# Relationship history for MSHA mine 0203328

Current hierarchy: **Amrize Ltd → AMRIZE WEST CENTRAL INC. → Amrize Crusher #2**

- 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

- **controller_controls_mine:** Gary  Schnurr → Amrize Crusher #2; 1950-01-01 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Garth  Frehner → Amrize Crusher #2; 1983-08-01 to 2004-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Crusher #2; 1997-05-14 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Maurice  Tanner et al → Amrize Crusher #2; 2002-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Amrize Crusher #2; 2004-05-10 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Crusher #2; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Granite Express, LLC → Amrize Crusher #2; 2014-01-14 to 2018-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Maurice  Tanner et al → Granite Express, LLC; 2014-01-14 to 2018-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Kelly J  Shepherd et al → Granite Express, LLC; 2014-01-14 to 2018-06-30; source msha-controller-operator-history
- **controller_controls_mine:** JLL Partners Incorporated → Amrize Crusher #2; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Crusher #2; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Landscaping Materials, Inc. → Amrize Crusher #2; 2018-07-01 to 2023-02-19; source msha-controller-operator-history
- **controller_controls_operator:** JLL Partners Incorporated → Pioneer Landscaping Materials, Inc.; 2018-07-01 to 2023-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Schnurr → Pioneer Landscaping Materials, Inc.; 2018-07-01 to 2014-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Southwest Inc. → Amrize Crusher #2; 2023-02-20 to 2026-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Southwest Inc.; 2023-02-20 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Southwest Inc.; 2023-02-20 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Garth  Frehner → Amrize Southwest Inc.; 2023-02-20 to 2004-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Amrize Southwest Inc.; 2023-02-20 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Crusher #2; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Southwest Inc.; 2025-06-23 to 2026-08-04; source msha-controller-operator-history
- **operator_operates_mine:** AMRIZE WEST CENTRAL INC. → Amrize Crusher #2; 2026-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → AMRIZE WEST CENTRAL INC.; 2026-08-05 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → AMRIZE WEST CENTRAL INC.; 2026-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → AMRIZE WEST CENTRAL INC.; 2026-08-05 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → AMRIZE WEST CENTRAL INC.; 2026-08-05 to 2009-04-29; source msha-controller-operator-history