# Relationship history for MSHA mine 3000093

Current hierarchy: **Amrize Ltd → Holcim Quarries NY, INC → HOLCIM GASPORT 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Flintkote Cement Company → HOLCIM GASPORT QUARRY; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Flintkote Company → HOLCIM GASPORT QUARRY; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Flintkote Company → Flintkote Cement Company; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Cimenteries Cbr Cementbedrijven → HOLCIM GASPORT QUARRY; 1980-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Genstar Stone Products Company → HOLCIM GASPORT QUARRY; 1980-04-07 to 1983-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Cimenteries Cbr Cementbedrijven → Genstar Stone Products Company; 1980-04-07 to 1983-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Frontier Stone Inc → HOLCIM GASPORT QUARRY; 1983-12-31 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_mine:** David J  Mahar  et al → HOLCIM GASPORT QUARRY; 1983-12-31 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_operator:** David J  Mahar  et al → Frontier Stone Inc; 1983-12-31 to 1997-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Redland Frontier Inc → HOLCIM GASPORT QUARRY; 1997-04-01 to 1998-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → HOLCIM GASPORT QUARRY; 1997-04-01 to 1998-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Redland Frontier Inc; 1997-04-01 to 1998-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → HOLCIM GASPORT QUARRY; 1998-02-11 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Redland Frontier Inc → HOLCIM GASPORT QUARRY; 1998-02-11 to 2003-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → HOLCIM GASPORT QUARRY; 1998-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Redland Frontier Inc; 1998-02-11 to 2003-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Holcim Quarries NY, INC → HOLCIM GASPORT QUARRY; 2003-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Holcim Quarries NY, INC; 2003-03-26 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → HOLCIM GASPORT QUARRY; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Holcim Quarries NY, INC; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → HOLCIM GASPORT QUARRY; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Holcim Quarries NY, INC; 2025-06-23 to current/open; source msha-controller-operator-history