 1986-01-23; source msha-controller-operator-history
- **controller_controls_mine:** H K Porter Company Inc → Amrize Cave In Rock Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** H K Porter Company Inc → Missouri Portland Cement Company; 1950-01-01 to 1986-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Lattimore Properties Inc → Amrize Cave In Rock Quarry; 1950-01-01 to 2011-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Missouri Portland Cement Company → Amrize Cave In Rock Quarry; 1986-01-24 to 1986-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Cave In Rock Quarry; 1986-01-24 to 1986-11-05; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Missouri Portland Cement Company; 1986-01-24 to 1986-11-05; source msha-controller-operator-history
- **operator_operates_mine:** Dravo Basic Materials Company Inc → Amrize Cave In Rock Quarry; 1986-11-06 to 1995-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Dravo Corp → Dravo Basic Materials Company Inc; 1986-11-06 to 1995-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Aggregates → Amrize Cave In Rock Quarry; 1995-01-03 to 2005-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Aggregates; 1995-01-03 to 2005-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Cave In Rock Quarry; 2001-07-12 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Cave In Rock Quarry; 2001-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Cave In Rock Quarry; 2001-12-12 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials, Inc. → Amrize Cave In Rock Quarry; 2005-05-19 to 2006-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials, Inc.; 2005-05-19 to 2006-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Aggregates Southeast Inc → Amrize Cave In Rock Quarry; 2006-09-15 to 2016-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Aggregates Southeast Inc; 2006-09-15 to 2016-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Cave In Rock Quarry; 2009-06-01 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Cave In Rock Quarry; 2011-03-31 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Cave In Rock Quarry; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Cave In Rock Quarry; 2015-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Building Materials Inc. → Amrize Cave In Rock Quarry; 2016-01-15 to 2018-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Lafarge Building Materials Inc.; 2016-01-15 to 2018-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Building Materials Inc.; 2016-01-15 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Holcim US Inc → Amrize Cave In Rock Quarry; 2018-01-31 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Holcim US Inc; 2018-01-31 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Holcim US Inc; 2018-01-31 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Mid-America Inc. → Amrize Cave In Rock Quarry; 2025-06-23 to 2026-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Mid-America Inc.; 2025-06-23 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Cave In Rock Quarry; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Holcim US Inc; 2025-06-23 to 2025-06-22; 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
- **controller_controls_operator:** Lafarge S A → Amrize Mid-America Inc.; 2025-06-23 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Amrize South Central Inc. → Amrize Cave In Rock Quarry; 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