# Relationship history for MSHA mine 2103226

Current hierarchy: **Amrize Ltd → Aggregate Industries - MWR, Inc. → Plant P-91**

- 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:** Aggregate Industries PLC → Plant P-91; 1997-05-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Camas Minndak Inc → Plant P-91; 2000-04-01 to 2002-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Camas Minndak Inc; 2000-04-01 to 2002-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Plant P-91; 2001-06-01 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Industries, Inc. → Plant P-91; 2002-03-07 to 2003-11-25; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Aggregate Industries, Inc.; 2002-03-07 to 2003-11-25; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Industries - MWR, Inc. → Plant P-91; 2003-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Plant P-91; 2003-11-26 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Aggregate Industries - MWR, Inc.; 2003-11-26 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Plant P-91; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries, Inc.; 2009-04-30 to 2003-11-25; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries - MWR, Inc.; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Plant P-91; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries, Inc.; 2015-07-10 to 2003-11-25; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries - MWR, Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Plant P-91; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Aggregate Industries, Inc.; 2025-06-23 to 2003-11-25; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Aggregate Industries - MWR, Inc.; 2025-06-23 to current/open; source msha-controller-operator-history